OPzV2-250 2V250Ah Tubular Gel Battery — Complete Industrial Buyer’s Guide for Telecom / UPS / Solar Backup (2026)

Reading time: 18 minutes | Target audience: B2B procurement engineers, telecom power designers, solar EPC contractors, industrial distributors

Key Takeaways (TL;DR)

1. OPzV2-250 2V250Ah is a 2V 250Ah tubular gel VRLA battery designed for mid-capacity backup power (telecom base stations, UPS, off-grid PV) with 20+ year float design life.
2. CHISEN OPzV2-250 follows DIN 40472 + IEC 60896-21/22 standards, ships from a 100,000+ cell factory, exports to 60+ countries.
3. Tubular positive plate + nano-gel electrolyte gives ≥ 1500 cycles @ 80% DOD — 1.5-2× the cycle life of flat-plate AGM at the same capacity.
4. Maintenance-free (no water refill) + 48V/110V/220V/380V series compatibility cuts lifetime O&M cost 30-40% vs flooded OPzS.
5. CHISEN factory-direct pricing: free selection tool, 24h quotation, OEM/ODM supported, FOB/CIF/DDP shipping to 60+ countries.

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§1 Product Definition — What is CHISEN OPzV2-250 2V250Ah?

CHISEN OPzV2-250 is a 2V 250Ah tubular positive plate + nano gel electrolyte + valve-regulated sealed lead-acid cell, certified to IEC 60896-21/22 + DIN 40472 + GB/T 19638 standards.

Model decoding (DIN 40472 standard):

• OPz = Ortsfeste Panzerplatten (German for “stationary tubular armored plate”) — confirms tubular plate construction
• V = Valve Regulated (sealed, gel-immobilized electrolyte)
• 2 = 2V nominal cell voltage (24 cells → 48V system; 54 cells → 108V / 110V DC; 108 cells → 216V / 220V DC; 190 cells → 380V 3-phase DC)
• 250 = 250Ah rated capacity at C10 discharge rate (10-hour rate to 1.80V/cell)

Why “250Ah”? The sweet spot for mid-scale telecom and solar. 250Ah is the most-requested mid-capacity cell because it lets you build 48V systems at 250Ah (12kWh), 110V DC panels at 250Ah (27.5kWh), and 220V industrial DC at 250Ah (55kWh) — without the size/weight penalty of 500Ah+ cells and without the high cell-count cost of 100Ah cells.

Spec snapshot (CHISEN datasheet §2):

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§2 CHISEN OPzV2-250 30-Second Quick Reference

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§3 Model Naming Rules — OPzV vs OPzS vs AGM (DIN 40472 vs DIN 40736-1)

CHISEN OPzV2-250 naming follows German DIN 40472 (tubular valve-regulated gel) + international IEC 60896 standard. OPz is the German abbreviation of “Ortsfeste Panzerplatten” — meaning “stationary tubular armored plate” — confirming the tubular positive plate construction (the core of CHISEN’s > 1500 cycle life).

OPzV vs OPzS vs AGM — at a glance:

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§4 CHISEN OPzV2-250 Applicable Standards (7 Standards)

CHISEN OPzV2-250 complies with the following 7 international / regional / industry standards (the product design basis). Standard compliance = sales compliance + smooth customs clearance + one-pass project bidding.

Note: Third-party inspection certificates / destination-country special certifications (SONCAP for Nigeria / PVOC for Kenya / SASO for Saudi Arabia / BIS for India / ESMA for UAE) can be arranged per customer requirements (supported by mainstream agencies SGS / TUV / BV / CTI).

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§5 CHISEN OPzV2-250 Physical Structure & Materials (Tubular vs Flat Plate)

CHISEN OPzV2-250’s tubular positive plate design is the core advantage (cycle life 1.5-2× higher than flat-plate batteries at the same capacity):

Tubular plate working principle: Fiberglass tubes completely wrap the positive active material (PbO₂), preventing active material shedding and deformation, extending deep-cycle life. This is the core design point of the DIN 40472 standard — and the reason CHISEN OPzV2-250 hits ≥ 1500 cycles @ 80% DOD.

OPzV opaque container: On-site inspection via terminal voltage + infrared temperature measurement (no need to open the cover) — perfect for unattended telecom sites.

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§6 CHISEN OPzV Series — 18-Model Full Specification Table (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. Models in the same series can be flexibly mixed-and-matched in series to build different voltage systems (48V = 24 cells / 110V = 54 cells / 220V = 108 cells / 380V = 190 cells).

Voltage bus calculation: 48V = 24 cells in series / 110V = 54 cells / 220V = 108 cells / 380V three-phase DC = 190 cells.

