OPzV2-3000 2V3000Ah Tubular Gel Battery: 216V and 380V DC Systems for Utility Storage

Reading time: 17 minutes | For: utility-scale storage procurement, data-centre infrastructure engineering, telecom DC plant design, renewable project development, and battery distributors serving the Gulf, South Asia, Southeast Asia, Africa and Latin America

Answer First

The OPzV2-3000 2V3000Ah is the largest cell in the CHISEN tubular gel range: a 2-volt, 3,000 amp-hour tubular-plate gel VRLA cell with a published weight of 210 kg. It is the building block for 216 V and 380 V DC systems, utility-scale solar and wind storage, large UPS and data-centre backup panels, and unattended telecom plants. Its rating is a 10-hour rate (C10), discharged to 1.80 V per cell, and its maximum charging current of 750 A is the constraint that shapes the whole charge architecture.

Five numbers decide the procurement:

• 3,000 Ah at C10 (10-hour rate, cutoff 1.80 V/cell). The 20-hour rate is not published; a quotation expressing 3,000 Ah at 20 hours describes a different rating basis.
• 576 x 212 x 772 mm, 807 mm over the terminals, 210.0 kg. A 108-cell 216 V string is therefore 22,680 kg of battery and 648 kWh nominal.
• 750 A maximum charging current. On a 108-cell 216 V string that is a charger class of roughly 17.5 MW at the published limit.
• ≥1,500 cycles at 80% depth of discharge, float 2.23 V per cell at 25 °C with a -3 mV per °C compensation, and 0.20 mΩ internal resistance, the lowest in the range.
• Installation permitted vertical, horizontal or on its side, never inverted, no maintenance over the service life, and 2% self-discharge per month with one year of storage without a recharge.

The honest caveat: the OPzV2-3000 2V3000Ah is a float-first cell with a published cycle figure at 80% DOD. A project that discharges the bank daily to 80% is planning against the bottom of that envelope; a project that floats the bank and cycles only for backup is where the 210 kg cell is unambiguously the right choice.

Key Takeaways

1. Bank energy, not cell energy, is what a project buys. At the published OPzV2-3000 capacity, 108 cells carry 648 kWh nominal on a 216 V bus and 190 cells carry 1,140 kWh on a 380 V three-phase DC bus.
2. 3,000 Ah at C10 must be stated in the order. A 20-hour capacity number for a cell of this size looks better on paper and describes a different product.
3. 210 kg per cell makes the battery a structural and logistics item. 22.7 tonnes per 108-cell string, 39.9 tonnes per 190-cell string, with a footprint of 576 x 212 mm per cell.
4. 750 A per cell is the design constraint for the whole plant. At 216 V and 108 cells the charger class is about 17.5 MW, and a PV array of that size needs a controlled charge path rather than a direct connection.
5. The 0.20 mΩ internal resistance is the number that makes a large bank electrically manageable, and it is the figure that should be requested in the certificate rather than assumed.

§1 — OPzV2-3000 2V3000Ah Quick Specifications Table

Every value below is taken from the published CHISEN data sheet for the OPzV2-3000 2V3000Ah.

§2 — The Pain

At 210 kg per cell, the OPzV2-3000 2V3000Ah sits exactly where battery procurement stops being an electrical decision. The engineering risk is no longer the cell; it is everything around it, and the same three failures recur on every project.

The bank configuration is inherited from a smaller project. A buyer who needs 600 kWh chooses the largest cell in the catalogue and repeats it until the energy adds up, without checking whether the resulting panel voltage matches the inverter, the DC bus and the protection. At the published OPzV2-3000 capacity of 3,000 Ah, the difference between 54 cells at 108 V and 108 cells at 216 V is a completely different plant, not a rounding decision.

The charge path is sized from the load instead of the cell. 750 A per cell is the published maximum. An installation that pushes the bank beyond that in the first equalise cycle has a warranty position it does not have, and an installation that stays below it has a charger that never recovers the energy the array puts in.

