OPzV2-350 2V350Ah Tubular Gel Battery for Telecom, UPS & Solar Storage — CHISEN Buyer’s Guide

Answer First

The OPzV2-350 2V350Ah is a 2-volt, 350 Ah C10 tubular-plate gel valve-regulated lead-acid (VRLA) cell designed for stationary backup power. It combines tubular positive plates (Pb-Ca die-cast, glass-fibre tube wrapped) with nano-silica gel electrolyte to deliver ≥1,500 cycles at 80 % depth-of-discharge (DOD) and a 20+ year float design life at 25 °C under IEC 60896-21 / DIN 40472 / GB/T 19638.1-2014. In practical terms: 24 cells in series give a 48 V telecom/UPS string, 54 cells give 108 V (110 V DC) sub-station battery, and 108 cells give 216 V (220 V industrial DC) bus — exactly the configurations telecom operators, data-centre UPS rooms, solar mini-grids and railway signalling cabinets need.

If you are a procurement engineer, EPC contractor or distributor sourcing 2 V 350 Ah gel cells for a 48 V / 110 V / 220 V system and you need a single SKU that survives 20+ years across temperature, charge regime and humidity — the CHISEN OPzV2-350 2V350Ah is engineered for exactly that workload.

Key Takeaways

1. 2 V 350 Ah C10 single cell — flexible series stringing: 24 cells = 48 V, 54 cells = 108 V (110 V DC), 108 cells = 216 V (220 V DC), 190 cells = 380 V three-phase DC.
2. Tubular positive plate + nano-gel electrolyte — cycle life ≥1,500 cycles @ 80 % DOD, 3× longer than flat-plate AGM in deep-cycle service.
3. Float design life 20+ years @ 25 °C — per IEC 60896-21; temperature compensation –3.3 mV/°C/cell.
4. Wide operating window –40 °C to +65 °C (discharge) and –30 °C to +65 °C (charge) — proven in tropical base stations, desert telecom sites and sub-zero remote BTS.
5. Maintenance-free sealed gel — no water refilling, can be installed upright / side-mounted / horizontal (no inversion), ideal for unmanned cabinets.
6. Standards coverage: IEC 60896-21/22, IEC 61427 (solar), DIN 40472, GB/T 19638.1-2014, Eurobat Long Life, BS 6290 Pt 4, UL 1989, YD/T 1360 (China telecom).
7. CHISEN factory direct — 20+ years lead-acid specialist, 60+ country export record, 200+ SKU product line, 100,000+ unit ready stock on 6-DZF / 6-DMF / 6-EVF, complete CE / RoHS / REACH / MSDS / UN2794 export documentation.

Specifications at a Glance — OPzV2-350 2V350Ah

Why OPzV2-350 2V350Ah — The Pain of Sourcing 2 V 350 Ah Gel Cells

Most 2 V 350 Ah gel cells on the market fall into three failure patterns B2B buyers know well:

– Insufficient cycle life at 80 % DOD — flat-plate AGM cells stop at 500–1,000 deep cycles, forcing telecom sites to swap banks every 3–4 years. CHISEN OPzV2-350 gives ≥1,500 cycles at the same DOD — that is 50 % longer replacement interval and a real cut in site-visit OPEX.
– Premature capacity loss in hot climates — generic GEL cells drift above 35 °C and lose 50 % float life per +10 °C (Arrhenius rule). CHISEN’s gel formulation is rated for charge up to 65 °C with the recommended temperature-compensated float, keeping capacity within ±5 % at sub-station cabinets in tropical Africa, the Gulf and South-East Asia.
– String imbalance because no matched-cell service — 24-cell strings fail early when individual cells drift more than ±0.05 V. CHISEN factory-fresh cells are capacity-tested and matched (within 2 % C₁₀) before packing, plus the brand ships free equalisation-charge guidance for the first commissioning cycle.

In short: the buyer pain is life, heat and string balance — exactly what CHISEN OPzV2-350 is engineered to fix.

How to Choose — 5-Step Decision Framework

Step 1 — Confirm system voltage and string length. 48 V telecom = 24 cells, 110 V DC sub-station = 54 cells, 220 V industrial DC = 108 cells, 380 V three-phase DC = 190 cells. The OPzV2-350 is the same physical cell in every string.

Step 2 — Size capacity from your load profile. Formula: Battery Capacity (Ah) = Load (W) × Backup (h) ÷ Bus Voltage (V) ÷ Inverter efficiency ÷ Temperature factor. Example: 5 kW load, 4 h backup, 48 V bus, UPS efficiency 0.85, 25 °C → 5,000 × 4 ÷ 48 ÷ 0.85 ≈ 490 Ah → choose OPzV2-500 (24 cells) or two parallel strings of OPzV2-350 for 700 Ah with 20 % redundancy.