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§7 CHISEN OPzV2-250 Application Scenarios + Customer References

CHISEN OPzV2-250 is suited to the following 5 high-frequency industrial scenarios (exported to 60+ countries, applied across multiple industry projects):

1. Telecom base stations & wireless backhaul

• 4G / 5G base stations, transmission nodes, RRU remote units
• 48V 250Ah (12kWh) standard configuration for cell tower backup
• Valve-regulated maintenance-free → 40% lower OPEX vs flooded at unattended sites

2. Off-grid / grid-tied solar PV + wind hybrid systems

• Off-grid solar for telecom / villages / islands / oil-gas SCADA
• 24V/48V/110V/220V DC bus configurations
• Tubular gel withstands 80% DOD daily cycling for PV farms

3. Medium UPS for data centers & IT rooms

• Rack-level UPS for mid-sized data centers (50-500 kVA)
• Replace AGM flat-plate batteries with longer-life tubular gel
• 100,000+ cells in stock at CHISEN — immediate shipment

4. Rail signaling & metro emergency lighting

• Trackside signal backup power for passenger / freight rail
• Anti-vibration design tested to EN 50155 rail standard
• 220V DC panel with 108 cells for high-voltage rail signaling

5. Extreme environment — nuclear / desert / offshore

• Nuclear power plant EPS, desert telecom sites, offshore wind SCADA
• Wide temp range -40°C ~ 65°C, gel withstands thermal stress
• Maintenance-free = critical for unmanned hazardous sites

Real customer cases (5 international projects, covering Europe / South America / Middle East / Southeast Asia / Africa — CHISEN’s main export regions):

• Case 1 — European mobile operator, Alps 4G border unmanned base station: 5-year partnership, 48V 100Ah system, -25°C cold climate, valve-regulated maintenance-free reduces remote-site O&M cost 40%
• Case 2 — South American grid, Andes 3000m high-altitude substation: 4-year follow-up, 2V 500Ah 1000+ cells in series, extreme high-altitude temperature swings, DIN 40472 standard compliant
• Case 3 — Middle East state railway, 2500 km passenger line signal power: Desert extreme temperature -5~55°C, multi-voltage (48V/108V/220V/380V), anti-vibration design passed EN 50155
• Case 4 — Southeast Asian island EPC, off-grid solar + storage EPC: Tropical humid island 3-year follow-up, 48V 200Ah × 32 groups, salt-corrosion environment, deep cycle ≥ 1200 cycles
• Case 5 — African solar village, off-grid generation project: Sub-Saharan 50°C high temp, 24V/48V hybrid system, 4-year stable operation, valve-regulated maintenance-free for unmanned sites

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§8 CHISEN OPzV Valve-Regulated Gel vs OPzS Tubular Flooded — 22-Dimension Comparison Table

CHISEN OPzV (valve-regulated gel) vs OPzS (flooded) — both have tubular positive plates (OPzV = DIN 40472 / OPzS = DIN 40736-1) + 20+ year float design life. Which one? Depends on 6 dimensions:

I. Core electrical parameters (10 rows):

II. Environmental adaptability (4 rows):

III. Life & cycle (4 rows):

IV. Maintenance & installation (4 rows):

V. Commercial & decision (4 rows):

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

Selection takeaway for OPzV2-250: OPzV2-250 is the best fit for telecom base stations, unattended PV sites, and remote industrial applications where maintenance-free operation + any-direction installation + wide temperature range are the primary selection criteria. For high-cycle solar farms or large data centers with regular maintenance, OPzS may be preferred.

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§9 Selection Decision Table — OPzV / OPzS / AGM Comparison

CHISEN OPzV2-250 / OPzS / AGM three lead-acid types 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 + any-direction install)
• Large data center UPS (>500 kVA) / rail signal / emergency lighting / ship main control / manned机房 → OPzS (flooded, longer life + lower cost + higher short-circuit current)
• Auto starting / e-bike / motorcycle / small UPS / short backup (<30 min) → AGM flat-plate (lowest cost)

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§10 CHISEN OPzV2-250 Capacity Sizing Formula + Solar / Wind Configuration Parameters

Battery capacity (Ah) = Load power (W) × Backup time (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-temp derating); recommend 20-30% margin.

Example 1 — Telecom base station 48V system, 4-8h backup before generator switch. Load 1 kW, backup 4h, bus 48V, efficiency 0.85, temp 25°C. Capacity = 1000 × 4 ÷ 48 ÷ 0.85 ÷ 1.0 ≈ 98Ah. Recommended: OPzV2-100 (24 cells series for 48V), 2% margin.

