Chisen OPzV2-2000 2V2000Ah Tubular GEL VRLA Battery

30-Second Read: Chisen OPzV2-2000

• Model & Specs: Chisen OPzV2-2000 | 2V 2000Ah (C10) | Tubular GEL VRLA Battery

• Technology: Tubular positive plate + nano gel electrolyte + valve-regulated sealing (standards covered in §4)

• Core Advantages: Cycle life ≥ 1500 cycles (80% DOD) / float design life 20+ years (25°C)

• Typical Applications: Telecom base stations (especially unattended) + PV/Wind energy storage + extreme environment float charging + outdoor cabinets

• §1 Chisen OPzV2-2000 Product Definition and 4 Core Advantages

Chisen OPzV2-2000 is a 2V 2000Ah tubular gel valve-regulated battery.

Technology roadmap: tubular positive plate + nano gel electrolyte + valve-regulated sealed structure (standards covered in §4).

Application scenarios: OPzV2-2000 is a 2V cell. 24 cells in series form a 48V system / 54 cells in series form a 108V system (compatible with 110V) / 108 cells in series form a 216V system (compatible with 220V) / 190 cells in series form a 380V three-phase DC system.

Fields of application: telecommunications / renewable energy / extreme environments (suitable for cyclic use).




Advantage	Technical Implementation	Customer Value
Tubular positive plate structure	Tubular positive plate + nano gel electrolyte + valve-regulated sealed design	Cycle life 1500+ cycles (80% DOD)
20+ year float design life	25°C float voltage 2.25-2.27V/cell (with -3.3mV/°C temperature compensation)	Annual failure rate < 0.5%
Maintenance-free + safety	Valve-regulated sealed structure, no water refilling needed; integrated explosion-proof acid filter safety valve	Suitable for unattended sites (base stations, islands, border posts)
Multi-standard coverage	7 international/regional/industry standards (see §4)	Marketable to 60+ countries







Chisen CHISEN brand established in 2002, specializing in tubular batteries for 20+ years, exported to 60+ countries, supplying industrial customers in telecommunications / power / data centers / PV / railway / medical sectors.

• §2 Chisen OPzV2-2000 Core Specification Quick Reference

The table below is the OPzV2-2000 core specification quick reference (detailed standards in §4, application scenarios in §7, float voltage details in §12).




Parameter	Value	Standard / Note
Rated Voltage	2V (DC)
Rated Capacity	2000Ah (C10)
Model	OPzV2-2000
Series	Tubular GEL VRLA Battery
Applicable Standards	IEC 60896 + DIN 40472 + GB/T 19638 (7 standards, see §4)
Dimensions (L×W×H)	399 × 212 × 772 mm
Total Height (with terminals)	807 mm
Battery Weight (filled with electrolyte)	142.0kg（313.1 lbs，spec measured)
Terminal Type	Φ20-M8
Terminal Torque	10-12 N·m
Operating Temperature (Discharge)	-40°C ~ 65°C
Operating Temperature (Charge)	-30°C ~ 65°C
Operating Temperature (Storage)	-25°C ~ 45°C
Float Voltage	2.25-2.27V/cell (25°C)
Float Temperature Compensation	-3.3mV/°C/cell
Equalize Voltage	2.30-2.35V/cell (25°C)
Equalize Temperature Compensation	-5mV/°C/cell
Cycle Charging Voltage	2.35-2.40V/cell (25°C)
Max Charging Current	500A
Max Discharge Current (5s)	3000A
Self-discharge Rate	2% / month (storable 1 year without recharging，25°C）
Internal Resistance (fully charged / 25°C)	0.3 mΩ
Short-circuit Current	8300A
Cycle Life	≥1500 cycles (80% DOD)
Float Design Life	20+ years (25°C)
Transport / Sea Freight	IMDG Class 8 / UN2794 / MSDS
Certifications	Arranged per customer requirements (see §4)







• §3 Chisen OPzV2-2000 Model Naming Rules — OPzV Letter Breakdown and DIN 40472 Definition

Chisen OPzV2-2000 model naming follows the German DIN 40472 (tubular valve-regulated gel) + international IEC 60896 standard naming rules. OPz is the abbreviation of the German word "Ortsfeste Panzerplatten", meaning "stationary tubular armored plate".

OPzV / OPzS letter meaning comparison table (DIN 40472 definition):




Letter	German full name / meaning	Technical meaning
OPz	Ortsfeste Panzerplatten / stationary tubular armored plate	Positive plate = tubular plate
V	V = Valve Regulated / V = Vented	Valve-regulated sealing / GEL
2	2V cell voltage	48V = 24 cells / 110V = 54 cells / 220V = 108 cells in series
2000	2000Ah capacity (C10 / 10-hour rate)	Discharge to 1.80V/cell at 10-hour rate







• §4 Chisen OPzV2-2000 Applicable International / European / Chinese / UK / North American Standards List

Chisen OPzV2-2000 complies with the following 7 international / regional / industry standards (product design basis). Standard compliance = sales compliance + customs clearance + one-pass project bidding.




