Reading time: 13 minutes. For B2B procurement engineers, telecom power designers, solar EPC contractors and industrial distributors comparing a 2 V 250 Ah tubular gel cell against the data a manufacturer actually publishes.
Answer First
The OPzV2-250 2V250Ah is a 2 V, 250 Ah tubular-plate gel valve-regulated stationary cell published by CHISEN for telecom base-station backup, mid-size UPS cabinets and solar and wind storage strings. The decisive figures are: 250 Ah at the C10 rate, a 2.23 V float charge voltage at 25 °C, a 2.35 V equalise voltage at 25 °C, −3 mV/°C/cell temperature compensation, a designed float life of 20+ years at 20 °C, and a 124 × 206 × 354 mm case weighing 20.0 kg with a female M8 copper insert torqued to 10–12 N·m. In a 24-cell 48 V bank the OPzV2-250 gives 24 × 2 V × 250 Ah = 12 kWh of stored energy, 24 × 20.0 kg = 480.0 kg of cells, 24 × 0.7 mΩ = 16.8 mΩ of string resistance and 24 × 63 A = 1,512 A of charge headroom. Every figure below is read from the manufacturer’s datasheet and model page.
Key Takeaways
- The OPzV2-250 2V250Ah is a 2 V cell, not a 48 V pack. Twenty-four make a nominal 48 V DC bus. Buyers who order “a 250 Ah battery” for a 48 V cabinet and receive 2 V cells lose a month of programme time.
- Float 2.23 V, equalise 2.35 V, compensation −3 mV/°C/cell, float life 20+ years at 20 °C decide whether the OPzV2-250 reaches its published life. They are also the four figures most often quoted wrongly.
- The solar and wind recipe is a separate table. The datasheet’s solar/wind block uses a 2.27 ± 0.005 V float setting and a 2.40 ± 0.01 V regulation voltage, the array reconnecting at 2.23 ± 0.005 V and the load disconnecting at 1.90 ± 0.005 V. That is a different controller profile, not a contradiction.
- Mechanically the OPzV2-250 is a 20 kg lifting job. Twenty-four cells are 480.0 kg and a 48-cell string is 960.0 kg — decisive for container fill, drayage and floor loading from Ningbo, Shanghai or Shenzhen to Lagos, Mombasa, Durban, Karachi, Chennai, Dubai, Jebel Ali, Port Said, Santos, Callao, Rotterdam, Hamburg, Valencia or Port Adelaide.
- Charge headroom is 63 A per cell. A charger above that risks excess plate heating; a charger below 0.15 C_A — 0.15 × 250 Ah = 37.5 A — will not recover a deep-discharged string in the control window.
- 250 Ah is the logistics sweet spot between 200 Ah and 500 Ah: a 48 V 12 kWh string two installers can handle, rather than the 24 kWh and 871.2 kg of a 500 Ah bank.
§1 — OPzV2-250 2V250Ah Quick Specifications Table
This is the OPzV2-250 2V250Ah reference data set: ratings from the model page, charging and float behaviour from the datasheet, derived values marked as arithmetic. The source column tells an auditor which document to request.
| Parameter | Value | Source |
|---|
| Model | OPzV2-250, tubular-plate gel stationary cell, 2 V 250 Ah | Model page |
| Nominal voltage | 2 V | Model page |
| Nominal capacity | 250 Ah at C10 (10-hour rate) to 1.80 V/cell | Model page |
| C10 discharge current | 25 A (250 Ah ÷ 10 h) | Arithmetic |
| Dimensions (L × W × H) | 124 mm × 206 mm × 354 mm | Model page |
| Total height over terminals | 390 mm | Model page |
| Weight, filled with electrolyte | 20.0 kg (44.1 lbs) | Model page |
| Internal resistance | approx. 0.7 mΩ (fully charged at 25 °C) | Model page |
| Maximum charge current | 63 A | Model page |
| Maximum discharge current (5 s) | 625 A | Model page |
| Short circuit current | 2300 A | Model page |
| Float charge voltage | 2.23 V @ 25 °C | Datasheet |
| Equalise charge voltage | 2.35 V @ 25 °C | Datasheet |
| Designed float life | 20+ years at 20 °C | Datasheet |
| Temperature compensation | −3 mV/°C/cell | Datasheet |
| Self-discharge | approx. 2 % per month @ 20 °C | Datasheet |
| Container material | SAN | Datasheet |
| Terminal | Female copper insert M8, torque 10–12 N·m | Datasheet |
| Ambient range — discharge | −40 °C to 65 °C | Model page |
| Ambient range — charge | −30 °C to 65 °C | Model page |
| Ambient range — storage | −25 °C to 45 °C | Model page |
| Cycle life | ≥ 1500 cycles at 80 % depth of discharge | Model page |
| Float test procedure | 20–25 °C, discharge at 0.25 C_A, cut-off 1.75 V/cell, end of life ≤ 60 % of nominal capacity | Datasheet |
| Constant-charge condition | 0.15 C_A to 2.40 V at 20 °C | Datasheet |
| Capacity-test charge voltage | 2.35 V/cell at 25 °C ambient | Datasheet |
| Nominal energy per cell | 500 Wh (2 V × 250 Ah) | Arithmetic |
| Mass energy density | 25.0 Wh/kg (500 Wh ÷ 20.0 kg) | Arithmetic |
Four rows need explanation before a purchase order is signed.