Example 2 — Off-grid solar 5kW system, 4h backup. Load 5 kW, backup 4h, bus 48V, efficiency 0.85, temp 25°C. Capacity = 5000 × 4 ÷ 48 ÷ 0.85 ÷ 1.0 ≈ 490Ah. Recommended: OPzV2-500 (24 cells 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), temp 25°C. Capacity = 500 × 10 ÷ 110 ÷ 1.0 ÷ 1.0 ≈ 45Ah. Recommended: OPzV2-100 (54 cells 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, temp 25°C. Capacity = 100000 × 0.5 ÷ 220 ÷ 1.0 ÷ 1.0 ≈ 227Ah. Recommended: OPzV2-250 (108 cells series for 220V), 10% margin. ← OPzV2-250 is the perfect fit here.

Example 5 — Telecom base station 48V system, 1kW load, 8h backup. Capacity = 1000 × 8 ÷ 48 ÷ 0.85 ÷ 1.0 ≈ 196Ah. Recommended: OPzV2-200 (24 cells series), 4% margin.

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

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

Free engineering sizing: Email “system voltage + load power + backup time + operating temperature” to sales@chisen.cn, receive complete Excel sizing sheet + quotation within 24h.

5-Step Sizing Methodology

• Step 1 — Confirm system voltage + series count: Telecom base station / PV / UPS / rail / medical / ship → 24 cells series (48V system) / 54 cells series (108V compatible with 110V DC panel) / 108 cells series (216V compatible with 220V industrial power) / 190 cells series (380V three-phase DC data center UPS)
• Step 2 — Select capacity: Use “battery capacity = load power × backup time ÷ bus voltage ÷ inverter efficiency ÷ temperature coefficient” formula → select closest standard capacity (100/200/300/500/1000/1500/2000/3000 Ah), 20-30% margin
• Step 3 — Verify cycle life + battery type: Float backup (base station / UPS) → OPzV (maintenance-free 20+ years); deep cycle (PV daily) → OPzV or OPzS (tubular ≥1500 cycles); high current (data center UPS > 500 kVA) → OPzS (short-circuit 1500A+)
• Step 4 — Check dimensions + weight: OPzV2-250 dimensions 124×206×354mm / weight 20.0kg (with electrolyte); battery cabinet / rack reserve ≥ 50mm heat dissipation spacing
• Step 5 — Select after-sales + certification: Project bidding / customs clearance requires destination-country standards (see §4); recommend CHISEN (20+ year brand + 60+ country export experience + on-demand destination-country certification assistance)

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§11 CHISEN OPzV2-250 Cycle Life Detail + 20-Year TCO Comparison (Tubular vs AGM)

CHISEN OPzV2-250 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 1.5-2× longer than flat-plate batteries.

Tubular vs Flat-plate cycle life comparison (DIN 40472 + measured):

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

20-Year TCO comparison for typical 48V 250Ah backup system:

B2B key conclusion: Tubular batteries have initial cost ~1.5-2× higher than AGM flat-plate, but last 2× longer, and 20-year TCO is 30-40% lower than AGM — making OPzV2-250 a clear long-term win for telecom / solar projects with 15+ year operating horizons.

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§12 CHISEN OPzV2-250 Float Voltage Setting + Temperature Compensation Formula

CHISEN OPzV2-250 standard float voltage is 2.25-2.27V/cell (25°C, with -5mV/°C independent equalize compensation), and requires float temperature compensation -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)

Operation scenario recommendations:

• Cold region (winter -20~0°C ambient): Float compensation 2.25-2.30V/cell — too low will be unbalanced, recommend higher compensation -5mV/°C
• Standard机房 (15-30°C): Float 2.25-2.27V/cell no compensation (factory default 25°C)
• Hot region (tropical / desert 30-50°C): Float 2.20-2.23V/cell with -3.3mV/°C compensation — high temp = float voltage to drop, otherwise accelerate grid corrosion
• Telecom base station outdoor cabinet: with intelligent temperature compensation controller (most UPS / solar controllers support)

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§13 CHISEN Factory Capability & Certifications — Why B2B Buyers Choose CHISEN

Factory capability (verified):

CHISEN customer reference (highlights, 60+ countries):

• European telecom operator — 5-year partnership (continuous replenishment)
• Middle East state railway — 2500 km passenger line backup power project (flagship)
• South American grid — Andes 3000m high-altitude substation (extreme environment)
• Southeast Asian island EPC — off-grid solar storage system (climate adaptation)
• African solar village — Sub-Saharan high-temp off-grid project (maintenance-free)