Standard	Number	Scope of application
International IEC	IEC 60896-21/22:2004	Stationary valve-regulated batteries - test methods + dimensions / terminals / marking
International IEC	IEC 61427	PV energy storage batteries (hard requirement for solar project bidding)
German DIN	DIN 40472:2015	Tubular valve-regulated batteries (gold standard)
Chinese National Standard	GB/T 19638.1-2014	Stationary valve-regulated batteries (market sales compliance)
Chinese Telecom	YD/T 1360	Telecom operator backup power (mandatory for tenders)
European	Eurobat Long Life	European battery life classification (> 12 years float)
UK / North America	BS 6290 Part 4 / UL 1989	UK / North American backup power market







Note: third-party inspection certificates / destination-country special certifications (SONCAP / PVOC / SASO / BIS / ESMA) can be arranged per customer requirements (supported by mainstream agencies such as SGS / TUV / BV / CTI).

• §5 Chisen OPzV2-2000 Physical Structure and Materials (Tubular Positive Plate vs Flat Plate)

Chisen OPzV2-2000 physical structure design (tubular positive plate is the core; cycle life is 1.5-2x higher than flat plate batteries):




Component	Material / Spec	Description
Positive grid	Die-cast tubular grid, Pb-Ca alloy	Fiberglass tube wraps the positive active material (PbO2)
Negative grid	Radial negative grid, Pb-Ca alloy	Improves active material utilization
Separator	Imported PVC composite separator	Low resistance / high porosity / aging resistant
Electrolyte	High-purity nano gel electrolyte	SiO2 fumed gel + H2SO4
Container	High-strength ABS plastic	UL94 V-0 flame retardant grade
Cover	High-strength ABS resin	Sealed / flame retardant
Terminal seal	Triple seal structure	Epoxy + rubber ring + anti-leak ring
Safety valve	Integrated explosion-proof / acid filter	Automatic pressure regulation (0.1-0.2 MPa)







OPzV opaque container: on-site inspection via terminal voltage + infrared temperature measurement (no need to open the cover)

• §6 Chisen OPzV Series — Full Specification Table of 18 Models, 100Ah-3000Ah

Chisen OPzV series — 18 models from 100Ah to 3000Ah (tubular gel valve-regulated / Tubular GEL VRLA). All comply with IEC 60896-21/22 + DIN 40472 + GB/T 19638.1-2014 standards. Models within the same series can be flexibly mixed in series to form different voltage systems (48V = 24 cells / 110V = 54 cells / 220V = 108 cells / 380V = 190 cells).




Item	OPzV (Tubular GEL VRLA)	OPzS (Tubular Flooded)
Electrolyte	Nano silica-based gel (fixed, non-flowing)	Dilute sulfuric acid 1.24 g/cm3 (liquid)
Positive plate	Die-cast tubular (Pb-Ca alloy)	Die-cast tubular (Pb-Sb low antimony alloy)
Applicable DIN standard	DIN 40472:2015 (tubular valve-regulated)	DIN 40736-1:1985 (tubular flooded)
Container	ABS flame retardant UL94 V-0 (opaque)	SAN transparent plastic (liquid level visible)
Short-circuit current (100Ah)	1700 A	1500 A
Internal resistance (20°C)	0.0011 Ohm (1.1 mΩ)	0.001 Ohm (1.0 mΩ)
Max charging current	30 A (0.30C10)	20 A (0.20C10)
Self-discharge rate (20°C fully charged)	2%/month	3%/month
Float voltage (25°C)	2.25-2.27V/cell	2.24V/cell
Equalize voltage (25°C)	2.30-2.35V/cell	2.35-2.40V/cell







II. Environmental adaptability (4 rows):




Parameter dimension	OPzV GEL valve-regulated	OPzS flooded
Operating temperature (discharge)	-40°C ~ 65°C (gel withstands high temp)	-40°C ~ 60°C
Operating temperature (charge)	-30°C ~ 65°C	-30°C ~ 55°C
Capacity - temperature (40°C)	about 105%	108%
Capacity - temperature (-20°C)	about 55%	about 65% (estimated)







III. Life and cycling (4 rows):




Parameter dimension	OPzV GEL valve-regulated	OPzS flooded
Float life (25°C)	20+ years	20+ years (requires periodic refilling)
Float life (30°C)	about 10 years	8-10 years
Cycle life (DOD 80%)	≥ 1500 cycles	1500-2500 cycles
Cycle life (DOD 50%)	2200+ cycles	2500-4000 cycles







IV. Maintenance and installation (4 rows):




Parameter dimension	OPzV GEL valve-regulated	OPzS flooded
Water refilling	Maintenance-free (no refilling needed)	Refill every 3-6 months (distilled water)
Acid mist emission	Minimal (valve-regulated sealed + acid filter)	More (flooded + filter vent)
Installation orientation	Vertical / horizontal / side (not inverted)	Must be vertical (electrolyte would leak)
On-site inspection	Not possible (opaque container)	Possible (transparent container to check liquid level / plates)