Step 3 — Pick cell technology. Float backup (telecom BTS, UPS) → OPzV gel (this product); deep-cycle solar daily DOD 80 % → OPzV or OPzS flooded; high-rate UPS > 500 kVA → OPzS (higher short-circuit current); automotive / small UPS → AGM flat plate.

Step 4 — Verify physical fit and clearances. Cabinet / rack space: 124 × 206 × 471 mm + ≥ 50 mm airflow gap. Floor load: 26.0 kg × 24 cells = 624 kg per 48 V string — verify rack rating.

Step 5 — Lock certifications and after-sales. Cross-border projects need IEC 60896, MSDS, UN2794, Certificate of Origin. End-market specific: SONCAP (Nigeria), PVOC (Kenya), SASO (Saudi), BIS (India), ESMA (UAE). CHISEN provides the full document pack plus 24-month base warranty extendable to 36 months for tender-driven projects.

Why Tubular Positive Plate + Nano-GEL Beats AGM

Key takeaway: Tubular gel costs ~1.5× more per cell at first purchase, but the 20-year TCO is 30–40 % lower because you avoid mid-life bank replacements — see CHISEN TCO model in §11 of any OPzV spec sheet.

CHISEN OPzV Series Capacity Range — 18 SKUs

Same family as OPzV2-350, all IEC 60896 / DIN 40472 compliant, mix-and-match within a string for staged capacity expansion:

Real-World Applications

Telecom BTS — 4G/5G Base Station Backbone

Use case: 48 V 350 Ah DC string at a remote BTS, 8-hour backup before generator cut-over, ambient 30–45 °C, daily grid fluctuation. CHISEN OPzV2-350 in 24-cell series delivers 8-hour hold-up at 1.7 kW load with ≥80 % capacity after 5 years — verified on deployments in South-East Asia and East Africa.

UPS — Data-Centre & Industrial

Use case: 400 kVA UPS room, 220 V DC bus, 15-minute full-load backup then generator. 108-cell OPzV2-350 string delivers 380 Ah at 216 V — enough for 18 minutes at full load. Tubular gel survives >3,000 shallow cycles at 30 % DOD during weekly generator testing with zero cell replacement.

Solar / Wind Off-Grid

Use case: 5 kW hybrid PV mini-grid, 48 V bus, 4-hour evening backup, daily DOD 70 %. 24-cell OPzV2-350 + solar controller with temperature-compensated charge delivers ≥1,500-cycle life → 4+ years of daily deep cycling before reaching end-of-life, vs ~2 years for AGM. IEC 61427 compliant — meets solar-tender requirements.

Railway Signalling & Sub-station DC

Use case: 110 V DC screen at a railway signalling cabinet or 220 V sub-station battery, ambient –5 °C to +55 °C, weekly deep discharge to 50 %. OPzV2-350 54-cell / 108-cell string with EN 50155 anti-vibration mounting gives 15+ year service in field deployments across China, India and the CIS region.

Frequently Asked Questions — OPzV2-350 2V350Ah

Q1: What is the float voltage for OPzV2-350 2V350Ah?
A: 2.25–2.27 V/cell at 25 °C, with mandatory –3.3 mV/°C temperature compensation per IEC 60896-21. Tighten tolerance to ±1 % (±25 mV); outside this range float life drops materially.

Q2: What is the cycle life of OPzV2-350 at 80 % DOD?
A: ≥ 1,500 cycles at 80 % DOD @ 25 °C (CHISEN IEC 60896-21 test). At 50 % DOD the cycle life extends to 2,200+ cycles. Tubular positive plate design is the core reason — 1.5–2× the life of flat-plate AGM at the same depth of discharge.

Q3: What is the operating temperature range?
A: Discharge –40 °C to +65 °C, charge –30 °C to +65 °C, storage –25 °C to +45 °C. Best operating point is 25 °C (rated capacity definition). For every +10 °C above 25 °C, float life halves (Arrhenius rule), so cabinets above 35 °C must use temperature-compensated charge and forced ventilation.

Q4: What is the self-discharge rate?
A: 2 %/month at 20 °C fully charged. Cells can sit on the shelf for 12 months without recharge. If storage temperature exceeds 30 °C, top-up charge every 6 months at 2.27 V/cell × 24 h.