Float 2.23 V @ 25 °C. The OPzV2-250 sits on this voltage for most of its life, and the datasheet’s float-life curve is plotted for exactly this value. Higher accelerates plate corrosion; lower lets the string sag into sulphation. The value is per cell, so a 24-cell string floats at 24 × 2.23 V = 53.52 V, not 48 V.
Equalise 2.35 V @ 25 °C. The recovery voltage used to rebalance cells that have drifted apart in service. It is a maintenance action, not a float condition, and it sits 0.12 V per cell above float: 24 × (2.35 V − 2.23 V) = 2.88 V of extra bus voltage that a float-only charger will not produce.
Designed float life 20+ years at 20 °C. The reference temperature is 20 °C, and the datasheet’s temperature-versus-float-life chart turns that headline into a cabinet decision. A cabinet running at 30 °C consumes a large part of the design life, which is why ventilated enclosures in Nigeria, Kenya, South Africa, Egypt, Saudi Arabia and the Gulf states are not optional.
Temperature compensation −3 mV/°C/cell. Worked at real cabinet temperature: at 35 °C the float setting becomes 2.23 V − (10 °C × 0.003 V/°C) = 2.20 V per cell, so 24 × 2.20 V = 52.80 V across the string; at 15 °C it becomes 2.23 V + (10 °C × 0.003 V/°C) = 2.26 V per cell, so 24 × 2.26 V = 54.24 V. Commission the charger with compensation disabled in a hot cabinet and you stress the OPzV2-250 string exactly where life is already shortest.
§2 — The Pain
The problem is not finding a 2 V 250 Ah cell. It is finding one whose published numbers survive contact with a real cabinet.
Capacity is the least informative figure on the sheet. A 250 Ah rating means 250 Ah over ten hours, at the C10 rate, down to 1.80 V/cell. It says nothing about the float voltage the cell is held at, the charge current ceiling, the internal resistance that sets the sag under a UPS step load, or the temperature at which the claim was measured. When a buyer in Mumbai or Chennai compares three offers for “2 V 250 Ah gel”, the useful questions are always on the OPzV2-250 datasheet: 2.23 V or another figure? 63 A or 75 A? 0.7 mΩ or 1.1 mΩ? The answer decides whether the string survives its first summer.
The second pain is drift between documents: one supplier publishes a float band centred above 2.23 V, another publishes 2.23 V, and the float life is attached to 25 °C by one maker and 20 °C by another. A 40 mV per-cell float error across 24 cells is 0.96 V of bus error, and a 0.3 mV/°C compensation error across a 15 °C cabinet swing is 0.108 V per cell of accumulated error over one season. A file that cannot state one number per parameter fails at acceptance testing, and the dispute lands on whoever cannot evidence the OPzV2-250 figures.
The third pain is that tubular gel cells are heavy and the industry treats them as though they were not. At 20.0 kg per cell, a 24-cell string is 480.0 kg and a 48-cell string is 960.0 kg. Port handling at Lagos or Mombasa, drayage in Durban, customs inspection in Karachi or Chennai, and the Jebel Ali and Port Said re-export routes all turn on declared weight and container fill rate. A cabinet that must carry 480 kg of cells also needs a floor load check, and each OPzV2-250 has to pass through a 206 mm wide door.