V. Commercial and decision-making (4 rows):




Parameter dimension	OPzV GEL valve-regulated	OPzS flooded
Purchase cost (relative)	Higher (+15-25% vs OPzS)	Lower (mature technology)
Maintenance cost (20 years)	Very low (maintenance-free)	Medium (labor + distilled water)
TCO (20 years)	Medium (higher purchase + low maintenance)	Low (lower purchase + medium maintenance)
Recycling value	High (lead recyclable)	High (lead recyclable)







VI. Selection decision conclusion (if you care about X → choose Y):




Concern / application scenario	Recommended choice	Reason
Unattended / remote / island / border base stations	OPzV	Maintenance-free + vertical/horizontal/side installation + valve-regulated sealing (40% O&M savings)
Tropical / desert / extreme high temperature rooms (>45°C sustained)	OPzV	Gel withstands high temperature (charge -30~65°C vs OPzS -30~55°C)
Deep cycle applications (PV daily 1 cycle at 80% DOD)	OPzS	50% higher cycle life (2500 vs 1500 cycles)
Large UPS data centers (>500 kVA high rate)	OPzS	Long deep-cycle life (1500-2500 cycles) + large capacity (2000+ Ah) reduces series cell count
Mobile equipment / tilted installation / vehicle batteries	OPzV	Vertical/horizontal/side installation (valve-regulated, no leakage)
Transparent inspection / on-site maintenance (manned rooms with regular patrol)	OPzS	SAN transparent container + filter vent (visible maintenance + acid mist filtration)







• §9 Tubular Battery Selection Decision Table — OPzV / OPzS / AGM Comparison

Comparison of Chisen OPzV / OPzS / AGM three types of lead-acid batteries in large industrial energy storage and backup power scenarios, with selection recommendations:

Selection decision table (if your application is X → recommended Y): data center UPS / 5G base station / PV energy storage / unattended / remote deployment → OPzV (tubular gel valve-regulated, maintenance-free + vertical/horizontal/side installation). Large data center UPS (>500 kVA) / railway signaling / emergency lighting / ship main control / manned rooms → OPzS (flooded type with longer life + lower cost + higher short-circuit current). Automotive starting / e-bikes / motorcycles / small UPS / short backup (<30 min) → AGM flat plate (lowest cost).




Comparison item	OPzV (tubular gel valve-regulated)	OPzS (tubular flooded)	AGM (flat plate valve-regulated)
Positive plate structure	Tubular	Tubular	Flat plate
Electrolyte	Nano gel (GEL)	Dilute sulfuric acid (flooded)	AGM fiberglass
Valve-regulated	Yes (sealed)	No (open + vent)	Yes (sealed)
Maintenance-free	Maintenance-free	Requires refilling (3-6 months)	Maintenance-free
Cycle life (80% DOD)	≥ 1500 cycles	1500-2500 cycles	500-1000 cycles
High-rate discharge capability	Strong (1500-8300A)	Medium (1500-1600A)	Medium (800-1500A)
Installation orientation	Vertical/horizontal/side	Must be vertical	Vertical/horizontal/side
Typical applications	UPS / base station / PV / unattended	Large UPS / railway / ship / emergency	Auto starting / small UPS / e-bikes
Relative price	Medium	Low	Low
Environmental compliance	RoHS / REACH / WEEE	RoHS / REACH / WEEE	RoHS / REACH / WEEE







• §10 Chisen OPzV2-2000 Capacity Sizing Formula + Solar and Wind Configuration Parameters

Battery capacity (Ah) = load power (W) × backup duration (h) ÷ bus voltage (V) ÷ inverter efficiency ÷ temperature coefficient

Where: inverter efficiency UPS 0.85 / DC load 1.0; temperature coefficient 25°C = 1.0 / 35°C = 0.85 / 45°C = 0.70 (high-temperature derating); 20-30% margin recommended.

Example 1: telecom base station 48V system, 4-8h backup then generator switchover. Load 1 kW, backup 4h, bus 48V, efficiency 0.85, temperature 25°C. Capacity = 1000 × 4 ÷ 48 ÷ 0.85 ÷ 1.0 ≈ 98Ah. Recommended: OPzV2-2000 (24 cells in series for 48V), 2% margin.

Example 2: PV grid-connected/off-grid storage 5kW system, 4h backup. Load 5 kW, backup 4h, bus 48V, efficiency 0.85, temperature 25°C. Capacity = 5000 × 4 ÷ 48 ÷ 0.85 ÷ 1.0 ≈ 490Ah. Recommended: OPzV2-500 (24 cells in series for 48V), 2% margin.

Example 3: 110V DC panel, 10h backup. Load 0.5 kW, backup 10h, bus 110V, efficiency 1.0 (DC load), temperature 25°C. Capacity = 500 × 10 ÷ 110 ÷ 1.0 ÷ 1.0 ≈ 45Ah. Recommended: OPzV2-2000 (54 cells in series for 108V), 100% margin.