The logistics plan is written after the purchase order. 210 kg per OPzV2-3000 cell, 576 mm of length and a 39.9 tonne battery bank on a 190-cell string. Container plan, lay-down area, aisle width, floor loading, crane capacity and the time allowed between delivery and the first charge are all consequences of that number, and none of them are in the cell quotation.

The standby case is assumed to be free. Two percent self-discharge per month for the OPzV2-3000, one year of storage without a recharge. On a 108-cell OPzV2-3000 string that is a 39-cell inspection task every quarter, and the inspection has to happen.

§3 — The Choice

The OPzV2-3000 2V3000Ah is the correct cell when the required bank energy is large enough that a smaller cell would need an impractical unit count, and the site is unattended or only occasionally attended. The arithmetic from published figures is:

The 380 V row is the one that changes what a storage project costs: 1.14 MWh on a single bus, 39.9 tonnes of battery, and a 54.2 MW charger class. At that scale, the cell count stops being a detail and becomes the plant.

The second choice is the duty profile, and the published cycle figure makes it quantifiable:

These are arithmetic consequences of published ratings rather than lab results, and the point of the table is the comparison between rows: the same bank gives a 194 kWh working buffer at 30% DOD and a 518 kWh buffer at 80% DOD, and the cycle life the project plans against should come from the row it actually operates in.

The OPzV2-3000 2V3000Ah is better than smaller cells in the same bank because the unit count falls sharply — 108 cells at 216 V instead of several hundred — which cuts the interconnect count, the rack count and the number of points where a cell can fail open-circuit. It is better than a flooded tubular cell of any size because there is no water-refill interval at all, which is what makes it usable for an unattended telecom site, an island or a border post. It is better than a comparable lithium installation for a buyer with no battery management infrastructure, no cell-level shipping documentation and a preference for a float product that sits on float voltage for years without attention.

Against a lithium alternative the comparison is specific:

The OPzV2-3000 2V3000Ah is better than a lithium bank where the site has no BMS competence, because the gel cell’s behaviour is defined by a float voltage, a temperature compensation coefficient and a published charge-current limit that any competent charger can honour. It is worse on cycle life and on capital cost, and for a utility-scale plant that cycles daily those two items decide the answer on their own.

For the wider programme, the tubular gel OPzV range shows the capacity ladder the OPzV2-3000 belongs to, and the solar battery range covers the PV-linked configurations where the 216 V and 380 V banks are most often specified.

§4 — The Framework

Seven criteria decide whether the OPzV2-3000 2V3000Ah is right for a specific project, and each one removes a class of error the next one cannot repair.

1. Set the bank voltage before the cell count. 48 V, 108 V, 216 V or 380 V. The bus voltage fixes the charger, the DC bus, the protection, the string fuses, the inverter window and the earthing design.
2. State the rating basis. 3,000 Ah at C10 to 1.80 V per cell, written into the order, the certificate requirement and the warranty.
3. Design the charge path around 750 A per cell. At 216 V and 108 cells that is 17.5 MW at the published limit. The array, the charger and the charge-control strategy have to be designed together.
4. Model the real depth of discharge. The published ≥1,500 cycles at 80% DOD is the planning figure for a project that genuinely cycles that deep. Work from the site’s load profile, not from the rated capacity.
5. Treat the battery as a structural and logistics item. 210 kg per cell, 576 x 212 mm footprint, 807 mm over the terminals, 22.7 tonnes per 108-cell bank. Floor loading, aisle width, lifting method, lay-down area and the container plan belong inside the engineering package.
6. Check the environment against the published limits. Discharge -40 to +65 °C, charge -30 to +65 °C, storage -25 to +45 °C, and 2% self-discharge per month with one year of storage without a recharge.
7. Write the standby discipline into the maintenance plan. A boost charge every three to six months for any bank in storage, and a scheduled inspection of a 108-cell string that must reach every cell.

§5 — The Trust

The OPzV2-3000 2V3000Ah is a conventional industrial cell with a well-understood failure pattern. The traps at this size are commercial and logistical.