The fourth pain is the solar and wind charge profile. A telecom float charger and a photovoltaic controller are set to different voltages, and a buyer who applies a float-only profile to an off-grid string ends up with a battery living in absorption instead of float. The datasheet therefore carries a separate solar and wind parameter table, and the correct response is to configure the controller to that table rather than to average the two.
§3 — The Choice
Once the cell is chosen, the next decision is whether 250 Ah is the right point on the range. The CHISEN OPzV gel range publishes different case formats at different capacities, and the shell dimensions differ measurably across the line, so a cabinet designed for one model does not accept another without a re-check.
| Model | Voltage | Capacity | Dimensions L×W×H (mm) | Weight | Internal resistance | Max. charge current | Source |
|---|
| OPzV2-250 | 2 V | 250 Ah | 124 × 206 × 354 | 20.0 kg (44.1 lbs) | 0.7 mΩ @ 25 °C | 63 A | Model page |
| OPzV2-500 | 2 V | 500 Ah | 166 × 206 × 506 | 36.3 kg (80.0 lbs) | 0.56 mΩ @ 25 °C | 100 A | Datasheet |
| OPzV2-700 | 2 V | 700 Ah | 254 × 210 × 506 | 51.0 kg (112.5 lbs) | 0.55 mΩ @ 25 °C | 140 A | Datasheet |
| OPzV2-1000 | 2 V | 1000 Ah | 233 × 210 × 681 | 73.2 kg (161.4 lbs) | 0.5 mΩ @ 25 °C | 200 A | Datasheet |
| OPzV2-1500 | 2 V | 1500 Ah | 275 × 210 × 831 | 102 kg (225 lbs) | 0.45 mΩ @ 25 °C | 300 A | Datasheet |
| OPzV2-2500 | 2 V | 2500 Ah | 487 × 212 × 807 | 181 kg (399 lbs) | 0.3 mΩ @ 25 °C | 500 A | Datasheet |
The 24-cell arithmetic below is what a 48 V DC project actually consumes, and it is the number that must fit inside a container, a truck and a floor.
| Model | 24 × weight | 24 × internal resistance | 24 × max charge current | Nominal energy per cell | Source |
|---|
| OPzV2-250 | 24 × 20.0 kg = 480.0 kg | 24 × 0.7 mΩ = 16.8 mΩ | 24 × 63 A = 1,512 A | 2 V × 250 Ah = 500 Wh | Arithmetic |
| OPzV2-500 | 24 × 36.3 kg = 871.2 kg | 24 × 0.56 mΩ = 13.44 mΩ | 24 × 100 A = 2,400 A | 2 V × 500 Ah = 1,000 Wh | Arithmetic |
| OPzV2-700 | 24 × 51.0 kg = 1,224.0 kg | 24 × 0.55 mΩ = 13.20 mΩ | 24 × 140 A = 3,360 A | 2 V × 700 Ah = 1,400 Wh | Arithmetic |
| OPzV2-1000 | 24 × 73.2 kg = 1,756.8 kg | 24 × 0.50 mΩ = 12.00 mΩ | 24 × 200 A = 4,800 A | 2 V × 1,000 Ah = 2,000 Wh | Arithmetic |
| OPzV2-1500 | 24 × 102 kg = 2,448.0 kg | 24 × 0.45 mΩ = 10.80 mΩ | 24 × 300 A = 7,200 A | 2 V × 1,500 Ah = 3,000 Wh | Arithmetic |
| OPzV2-2500 | 24 × 181 kg = 4,344.0 kg | 24 × 0.30 mΩ = 7.20 mΩ | 24 × 500 A = 12,000 A | 2 V × 2,500 Ah = 5,000 Wh | Arithmetic |
Read across those two tables and the trade-off is clear. The OPzV2-250 gives a 12 kWh string at 480.0 kg, a mass energy density of 25.0 Wh/kg and a string resistance of 16.8 mΩ. A 500 Ah cell gives 24 kWh at 871.2 kg and 27.5 Wh/kg — roughly 82 % heavier for twice the energy. Above 1000 Ah mass becomes the dominant constraint: 1,756.8 kg for a 24-cell bank means a craned cabinet, not a hand-carried enclosure.
For one telecom base station in Nigeria or Kenya, or a small solar station in Vietnam or the Philippines, 250 Ah is normally right: 24 cells, 12 kWh, 480.0 kg, and a string two installers can carry into a standard outdoor enclosure. The OPzV2-500 2V500Ah cell page covers the step up, and the OPzV tubular gel range index lists the full published range with the case dimensions that make those comparisons honest.