Example 4: 220V three-phase DC industrial power, 30 min full-load backup. Load 100 kW, backup 0.5h, bus 220V, efficiency 1.0, temperature 25°C. Capacity = 100000 × 0.5 ÷ 220 ÷ 1.0 ÷ 1.0 ≈ 227Ah. Recommended: OPzV2-250 (108 cells in series for 220V), 10% margin.

More series configurations (48V = 24 cells / 110V = 54 cells / 220V = 108 cells / 380V = 190 cells) are detailed in §7 application scenarios.

Solar / wind system application configuration parameters (CHISEN spec sheet p1 measured):




Parameter	Setpoint	Description
Over voltage disconnect	2.45 ± 0.01V/cell @25°C	Over-voltage disconnect (charge complete / solar controller disconnects battery)
Regulation/equalize voltage	2.40 ± 0.01V/cell @25°C	Equalize voltage (periodic balancing, every 30-60 days)
Array reconnect voltage	2.25 ± 0.005V/cell @25°C	Solar array reconnect voltage (reconnect after float recovery)
Float voltage setting	2.27 ± 0.005V/cell @25°C	Float voltage (steady state of PV standalone power)
Low voltage alarm	1.95 ± 0.005V/cell @25°C	Low voltage alarm (load about to disconnect)
Low voltage disconnect	1.90 ± 0.005V/cell @25°C	Low voltage disconnect (load disconnected to protect battery from over-discharge)
Load reconnect voltage	2.09 ± 0.01V/cell @25°C	Load reconnect voltage (reconnect after over-discharge recovery)
Temp. compensate coefficient	-3 ~ -5 mV/°C/cell	Temperature compensation coefficient (float -3.3mV, equalize -5mV)







Free engineering sizing: send "system voltage + load power + backup duration + operating temperature" to sales@chisen.cn, receive a complete Excel sizing sheet + quotation within 24 hours.

Step 1 Confirm system voltage + number of cells in series: telecom base station / PV / UPS / railway / medical / marine → 24 cells in series (48V system) / 54 cells (108V, compatible with 110V DC panels) / 108 cells (216V, compatible with 220V industrial power) / 190 cells (380V three-phase DC data center UPS).

Step 2 Select capacity: calculate with the formula "battery capacity = load power × backup duration ÷ bus voltage ÷ inverter efficiency ÷ temperature coefficient" → choose the closest standard capacity (100 / 200 / 300 / 500 / 1000 / 1500 / 2000 / 3000 Ah), reserve 20-30% margin.

Step 3 Check cycle life + battery type: float backup (base station / UPS) → OPzV (maintenance-free 20+ years); deep cycle (PV daily cycle) → OPzV or OPzS (tubular ≥1500 cycles); high current (data center UPS > 500 kVA) → OPzS (short-circuit 1500A+).

Step 4 Check dimensions + weight: OPzV2-2000 dimensions 103×206×390mm / weight 13.2kg (incl. electrolyte), OPzS2-100 dimensions 103×206×409mm / weight 12.6kg (incl. electrolyte); reserve ≥ 50mm heat dissipation spacing for battery cabinets / racks.

Step 5 Select after-sales + certifications: project bidding / customs clearance requires corresponding national standards (see §4); CHISEN recommended (20+ year brand + 60+ country export experience + assistance with destination-country certifications on demand).

• §11 Chisen OPzV2-2000 Cycle Life Details + 20-Year TCO Life Cycle Cost Comparison (Tubular vs AGM)

Chisen OPzV2-2000 cycle life ≥ 1500 cycles (80% DOD, IEC 60896-21 standard test conditions, 25°C). The tubular positive plate design is the core advantage — at the same capacity, cycle life is 1.5-2x that of flat plate batteries.

Tubular vs flat positive plate cycle life comparison (DIN 40472 + measured):




Depth of discharge (DOD)	Tubular (Chisen OPzV/OPzS)	Flat plate (AGM)	Life difference
80% DOD (deep cycle)	1500-2500 cycles	500-1000 cycles	×1.5-2.5
50% DOD (medium cycle)	2200-3500 cycles	750-1500 cycles	×2-3
30% DOD (shallow cycle)	3500-6500 cycles	1500-3000 cycles	×2-3
Float standby (no cycling)	20+ years (25°C)	10-15 years (25°C)	×1.5-2
Application scenario	Depth of discharge	Cycle count	Service years
Telecom base station 4-8h backup then generator switchover	50% DOD	2200+ cycles	6-7 years
PV grid-connected/off-grid storage (daily deep cycle)	80% DOD	1500+ cycles	4+ years
UPS high-rate pulse discharge (backup)	30% DOD	3500+ cycles	10+ years
Float standby (base station / nuclear EPS)	0% DOD	—	20+ years (25°C)







Working principle of the tubular positive plate:

The fiberglass tube fully wraps the positive active material (PbO2), preventing shedding and deformation of active material, extending deep-cycle life. This is the core design point of the DIN 40472 standard.