Ask for the capacity basis and the discharge curve. A “3,000 Ah” quoted without a rate and a cutoff is not a specification, and at this capacity the difference between a C10 and a C20 basis is commercially material.

Ask for the certificate on internal resistance and charge current for the OPzV2-3000. 0.20 mOhm and 750 A are published for the OPzV2-3000. They are also the two numbers that decide whether the charger and the protection design works, and they should arrive as test data rather than as brochure figures.

Ask for the cycle test profile. The depth of discharge, cutoff voltage, temperature and charge regime behind “>=1,500 cycles at 80% DOD”.

Verify the weight against the drawing. 210.0 kg filled with electrolyte is published for the OPzV2-3000. A quotation at a materially different weight describes a different cell, and a rack designed to the wrong weight is a structural problem with a safety dimension.

Confirm the construction and the electrolyte. Tubular positive plate, nano gel electrolyte and a valve-regulated sealed structure are what make the maintenance-free and multi-orientation claims true.

Check the warranty at the operating point. Float life at 20 °C is the published claim. Ask what it becomes at 40 °C ambient, at 80% DOD cycling, at high altitude, and after a bank that has been stored for nine months without a boost charge.

Demand a bank-level failure procedure. On a 108-cell OPzV2-3000 series bank, one weak cell determines the capacity of the entire system. Ask how the site identifies a weak cell, whether single-cell test fixtures are supplied, and whether the warranty survives a partial replacement.

Fix the logistics contract. Container plan for the OPzV2-3000 at 22.7 tonnes per 108-cell bank, lay-down area, lifting equipment, maximum time between delivery and the first full charge, and the storage temperature limit of -25 to +45 °C for any bank held at the port in Mumbai, Mombasa, Lagos, Santos, Jebel Ali or Port Said.

§6 — FAQ

Q1. What is the rated capacity of the OPzV2-3000 2V3000Ah? 3,000 Ah at the 10-hour rate with a 1.80 V per cell cutoff. The 20-hour rate is not published for this cell, so treat any 20-hour capacity figure for the same case as a different rating basis and request the discharge curve before comparing quotations.

Q2. How many cells make a 216 V system and how much do they weigh? 108 cells in series, giving 108 x 2 V x 3,000 Ah = 648 kWh nominal and 108 x 210.0 kg = 22,680 kg of battery. The published configuration band also covers 24 cells for 48 V, 54 for 108 V and 190 for 380 V three-phase DC.

Q3. What charger does a 216 V bank of these cells need? At the published maximum charge current of 750 A per cell, a 108-cell bank draws 81,000 A at 216 V, a charger class of roughly 17.5 MW. Float is 2.23 V per cell at 25 °C with -3 mV per °C compensation, and the equalise stage must respect that compensation.

Q4. Can the OPzV2-3000 be installed horizontally? Yes. The sealed gel construction allows vertical, horizontal or side installation, but never inverted, because the gel must remain in contact with the plates. That flexibility matters in retrofit projects where the rack pitch was designed for flooded cells.

Q5. How long does it last on float, and how does that compare with cycling? The published float design life for the range is 20 years or more at 20 °C with a float voltage of 2.23 V per cell, and the published cycling figure is >=1,500 cycles at 80% DOD. A project that floats the bank with occasional backup discharge will use a small fraction of that cycle life; a project that discharges to 80% every day is planning on the full 1,500 cycles, roughly five years at 300 cycles a year.

Q6. What is the internal resistance, and why does it matter at this size? 0.20 mOhm fully charged at 25 °C, the lowest in the range. On a 108-cell bank the series resistance is the dominant factor in the voltage drop during a high-current discharge, so the value has to be in the certificate and in the protection study rather than assumed.

Q7. Can the battery be stored for a year? The published data allows up to one year of storage without recharging at 25 °C, with self-discharge of 2% per month, and a boost charge every three to six months. For a bank delivered to Mombasa, Lagos, Santos or Jebel Ali with a long customs or site delay, plan the boost charge into the schedule.