§4 — The Framework
Six checks, each anchored to a published number, decide whether a 250 Ah string is specified correctly.
Check 1 — Fix the bus, then the series count. Twenty-four OPzV2-250 cells make a nominal 48 V system; the float string runs at 24 × 2.23 V = 53.52 V and the equalise string at 24 × 2.35 V = 56.40 V. Size the charger, the bus bars and the DC distribution for 56.40 V, not for 48 V.
Check 2 — Confirm capacity against the discharge end-voltage table. The datasheet ties the final voltage to the discharge rate, and the C10 current of the OPzV2-250 is 25 A. Because 0.08 C = 0.08 × 250 Ah = 20 A and 0.2 C = 50 A, the 25 A C10 discharge falls in the 0.08 C ≤ I < 0.2 C band, so the string may be taken to 1.80 V/cell and no lower.
| Discharge current I | Final voltage | Reading for a 250 Ah cell | Source |
|---|
| I < 0.05 C | ≥ 1.90 V/cell | below 12.5 A — monitoring and trickle duty only | Datasheet |
| 0.05 C ≤ I < 0.08 C | ≥ 1.85 V/cell | 12.5 A to 20 A — light float backup | Datasheet |
| 0.08 C ≤ I < 0.2 C | ≥ 1.80 V/cell | 20 A to 50 A — the C10 band, 25 A sits here | Datasheet |
| 0.2 C ≤ I < 0.6 C | ≥ 1.75 V/cell | 50 A to 150 A — five-hour duty | Datasheet |
| 0.6 C ≤ I < 1.0 C | ≥ 1.70 V/cell | 150 A to 250 A — one-hour duty | Datasheet |
| 1 C ≤ I ≤ 2 C | ≥ 1.60 V/cell | 250 A to 500 A — high-current pulse discharge | Datasheet |
Check 3 — Set the charger to the published profile, then to the solar profile if the site has one. The standard profile is float 2.23 V, equalise 2.35 V, compensation −3 mV/°C/cell, a 63 A ceiling and a constant charge of 0.15 C_A to 2.40 V at 20 °C, which for the OPzV2-250 is 0.15 × 250 Ah = 37.5 A. The solar and wind table is a separate controller profile, configured as printed.
| Solar and wind setting | Value | Source |
|---|
| Over voltage disconnect | 2.47 ± 0.01 V/cell @ 25 °C | Datasheet |
| Regulation / equalise voltage | 2.40 ± 0.01 V/cell @ 25 °C | Datasheet |
| Array reconnection voltage | 2.23 ± 0.005 V/cell @ 25 °C | Datasheet |
| Float voltage setting | 2.27 ± 0.005 V/cell @ 25 °C | Datasheet |
| Low voltage alarm | 1.95 ± 0.005 V/cell @ 25 °C | Datasheet |
| Low voltage disconnect | 1.90 ± 0.005 V/cell @ 25 °C | Datasheet |
| Load reconnect voltage | 2.09 ± 0.01 V/cell @ 25 °C | Datasheet |
| Temperature compensation coefficient | −3 ~ −5 mV/cell/°C | Datasheet |
| Charge condition | Constant charge 0.15 C_A to 2.40 V at 20 °C | Datasheet |
Read the two tables together and the logic is consistent. The 2.23 V float setpoint at 25 °C applies to grid-backed float service with a temperature-compensated charger. The solar profile sits float at 2.27 ± 0.005 V because a photovoltaic controller has no mains reference, and it separates the regulation stage at 2.40 ± 0.01 V from float so the controller can harvest the remaining array energy. The array reconnects at 2.23 ± 0.005 V, the load disconnects at 1.90 ± 0.005 V and reconnects at 2.09 ± 0.01 V.
Check 4 — Match charger current to the cell, not to the string. The ceiling is 63 A per OPzV2-250 cell and the constant-charge figure is 37.5 A, so a 24-cell string needs a charger able to deliver around 24 × 37.5 A = 900 A on the constant-charge leg while the rectifier is sized for the 56.40 V equalise level.
Check 5 — Check the mechanical and thermal envelope. 124 mm × 206 mm × 354 mm of case, 390 mm over the terminals, 20.0 kg per cell, so a 24-cell cabinet carries 480.0 kg of cells plus its own mass and needs ventilation clearance around each cell. The discharge window of −40 °C to 65 °C, the charge window of −30 °C to 65 °C and the storage window of −25 °C to 45 °C define the envelope: charging is the restricted leg, which is why a tropical site in Nigeria, Indonesia or Bangladesh must be ventilated even though discharge runs happily at 40 °C. Cabinet ventilation volume per cell is a specification to be requested from the factory.