Chisen OPzV cycle life vs DOD precise curve (CHISEN spec sheet measured, 25°C, 2.23V/cell float, IEC 60896-21 test conditions):




Depth of discharge	Cycle life	Application scenario	Corresponding years (1 cycle per day)
20% DOD	5500 cycles	UPS pulse discharge / frequent telecom base station switching	15+ years
30% DOD	4000 cycles	Shallow cycle emergency / partial backup	11+ years
50% DOD	2500 cycles	Medium cycling / solar off-grid	7+ years
80% DOD	≥ 1500 cycles (nominal)	Deep cycle (OPzV nominal / spec measured 1300 cycles)	3.5+ years
100% DOD	800 cycles	Full discharge (emergency condition)	2+ years







v25 addition: combined cycle life and TCO life cycle cost demonstration (typical 48V 2000Ah backup system, 20-year total cost of ownership):




Cost item	OPzV	OPzS	AGM flat plate valve-regulated
	Tubular gel valve-regulated (Chisen)	Tubular flooded (Chisen)
Initial purchase cost (incl. installation)	Medium (tubular gel)	Lower (tubular flooded / mature process)	Lowest (flat plate valve-regulated)
Design service life	20+ years (25°C float)	20-25 years (25°C float, with regular maintenance)	8-12 years (25°C float)
Replacements needed in 20 years	0 times (buy once, use for life)	0 times (no replacement in 20 years with good maintenance)	1-2 times (around year 8 / year 16)
Annual maintenance cost	Very low (maintenance-free, only cleaning)	Medium (refill + clean every 3-6 months)	Medium (voltage monitoring + cleaning)
20-year total cost of ownership (TCO)	Medium (medium purchase + low maintenance)	Lower (low purchase + medium maintenance)	High (low purchase + short life requiring multiple replacements)







B2B key conclusion: tubular batteries cost about 1.5-2x more upfront than AGM flat plate, but last 2x+ longer, and 20-year TCO is 30-40% lower than AGM.

• §12 Chisen OPzV2-2000 Float Voltage Setting and Temperature Compensation Formula

Chisen OPzV2-2000 standard float voltage is 2.25-2.27V/cell (25°C, equalize with independent -5mV/°C compensation), and requires float temperature compensation of -3.3mV/°C/cell.

Float voltage temperature compensation formula (IEC 60896-21:2004):

V_float (actual temperature) = 2.27V + (-3.3mV/°C) × (actual temperature - 25°C)




Ambient temperature	Calculation formula	Compensated float voltage
25°C (reference)	2.27V (no compensation)	2.25-2.27V
15°C	2.27 + (-3.3mV × -10)	2.30V
35°C	2.27 + (-3.3mV × 10)	2.24V
45°C	2.27 + (-3.3mV × 20)	2.20V
55°C	2.27 + (-3.3mV × 30)	2.17V







Equalize voltage (independent compensation): 2.30-2.35V/cell (@25°C) with -5mV/°C/cell compensation. Purpose: recharging lagging cells / once a month, switch back to float after equalize.

Float voltage accuracy requirement: ±1% (±25mV); exceeding this range significantly shortens battery life.

Float current: < 5mA/Ah (Chisen spec), i.e., a 2000Ah battery float current < 500mA.

• §13 Chisen OPzV2-2000 Operating Temperature Range (Discharge / Charge / Storage)

Chisen OPzV2-2000 operating temperature by scenario (spec sheet classification): discharge -40°C ~ 65°C (gel electrolyte has better temperature resistance than flooded), charge -30°C ~ 65°C (high-temperature limit meets tropical region applications), storage -25°C ~ 45°C (strictest storage condition). Optimal operating temperature 25°C (rated capacity definition point).

Effect of temperature on capacity (OPzV spec sheet Capacity vs Temperature curve measured, 10HR capacity):




Ambient temperature	Capacity (10HR)	Application recommendation
50°C	about 107%	High-temperature limit, life significantly reduced (life halves for every 10°C above 30°C)
40°C	about 105%	High-temperature operation, forced ventilation required (life about 5 years)
25°C	100%	Rated capacity reference (design life 20 years)
0°C	about 80%	Low-temperature operation, slight capacity reduction
-20°C	about 55%	Extreme low-temperature operation, significant capacity loss (not suitable for high-current discharge)







Effect of temperature on float life (spec sheet Temperature vs Float Life curve measured):




Operating temperature	Float life	Applicable scenario
20°C	about 22 years	Ideal server room / underground telecom station / climate-controlled base station
25°C	20 years	Rated life (spec sheet definition point)
30°C	about 10 years	Outdoor cabinet (no AC), consider temperature compensation + derating
40°C	about 5 years	Desert / plateau server room (forced ventilation + shading)
50°C	about 2 years	Extreme conditions (not recommended, battery life < 3 years)







High-altitude usage requirements (GB/T 19638): ≤ 3000m normal use without special treatment; > 3000m, capacity derated 8% per 1000m elevation; extreme high altitude (> 5000m) requires special customization (low-pressure sealing + reinforced container).