Q5: Can OPzV2-350 be installed horizontally or side-mounted?
A: Yes. Tubular gel is sealed — installation orientation is upright / horizontal / side-mount. Do not invert the cell (terminals facing down). For mobile / rail / vehicle applications this orientation flexibility cuts cabinet cost by 20–30 % vs flooded OPzS.

Q6: What string length for 48 V / 110 V / 220 V / 380 V systems?
A: 48 V = 24 cells, 110 V DC = 54 cells (108 V bus, tolerance –2 V), 220 V DC = 108 cells (216 V bus, tolerance –4 V), 380 V three-phase DC = 190 cells.

Q7: How does OPzV2-350 differ from OPzS2-350?
A: Same 2 V 350 Ah C10 footprint. OPzV is sealed gel — maintenance-free, installable in any orientation. OPzS is flooded tubular — needs water top-up every 3–6 months, must stay upright. OPzV has higher short-circuit current (2,400 A vs 2,200 A) and lower self-discharge (2 % vs 3 %/month). OPzV is preferred for unmanned sites; OPzS is preferred for attended sub-stations where lower TCO matters more than convenience.

Q8: What export documents are required?
A: Commercial invoice, packing list, Certificate of Origin, MSDS, UN2794 transport classification (IMDG sea / ADR road / IATA air), IEC 60896-21 test report. For destination-specific certifications (SONCAP Nigeria, PVOC Kenya, SASO Saudi, BIS India, ESMA UAE, KCS Korea), CHISEN assists the buyer with the application via SGS / TUV / BV / CTI.

Q9: What is the minimum order quantity?
A: Sample 1 cell (air-shippable), small batch 24 cells (24 V sub-system) or 48 cells (48 V system + spares), bulk ≥200 cells (multi-voltage kits + full OEM branding). Lead time 1–45 days depending on configuration; urgent orders 15-day air-freight available.

Q10: How do I size the right OPzV capacity for my UPS?
A: Battery Capacity (Ah) = Load (W) × Backup (h) ÷ Bus Voltage (V) ÷ Inverter efficiency ÷ Temperature factor. UPS efficiency 0.85, DC load 1.0; temperature factor 1.0 at 25 °C, 0.85 at 35 °C, 0.70 at 45 °C. Add 20–30 % design margin. Send CHISEN your system voltage + load (kW) + backup (h) + ambient temperature to sales@chisen.cn and we return a free Excel sizing sheet within 24 hours.

Expert Summary — When to Specify OPzV2-350

Choose the CHISEN OPzV2-350 2V350Ah when your project needs a 2 V 350 Ah single cell with 20+ year float life and ≥1,500 deep cycles, with the standards pack to clear cross-border tendering (IEC 60896-21/22, DIN 40472, GB/T 19638.1, IEC 61427, Eurobat Long Life), and the factory-direct economics that only a 20+ year CHISEN veteran can offer.

For 48 V telecom BTS → 24-cell string. For 110 V DC sub-station → 54-cell string. For 220 V industrial DC → 108-cell string. For 380 V three-phase DC UPS → 190-cell string. All four configurations supported from one cell SKU.

Contact CHISEN — Quote in 24 Hours

CHISEN Battery — 20+ years lead-acid specialist, 60+ country export record, 200+ SKU product line, 100,000+ unit ready stock.

– Email: sales@chisen.cn (24-hour quote + sizing sheet)
– Phone / WhatsApp: +86 131 6622 6999 (Mon–Fri 9:00–18:00 Asia/Shanghai)
– Website: https://www.chisen.cn
– Address: Room 3402, Bldg 2, Fortune Financial Center, Hangzhou, China

Tell us your system voltage + load (kW) + backup hours + ambient temperature and CHISEN engineering will return a complete Excel sizing table, itemised FOB/CIF quotation and free reference samples within 24 hours.

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*Sources: CHISEN OPzV series product datasheet 2026 (IEC 60896-21 / DIN 40472 / GB/T 19638.1-2014 tested parameters); CHISEN 2026 capacity-vs-temperature curves; Eurobat Long Life classification guide.*

*Internal links for further reading:*
– CHISEN 6-DZF-20 12V20Ah for e-bike battery packs — https://www.chisen.cn/en/6-DZF-20/12V20Ah.html
– CHISEN OPzV2-500 2V500Ah for telecom — https://www.chisen.cn/en/OPzV2-500/2V500Ah.html
– CHISEN OPzS2-1000 2V1000Ah flooded alternative — https://www.chisen.cn/en/OPzS2-1000/2V1000Ah.html

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