Why B2B buyers choose CHISEN (4 reasons):

1. Factory-direct pricing — 8 production bases + 70 million kVAh capacity, no middlemen, factory-direct pricing better than market average 15-25%
2. 60+ country export experience — destination-country certifications (SONCAP / PVOC / SASO / BIS / ESMA) handled in one stop, customs clearance smooth
3. 24h quote + free selection — Send inquiry, receive complete Excel sizing sheet + factory-direct quotation within 24h
4. Full after-sales + OEM/ODM — 3-year warranty + on-site guidance + OEM/ODM customization + spare parts supply

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§14 Frequently Asked Questions (FAQ) — 6 Q&A for CHISEN OPzV2-250

Q1: What’s the difference between CHISEN OPzV2-250 and OPzS2-250?

A: Both are tubular plate batteries, capacity 250Ah, same dimensions 124×206×354mm. Main difference is electrolyte and maintenance:

• OPzV2-250 = Tubular + nano gel electrolyte + valve-regulated sealed (VRLA), maintenance-free, any-direction install, float life 20+ years, no water refill
• OPzS2-250 = Tubular + dilute H₂SO₄ electrolyte + open vented (flooded), needs water refill every 3-6 months, must be vertical, float life 20-25 years (with maintenance), 50% longer cycle life (1500-2500 cycles vs OPzV ≥1500)

Selection: If unmanned / remote / island / border / desert / automotive applications → OPzV2-250 (maintenance-free). If large data center UPS (>500 kVA) / rail signal / deep cycle solar (>1200 cycles/year) / manned机房 with regular maintenance → OPzS2-250.

Q2: How many OPzV2-250 cells are needed to make a 48V/110V/220V/380V system?

A: Voltage bus = 2V × series cells:

• 48V system: 24 cells in series (e.g., 24 × OPzV2-250 → 48V 250Ah / 12kWh)
• 110V DC panel (108V): 54 cells in series (54 × OPzV2-250 → 108V 250Ah / 27kWh)
• 220V industrial power (216V): 108 cells in series (108 × OPzV2-250 → 216V 250Ah / 54kWh)
• 380V three-phase DC: 190 cells in series (190 × OPzV2-250 → 380V 250Ah / 95kWh)

To increase capacity (Ah), add cells in parallel (e.g., 24S2P → 48V 500Ah). Contact CHISEN engineering team for system design + cabinet / rack customization.

Q3: Does CHISEN OPzV2-250 support OEM/ODM customization?

A: Yes. CHISEN supports OEM/ODM:

• OEM: Your brand label + packaging (custom brand > 200 cells)
• ODM: Custom capacity / dimensions / terminal / voltage / case color (needs project evaluation, MOQ 500 cells)
• Project customization: Special certifications (UL / SONCAP / SASO) and special destination-country marking supported

Lead time: Standard 7-15 days for shipment; OEM 15-25 days; ODM 30-45 days.

Q4: What’s the cycle life of OPzV2-250? How to maximize it?

A: Datasheet nominal ≥ 1500 cycles @ 80% DOD (IEC 60896-21 test conditions, 25°C). To maximize life:

• Operating temperature: Stay at 25°C ideal, derating above 35°C (high temp accelerates grid corrosion)
• Float voltage: Strictly follow 2.25-2.27V/cell (25°C), with temperature compensation -3.3mV/°C
• Discharge depth: Avoid >80% DOD, recommended working range 30-70% DOD
• Charging current: Limit to ≤ 0.30C₁₀ (i.e., ≤ 75A for OPzV2-250), do not exceed datasheet max
• Equalize charging: Monthly equalize charge (2.30-2.35V/cell) ≤ 24h, re-balances cells
• Avoid over-discharge: Set low-voltage disconnect at 1.90V/cell (protect from deep over-discharge)

Q5: What’s the warranty? How to claim?

A: CHISEN OPzV2-250 standard warranty is 3 years (from B/L date). Warranty scope:

• Cover: Manufacturing defects / container cracking / premature capacity loss (<80% nominal within 3 years)
• Not cover: Over-discharge / over-charge / physical damage / unauthorized modification / improper operating environment

Claim procedure: Email warranty claim + battery serial number + photos + test data → sales@chisen.cn. CHISEN replies within 48h with replacement / repair / credit solution.

Q6: What’s the FOB price and lead time for OPzV2-250?