Temperature-compensated float voltage requirement: 25°C = 2.25-2.27V/cell / -3.3mV/°C/cell. Charging stages additionally use -5mV/°C compensation.

• §14 Chisen OPzV2-2000 Self-discharge Rate and Storage Conditions

Chisen OPzV2-2000 self-discharge rate is 2%/month (CHISEN spec sheet measured value, stored fully charged at 20°C — note: the industry commonly uses 25°C as reference, the spec sheet uses 20°C).

Self-discharge characteristic curve by storage temperature (CHISEN spec sheet Self Discharge Characteristics measured):




Storage temperature	After 6 months	After 12 months	After 18 months	After 24 months
	remaining capacity	remaining capacity	remaining capacity	remaining capacity
10°C	about 92%	about 85%	about 80%	about 75%
20°C	about 88%	about 78%	about 70%	about 60%
30°C	about 70%	about 50%	refill required	refill required
40°C	about 55%	refill required	refill required	refill required







Storable duration by storage temperature (without recharging): at 20°C can be stored 1 year (OPzV) / 9-12 months (OPzS) with 65-75% remaining capacity; at 25°C stored 1 year (OPzV) / 9-12 months (OPzS); at 35°C only 6-9 months before recharging needed, remaining 60-70%; at 45°C only 3 months before recharging needed, remaining 55-65%; at 15°C 18-24 months without recharging, remaining 65%+; at extreme cold -20°C can be stored 24+ months without recharging.

Storage recommendations: store fully charged in -25°C ~ 45°C dry, ventilated environment, avoid direct sunlight, organic solvents, and corrosive gases. Perform a boost charge every 3-6 months (constant voltage 2.27V/cell (OPzV) / 2.24V/cell (OPzS) for 24 hours). Batteries stored over 12 months must undergo a capacity test before recommissioning.

• §15 Chisen OPzV2-2000 Max Charging Current and Discharge End Voltage

Chisen OPzV2-2000 recommended max charging current: 500A (max allowed, spec measured).

Charging parameter recommendation table (IEC 60896 + GB/T 19638):




Charging stage	Voltage (25°C)	Current limit	Application scenario
Float	2.25-2.27V/cell (OPzV) / 2.24V/cell (OPzS)	< 5mA/Ah (≈0.5A)	Backup power / float standby
Equalize	2.30-2.35V/cell (OPzV) / 2.35-2.40V/cell (OPzS)	≤ 0.25C10 A	Once a month / lagging cell recharge
Cycle charge	2.35-2.40V/cell	≤ 0.20C10 A	PV energy storage / deep cycle
Boost (solar)	2.35V±0.005V/cell	≤ 0.20C10 A	Solar/wind energy storage (emergency charging)







Charging temperature compensation: charging voltage follows float voltage, with -3.3mV/°C/cell compensation (float / equalize with independent -5mV/°C/cell compensation).

Charge termination judgment: the battery is considered fully charged when charging current drops below 0.5% C10.




Discharge current I(A)	End voltage Vpc	Application scenario
I < 0.05C	≥ 1.90Vpc	Very small current long-term discharge (backup monitoring)
0.05C ≤ I < 0.08C	≥ 1.85Vpc	Small current float backup
0.08C ≤ I < 0.2C	≥ 1.80Vpc	10HR standard discharge
0.2C ≤ I < 0.6C	≥ 1.75Vpc	5HR medium current discharge
0.6C ≤ I < 1.0C	≥ 1.70Vpc	1HR high current discharge
1.0C ≤ I < 2.0C	≥ 1.60Vpc	High power pulse discharge







• §16 Chisen OPzV2-2000 OEM / ODM One-Stop Customization

Chisen OPzV2-2000 supports OEM / ODM one-stop customization services. All customizations do not affect standard specification performance.

Container color customization

Custom ABS container by customer Pantone color code (standard gray-white + red/blue/green/yellow/orange + customer-specified color)

LOGO silkscreen printing

Customer LOGO printed on the container (no language limit, any language can be customized)

Laser marking

Laser marking on the side of the battery cover (model / serial number / production date / customer code / barcode)

Color box / neutral box packaging

Standard color box + neutral outer box, customizable Logo / color / barcode / anti-counterfeit label

Label customization

Battery label typeset per customer requirements (no language limit, any language can be customized)

Terminal replacement

Φ16-M6 / Φ20-M8 / Φ24-M10 three options (standard Φ20-M8)

Terminal seal upgrade

Standard + triple seal structure + explosion-proof acid filter (OPzS with optional acid-proof vent)

Third-party test reports

Optional SGS / TUV / BV pre-shipment inspection + full IEC 60896 test report

MOQ and lead time data: sample order from 1 unit (inquire by email); small batch 24 units (24V system 12 cells + 12 spare) / 48 units (48V system 24 cells + 24 spare); large batch 200+ units (multiple voltage combinations with full OEM customization). Specific lead time + warranty details, please see the contact info at the end.