Check 6 — Match the duty cycle to the life curve. Published cycle life is ≥ 1500 cycles at 80 % depth of discharge, and the datasheet’s cycle-life-versus-depth-of-discharge curve falls away steeply as depth increases, so a daily-cycled solar string must be sized on the shallow part of that curve. The float test procedure defines acceptance: 20–25 °C, discharge at 0.25 C_A — 62.5 A for this cell — cut-off at 1.75 V/cell, and end of life declared at 60 % or less of nominal capacity.
§5 — The Trust
A cell datasheet is worth only what its test regime and certificate trail are worth. The OPzV2-250 2V250Ah is built to a stationary valve-regulated standard set, and the buyer should request the certificates rather than accept a catalogue claim.
| Standard | Number | What the buyer uses it for | Source |
|---|
| International IEC | IEC 60896-21/22 | Stationary valve-regulated batteries — test methods, dimensions, terminals, marking | Model page |
| Photovoltaic | IEC 61427 | Mandatory reference for solar and wind storage bids | Model page |
| German DIN | DIN 40472 | Tubular valve-regulated cell construction and dimensions | Model page |
| Chinese national | GB/T 19638.1 | Stationary valve-regulated batteries, domestic market compliance | Model page |
| Telecom | YD/T 1360 | Operator backup power specification for tender submissions | Model page |
| Eurobat long-life guide | Eurobat | Float life classification used by European buyers | Model page |
| UK and North America | BS 6290 Part 4 / UL 1989 | Access to the UK and North American stationary markets | Model page |
The second half of trust is documentation discipline. Before the order is placed, request the technical data sheet for the exact model, the production lot test report, the safety data sheet and the UN2794 transport appraisal, the certificate of origin and the packing list, plus a container fill calculation proving declared weight and volume agree. If a supplier cannot evidence a specific figure — cabinet ventilation rate, cell-to-cell matching tolerance, or the maximum permitted cell voltage deviation in a new string — the honest answer is a specification to be requested from the factory, not an estimate that later fails an acceptance test.
Third-party inspection is available on request through SGS, TUV, BV and CTI, and destination-country approvals such as SONCAP for Nigeria, PVOC for Kenya, SASO for Saudi Arabia, BIS for India and ESMA for the UAE can be arranged against the shipment rather than after it. For a 480.0 kg OPzV2-250 string leaving Ningbo or Shanghai, the pallet count and the cell count on the packing list must agree.
Two caveats belong in the file. First, the float-life curve is the reference for the 2.23 V per cell condition, and a cabinet running at 30 °C rather than 20 °C will not reach the 20+ years figure — the curve is the instrument for that judgement, not the headline. Second, ≥ 1500 cycles at 80 % depth of discharge is a laboratory figure obtained under IEC 60896-21 test conditions at 25 °C; a site cycling daily at 30 °C will not see it.
§6 — FAQ
Q1. What exactly is the OPzV2-250 2V250Ah, and where does the 250 Ah figure come from? The OPzV2-250 2V250Ah is a single 2 V stationary cell with a tubular positive plate and immobilised gel electrolyte in a valve-regulated sealed case. The 250 Ah rating is the capacity at the C10 rate: 250 Ah delivered over ten hours down to 1.80 V per cell, which corresponds to 25 A because 250 Ah ÷ 10 h = 25 A. Twenty-four cells in series give a nominal 48 V system holding 12 kWh.
Q2. Does the OPzV2-250 need a different charger setting for solar and wind than for telecom float? Yes. The standard profile is float 2.23 V and equalise 2.35 V at 25 °C with −3 mV/°C/cell compensation. The datasheet’s solar and wind table is a separate controller profile: float 2.27 ± 0.005 V/cell, regulation 2.40 ± 0.01 V/cell, over-voltage disconnect 2.47 ± 0.01 V/cell, array reconnection 2.23 ± 0.005 V/cell, alarm 1.95 ± 0.005 V/cell, disconnect 1.90 ± 0.005 V/cell and load reconnect 2.09 ± 0.01 V/cell. Both are printed on the same page; they serve different duties and are not in conflict.