A: CHISEN OPzV2-250 factory-direct pricing tier:

• 1-50 cells: FOB Ningbo USD 145-160/cell (small order volume)
• 50-200 cells: FOB Ningbo USD 125-140/cell (medium order)
• 200+ cells: FOB Ningbo USD 105-120/cell (bulk order, contact for special pricing)
• 1000+ cells: Project-specific pricing (includes destination-country certification + OEM label)

Lead time: Standard stock 7-15 days for shipment; OEM/ODM 15-25 days; large project 30-45 days. CIF / DDP / DAP / FOB / EXW flexible trade terms.

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§15 Expert Summary — CHISEN Senior Battery Engineer’s 5-Point Buying Advice

As a CHISEN senior battery engineer with 20+ years of lead-acid battery experience, here are my 5 key buying recommendations for OPzV2-250:

1. Define application scenario first — Telecom base station / off-grid solar / mid-UPS → OPzV (gel); large UPS / rail signal / deep-cycle PV → OPzS (flooded); starting battery / small UPS → AGM. Don’t over-spec, don’t under-spec.

1. Voltage bus drives series count — 48V = 24 cells / 110V = 54 cells / 220V = 108 cells / 380V = 190 cells. Series more than 24 cells → recommend single-cell consistency verification, ensure parallel capacity balance.

1. Plan for 20-year lifetime, not 5-year — OPzV2-250 has 20+ year float life. Choose series-parallel topology + space + mast ladder + cable + monitoring channels consistent with 20-year operation. Avoid “first cheap, later expensive” trap (cheap purchase + multiple replacements).

1. Procure from factory-direct (CHISEN) — 8 factories + 70 million kVAh capacity + 60+ country export experience + 24h quote + 3-year warranty + destination-country certification assistance. Factory-direct pricing 15-25% below market average.

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§16 Call to Action — Get Free Sizing & Quotation

Ready to spec CHISEN OPzV2-250 2V250Ah for your telecom base station / solar project / UPS / industrial backup? Contact CHISEN engineering team:

• Email: sales@chisen.cn
• WhatsApp / Phone: +86 131 6622 6999
• WhatsApp quick chat: wa.me/8613166226999
• Website: www.chisen.cn

Free services:

1. Free sizing sheet — Send “system voltage + load power + backup time + operating temperature” → receive complete Excel sizing sheet within 24h
2. Free factory-direct quotation — FOB/CIF/DDP/DAP all-inclusive pricing, 24h reply
3. Free OEM/ODM evaluation — Custom brand + custom specifications, project evaluation within 48h
4. Free destination-country certification — SONCAP/PVOC/SASO/BIS/ESMA, handled by SGS/TUV/BV/CTI
5. Free on-site installation guidance — Large project on-site commissioning (project-specific)

CHISEN Brand Promise:

• 20+ year lead-acid battery brand (since 2003)
• 8 factories + 70 million kVAh annual capacity
• 60+ country export experience
• CE / IEC / UL / ISO 9001 / ISO 14001 / OHSAS 18001 certified
• 3-year warranty + global after-sales network

Don’t wait — buyers who contact CHISEN engineering team first get the technical evaluation + production priority + competitive pricing advantage.

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About CHISEN Battery (CHISEN Battery Co., Ltd.)

Founded 2003, headquartered in Hangzhou, China. CHISEN is a professional industrial lead-acid battery + lithium battery + solar energy storage manufacturer with 8 production bases and 70 million kVAh annual capacity. Products export to 60+ countries covering telecom, UPS, solar, rail, ship, e-bike, emergency lighting, and industrial power backup. Visit www.chisen.cn for the complete product catalog + datasheets + case studies.

Related Products:

• CHISEN OPzV2-200 (2V 200Ah) — slightly smaller capacity for smaller systems
• CHISEN OPzV2-300 (2V 300Ah) — slightly larger capacity for higher-load sites
• CHISEN OPzV2-500 (2V 500Ah) — large UPS + substation DC for high-power systems
• CHISEN OPzV2-1000 (2V 1000Ah) — large solar farm + large data center backup
• CHISEN OPzV2-1500 (2V 1500Ah) — large solar farm + offshore wind + rail signal
• CHISEN OPzV2-2000 (2V 2000Ah) — bulk energy storage + substation main backup

Related Categories:

• Lead-acid battery (Tubular GEL VRLA / OPzS Tubular Flooded / AGM VRLA / Front-terminal)
• Lithium battery (LiFePO4)
• Solar energy storage system (PV inverter + LiFePO4 battery pack)
• E-bike battery (6-DZF-12 / 6-DZF-20 / 6-DMF-32)
• Telecom backup power (48V / 110V / 220V / 380V DC panels)

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Document version: 2026-09-28 | CHISEN Battery Co., Ltd. | www.chisen.cn | sales@chisen.cn | +86 131 6622 6999

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