• §17 Chisen OPzV2-2000 FAQ — 25 Engineer-Reviewed Questions

Chisen OPzV2-2000 FAQ (25 items). Each covers the most frequently asked high-frequency questions by industrial field engineers, spanning technical parameters, sizing, ordering, shipping, and after-sales.

OPzV2-2000 float voltage setting?

Standard float voltage 2.25-2.27V/cell @25°C, must apply temperature compensation -3.3mV/°C/cell (IEC 60896-21).

OPzV2-2000 cycle life?

≥ 1500 cycles (80% DOD, 25°C), float standby life 20+ years. The tubular positive plate design is the core advantage (1.5-2x higher than flat plate AGM).

OPzV2-2000 operating temperature range?

-40~65°C discharge / -30~65°C charge / -25~45°C storage (optimal 25°C). OPzV gel valve-regulated has better temperature resistance than flooded.

OPzV2-2000 self-discharge rate?

2%/month (CHISEN spec sheet measured, stored fully charged at 20°C), can be stored 1 year without recharging.

OPzV2-2000 battery type?

Tubular GEL VRLA (valve-regulated lead-acid) battery, tubular positive plate structure, gel electrolyte, valve-regulated sealed.

Difference between OPzV2-2000 and OPzS2-100?

OPzV is valve-regulated sealed GEL, maintenance-free; OPzS is flooded open type requiring periodic refilling (vertical preferred). OPzV has higher short-circuit current (8300A vs 1500A), OPzS has slightly lower internal resistance (0.001 vs 0.0011 Ohm), OPzS is cheaper (mature process).

OPzV2-2000 internal resistance?

About 0.3 mΩ fully charged (25°C), short-circuit current about 8300A.

OPzV2-2000 charging method?

Recommended constant voltage constant current (CC-CV), float 2.25-2.27V / equalize 2.30-2.35V / cycle 2.35-2.40V. Max charging current 500A.

OPzV2-2000 storage conditions?

-25°C ~ 45°C dry, ventilated environment; no recharging needed within 6 months of storage. For storage > 6 months, a full charge is recommended (2.25-2.27V/cell × 24h).

Which national standards apply to OPzV2-2000?

See §4 for the applicable standards list (7+ international / regional / industry standards).

OPzV2-2000 weight?

142.0kg), incl. electrolyte (CHISEN spec sheet measured); excl. packaging / excl. terminals.

OPzV2-2000 dimensions?

Length Length 399mm × width 212mm × height 807mm (CHISEN spec sheet measured, incl. terminals).

OPzV2-2000 terminal torque?

10-12 N·m (Φ20-M8 bolt terminal).

OPzV2-2000 short-circuit current?

About 8300A (25°C fully charged), meeting large UPS short-circuit protection requirements.

OPzV2-2000 float design life?

20+ years (25°C float voltage 2.25-2.27V, temperature compensation -3.3mV/°C).

How to choose between OPzV2-2000 and AGM flat plate?

Tubular positive plate lasts longer (1500+ cycles vs 500-1000 cycles), suitable for long-term projects / critical backup; AGM flat plate is cheaper, suitable for short-term / budget-sensitive. Refer to §11 TCO chapter.

OPzV2-2000 installation orientation?

Can be vertical/horizontal/side installed (not inverted), suitable for confined cabinet spaces. OPzV valve-regulated sealed design has no electrolyte leakage risk.

Does OPzV2-2000 need water refilling?

No. OPzV valve-regulated sealed + gel electrolyte requires no refilling throughout its life.

Is OPzV2-2000 capacity affected by temperature?

40°C = 105% / 25°C = 100% / 0°C = 80% / -20°C = 55% capacity (10HR discharge rate, per CHISEN spec sheet Capacity vs Temperature curve).

Which documents are needed for exporting OPzV2-2000?

Standard documents: packing list + commercial invoice + CO certificate of origin + MSDS + UN2794 transport appraisal. Destination-country special certifications (SONCAP / PVOC / SASO / BIS / ESMA) can be assisted on demand.

OPzV2-2000 MOQ?

Sample 1 unit / 24V system 12 cells / 48V system 24 cells / 110V system 54 cells / 220V system 108 cells. Bulk 200+ units enjoy wholesale pricing.

OPzV2-2000 lead time?

Please email sales@chisen.cn for quotation (lead time evaluated by quantity + destination country + expected delivery date).

OPzV2-2000 warranty?

24-month basic warranty (from installation and commissioning). Extendable to 36 months negotiable at bidding.

Does OPzV2-2000 support OEM customization?

Yes, OEM/ODM one-stop customization: container color, LOGO silkscreen, laser marking, color box packaging, label customization, terminal replacement. MOQ 50-100 units.

Does the OPzV2-2000 price include shipping?

EXW factory price; sea freight quoted by destination port (FOB/CIF/DDP optional). Please contact sales@chisen.cn for quotation.