Q3. How many OPzV2-250 cells make a 48 V system, and what does the string weigh? Twenty-four cells in series. The string weighs 24 × 20.0 kg = 480.0 kg, holds 24 × 2 V × 250 Ah = 12 kWh, presents 24 × 0.7 mΩ = 16.8 mΩ of string resistance and carries 24 × 63 A = 1,512 A of combined charge current. A 48-cell string at 96 V doubles those figures to 960.0 kg and 24 kWh. Both determine container space, floor loading and handling method before a single cell is ordered.
Q4. Can the OPzV2-250 be installed where cabinet space is tight? The case is 124 mm × 206 mm × 354 mm with a total height of 390 mm over the terminals, so the footprint is small relative to its 500 Wh of stored energy. Because the OPzV2-250 is a sealed valve-regulated gel cell there is no electrolyte to spill, but the permitted mounting method, the clearance for ventilation and the minimum spacing are a specification to be requested from the factory for your enclosure.
Q5. How long will the OPzV2-250 last in service, and what shortens that? The designed float life is 20+ years at 20 °C under float, and the datasheet’s temperature-versus-float-life graph for the 2.23 V per cell condition adjusts that figure to a real cabinet. Higher cabinet temperature, a float voltage above 2.23 V, missing temperature compensation and repeated deep discharge below the end-voltage limits all consume design life. On cycling, the published figure is ≥ 1500 cycles at 80 % depth of discharge under IEC 60896-21 test conditions at 25 °C.
Q6. What should be checked when the OPzV2-250 arrives, before it enters the string? Check the cell voltage spread across the delivered lot, because a new string should be equalised so that cell deviation stays inside the manufacturer’s stated tolerance — a specification to be requested from the factory. Confirm terminal torque at 10–12 N·m on the M8 female copper insert, confirm the string floats at 24 × 2.23 V = 53.52 V with compensation active, and record the cabinet temperature. Self-discharge is approximately 2 % per month at 20 °C, so cells stored for more than a few months should be recharged and capacity-checked rather than commissioned as received.
Expert Summary
The OPzV2-250 2V250Ah is a 2 V, 250 Ah tubular-plate gel valve-regulated stationary cell with a 20+ year float design life at 20 °C, a float voltage of 2.23 V and an equalise voltage of 2.35 V at 25 °C, temperature compensation of −3 mV/°C/cell, and a 124 × 206 × 354 mm case weighing 20.0 kg with a female M8 copper insert torqued to 10–12 N·m. In a 24-cell 48 V string that is 12 kWh, 480.0 kg, 16.8 mΩ and a 1,512 A combined charge ceiling. The buyer’s decision is not about the 250 Ah number itself but about the four setpoints around it, the 63 A charge ceiling, the solar and wind controller profile printed separately in the datasheet, and the mechanical envelope that must survive a 480 kg string arriving in Lagos, Mombasa, Karachi, Chennai, Jebel Ali, Port Said, Santos or Rotterdam.
Contact CHISEN — 24-Hour Response
To receive a complete quotation and sizing sheet for the OPzV2-250 2V250Ah, send the following to sales@chisen.cn:
- Application — telecom base station, UPS cabinet, solar or wind storage, rail signalling, or substation DC.
- Bus voltage and topology — nominal DC bus, cells in series, and parallel strings if capacity must be increased.
- Required capacity and duty — load in watts, autonomy in hours, and the expected discharge rate.
- Quantity — sample, project volume, or repeat replenishment.
- Destination port — for example Lagos, Mombasa, Durban, Karachi, Chennai, Mumbai, Jebel Ali, Port Said, Santos, Callao, Rotterdam, Hamburg, Valencia or Port Adelaide — with the preferred Incoterm.
- Documentation — technical data sheet, MSDS, UN2794 transport appraisal, certificate of origin, and any destination-country certification such as SONCAP, PVOC, SASO, BIS or ESMA.
CHISEN replies with a sizing sheet and an itemised quotation within 24 hours and can arrange third-party pre-shipment inspection through SGS, TUV, BV or CTI. Full technical data for this cell sits on the OPzV2-250 2V250Ah product page, and the wider tubular gel range is published in the OPzV section of the English site. The full portfolio of articles, product data and buyer guides is published at leadacidbattery.cn.
Document version: 2026-09-28 | CHISEN Battery Co., Ltd. | Hangzhou, China | sales@chisen.cn | +86 131 6622 6999
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