Q8. What are the temperature limits? Discharge -40 to +65 °C, charge -30 to +65 °C, storage -25 to +45 °C. The charge ceiling matters in an unconditioned container in the Gulf, in northern India or in a summer in southern Europe, where an equalise cycle can push the internal temperature of the cell above the published limit if the room is not shaded and ventilated.

Q9. What should be in the purchase order? The model, the capacity and its basis (3,000 Ah at C10 to 1.80 V/cell), float and equalise voltages with the temperature compensation, the 750 A maximum charging current, the 0.20 mOhm internal resistance figure, the cycle life with its depth of discharge, the operating temperature range, the storage and boost-charge requirement, the installation orientation rules, the filled weight and dimensions, the applicable standards, and the warranty terms at cell and bank level with a named local claim contact.

Expert Summary

The OPzV2-3000 2V3000Ah is the largest cell in the CHISEN tubular gel range: a 2 V, 3,000 Ah tubular-plate gel VRLA cell for 216 V and 380 V DC systems, utility-scale solar and wind storage, large UPS, data-centre backup panels and unattended telecom plants. The decisive published specification is that 3,000 Ah is a 10-hour rate to a 1.80 V per cell cutoff, so every quotation, certificate and warranty must state the basis, because a 20-hour figure for the same case describes a cell with different usable energy at the rates a backup system actually sees. The cell measures 576 x 212 x 772 mm, 807 mm over the terminals, weighs 210.0 kg filled with electrolyte, carries a Phi20-M8 terminal with a 10-12 N.m torque, publishes at least 1,500 cycles at 80% DOD, floats at 2.23 V per cell at 25 °C with a -3 mV per °C compensation, accepts a maximum charge current of 750 A, has 0.20 mOhm internal resistance, self-discharges at 2% per month with one year of storage without recharge, operates -40 to +65 °C on discharge and -30 to +65 °C on charge, stores between -25 and +45 °C, installs vertical, horizontal or on its side but never inverted, and needs no maintenance. Bank arithmetic follows directly: 24 cells give 48 V at 144 kWh and 5,040 kg, 54 cells give 108 V at 324 kWh and 11,340 kg, 108 cells give 216 V at 648 kWh and 22,680 kg, and 190 cells give 380 V at 1,140 kWh and 39,900 kg, with charger class at the published limit running from 864 kW to 54.2 MW. Against a comparable LFP installation, the gel cell offers lower capital cost, no battery management system and no cell-level shipping documentation, while lithium offers 3,000-5,000 cycles at 80% DOD and materially lower installation weight. The non-negotiables are the bank voltage fixed before the cell count, the C10 basis in writing, a charge path designed around 750 A per cell, a depth-of-discharge model taken from the real load profile, the certificate values for internal resistance and charge current, and an installation logistics plan built around 210 kg per cell and 22.7 tonnes per 108-cell bank.

Contact CHISEN — 24-Hour Response

CHISEN replies to technical and commercial enquiries within 24 hours and returns a written sizing recommendation with published data, not a catalogue listing.

Send us the information below and we will return the bank configuration, charger class, float and equalise settings and the logistics plan for the OPzV2-3000 2V3000Ah in your project:

• Bank voltage and the duty profile, including the expected depth of discharge and cycle frequency
• Site altitude and the ambient temperature range, and whether the battery room is conditioned
• Available charger class, the array peak output, and the intended charge control strategy
• Whether the site is attended or unmanned, and the service interval you can support
• Annual volume, delivery terms and destination port

Email: sales@chisen.cn WhatsApp: +86 131 6622 6999 Call: +86 131 6622 6999

Related reading: OPzV2-3000 2V3000Ah product specifications · Tubular gel OPzV range and bank configurations · Solar battery systems for utility-scale PV storage

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CHISEN Battery Team

Engineering and export team at CHISEN Battery, Hangzhou, China. Lead-acid and lithium battery manufacturer, ISO 9001 / CE / UL certified, exporting to 50+ countries.

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