• §18 Chisen OPzV2-2000 Daily Use and Maintenance Recommendations (Engineer Practical Guide)

Chisen OPzV2-2000 daily use + maintenance recommendations (engineer practical guide). Following these specifications can significantly extend battery life to 20+ years:

1. Charger selection: must use an industrial-grade smart charger (with pulse desulfation function, matching 12V/24V/48V system voltage); float 2.25-2.27V/cell (25°C) + temperature compensation -3.3mV/°C/cell; equalize 2.30-2.35V/cell (once a month, < 24h); max charging current 500A (per PDF spec sheet measured value, use with current limiting) to avoid high-current impact on plates.

2. Installation environment: battery cabinet / rack installation, off the ground ≥ 100mm (moisture protection), off the wall ≥ 50mm (heat dissipation); operating temperature -40°C ~ 65°C (discharge) / -30°C ~ 65°C (charge); forced ventilation cooling required above 45°C; altitude > 3000m, capacity derated 8% per 1000m (GB/T 19638); keep away from heat sources + direct sunlight + corrosive gases.

3. Routine inspection (weekly / monthly for remote sites): check terminal connection torque 10-12 N·m, no looseness / oxidation / overheating (infrared temperature measurement); container inspection for bulging / leakage / cracks (OPzV valve-regulated sealed, normally no leakage); cell voltage deviation < ±0.05V (enter equalize state if exceeded); container temperature vs ambient difference < 5°C (check connections / charging if exceeded).

4. Long-term storage specifications: store fully charged at -25°C ~ 45°C dry, ventilated environment (avoid direct sunlight); boost charge every 3-6 months (constant voltage 2.25-2.27V/cell × 24h); self-discharge rate 2%/month (25°C), capacity test required before reuse if not charged for over 1 year; batteries stored over 2 years are recommended for derated use.

5. Troubleshooting: capacity drop > 20% (vs nominal) — equalize charge 24h to repair, replace if ineffective; abnormal float voltage (> 2.4V or < 2.2V/cell) — check charger + temperature compensation; bulging / leakage / odor — stop use immediately, contact CHISEN after-sales; short circuit / reverse connection — check fuse + polarity marking (red positive, black negative).

6. Activation of first-use / long-term idle batteries: factory new batteries can be installed and operated upon receipt (VRLA valve-regulated sealed, no electrolyte refilling step); batteries idle over 6 months: first discharge at 0.05C small current to 1.80V/cell, then charge per normal charging curve; series banks (48V / 110V / 220V) require "cell matching equalization" before commissioning to ensure cell voltage deviation < 0.05V.

7. Safety precautions: avoid metal tools touching both positive and negative terminals simultaneously (short-circuit current 8300A is lethal); no open flames in charging areas (lead-acid battery charging produces hydrogen, explosion risk with open flame); wear goggles + acid-resistant gloves (electrolyte contains dilute sulfuric acid; flush eyes with clean water for 15 minutes and seek medical attention if splashed); dispose of end-of-life batteries per UN2794 dangerous goods procedures (do not disassemble or spill electrolyte).

• §19 CHISEN Factory Strength + Global Service System (Why Choose Chisen)

CHISEN factory + global service system (why choose Chisen).

1. Factory scale: CHISEN brand established 2002, 20+ years specializing in tubular batteries; 200+ model complete product line covering 2V / 6V / 8V / 12V all voltage levels, capacity 4Ah-3000Ah; mainstream models in stock 100,000+ units (immediate shipment).

2. Global service network: export experience to 60+ countries (China / Southeast Asia / Europe / Africa / Middle East / Latin America / Central Asia / Oceania); industrial projects in telecommunications / power / data centers / PV / railway; 7×24 multilingual technical support (English / Chinese / Spanish / French / Arabic / Russian / Vietnamese); 12h email response / 24h complete quotation / 48h complex project proposal.

3. Quality control: certifications applied per customer requirements (certification items determined by customer); 100% factory inspection before shipment (capacity test + internal resistance test + voltage test + appearance inspection); SPC statistical process control on key processes (plate pasting / group assembly / formation / sealing); cooperation with SGS / TUV / BV / CTI third-party pre-shipment inspection per customer requirements.

4. Export support: first-hand customs documents (commercial invoice / packing list / CO certificate of origin / MSDS / UN2794 transport appraisal / full IEC 60896 test report); multilingual technical documentation (EN / CN / ES / FR / AR / RU); assistance with destination-country special certifications on demand: SONCAP (Nigeria) / PVOC (Kenya) / SASO (Saudi Arabia) / BIS (India) / ESMA (UAE).

5. Long-term cooperation policy: dedicated technical liaison for long-term customers; OEM strategic partners can share sales leads + training support.

6. Sustainability commitment: lead-acid batteries are recyclable; certifications applied per customer requirements (certification items determined by customer); EU RoHS / REACH / WEEE compliance (unrestricted exports to Europe).

• §20 Chisen OPzV2-2000 Contact — Reply within 24 Hours

[CHISEN Battery] 20+ years specializing in tubular battery exports / validated by customers in 60+ countries.

Contact methods:

1. Email inquiry: sales@chisen.cn (complete quotation + sizing proposal within 24h)

2. Phone / WhatsApp: +86 131 6622 6999

3. Website: https://www.chisen.cn