OK SOLAR LIMITED designs and manufactures high-performance LiFePO4 energy storage batteries and storage inverters — reliable, efficient solutions for residential and commercial customers worldwide.
OK SOLAR LIMITED is headquartered in Hong Kong, with a factory located in Shenzhen, China. We specialize in the research & development, production and sales of energy storage batteries and energy storage inverters, delivering reliable and efficient solutions for residential and commercial customers.
Our experienced team is dedicated to the highest standards of quality and reliability. Using the latest technology and manufacturing processes, we produce storage batteries and inverters that are both efficient and cost-effective — helping customers reduce their carbon footprint and save on energy bills, together creating a more sustainable future.
High-voltage stacked LiFePO4 battery modules for home and commercial energy storage — scalable from 5.12 kWh up to 76.8 kWh, ground or wall mounted, compatible with major PCS brands.
Full performance, communication and general specifications of the OK-GL 5KWH series.
| Model | OK-GL 5KWH | OK-GL 5KWH-2 | OK-GL 5KWH-3 | OK-GL 5KWH-4 |
|---|---|---|---|---|
| Performance | ||||
| Nominal Voltage | 51.2 Vdc | |||
| Nominal Capacity | 100 Ah | 200 Ah | 300 Ah | 400 Ah |
| Battery Energy | 5.12 kWh | 10.24 kWh | 15.36 kWh | 20.48 kWh |
| CUS | 4.6 kWh | 9.2 kWh | 13.8 kWh | 18.4 kWh |
| Charge Voltage | 55.68 – 56.16 Vdc | |||
| Discharge Voltage | 45.6 – 56.16 Vdc | |||
| Charge Current | 50 A | 100 A | 100 A | 100 A |
| Discharge Current | 100 A | |||
| Short-circuit Current | 350 A | |||
| Communication | ||||
| Display | SOC status indicator, LED indicator | |||
| Communication | RS232 / RS485 / CAN | |||
| General Specification | ||||
| Dimension (W×D×H, mm) | 620×145×435 | 620×145×815 | 620×145×1195 | 620×145×1575 |
| Weight | 47 kg | 91.3 kg | 135.6 kg | 180 kg |
| Installation | Ground mounted or wall mounted | |||
| Working Temperature | Charge 0℃ ~ 55℃ · Discharge −20℃ ~ 55℃ | |||
| Storage Temperature | ≤25℃, 12 months · ≤35℃, 6 months · ≤45℃, 3 months | |||
| Operating / Storage Humidity | ≤95% RH | |||
| Max Operating Altitude | ≤2000 m | |||
| IP Rating | IP20 | |||
| Cell Technology | LiFePO4, Lithium Iron Phosphate | |||
| Cycle Life | 6000 cycles @ 80% DOD / 25℃ / 0.5C, 60% EOL | |||
| Scalability | Max 15 batteries in parallel | |||
| Ordering & Deliverable Part | ||||
| Product Ordering Part | OK-GL 5KWH Battery · OK-GL Base + Power Cable · OK-GL Parallel Cable · OK-GL Wall Mount | |||
Premium lithium iron phosphate (LiFePO4) cells with multi-level protection for long-term stability.
Proprietary CTP (cell-to-pack) technology packs more energy into a slim, space-saving body.
Scalable from 5.12 to 76.8 kWh — start small and expand anytime with up to 15 units in parallel.
Modular stacked design supports ground-mounted or wall-mounted installation in minutes.
RS232 / RS485 / CAN communication works seamlessly with major PCS and inverter brands.
SOC indicator and LED monitoring with full overcharge, over-discharge and short-circuit protection.
Seven strict control stages ensure consistent, safe and reliable production — batch after batch.
Verify authenticity and quality of all incoming raw materials — cells, electrolytes, separators and components — with visual, dimensional and performance checks. Non-conforming materials are rejected.
Standardized procedures for every step — cell assembly, electrode coating, formation and pack assembly — with calibrated equipment, in-process inspections and environmental monitoring.
Representative samples from every batch are tested for capacity, cycle life, self-discharge, internal resistance, voltage stability — results compared against strict specifications.
Rigorous tests for overcharge, over-discharge, short-circuit and thermal stability protection, plus temperature cycling, vibration and shock testing for real-world durability.
Comprehensive records of all quality activities and a robust traceability system track the origin and history of each battery for effective management.
Clear quality requirements for every supplier, with regular audits and evaluations to guarantee compliance and fast corrective actions.
Ongoing review of quality processes, stakeholder feedback and training programs keep our quality standards moving forward.
Every OK-GL battery ships with manufacturer warranty coverage and lifetime technical support. Contact us for full warranty terms and product registration.
60% EOL cycle-life rating — years of dependable daily cycling for solar self-consumption and backup.
Connect up to 15 batteries in parallel for up to 76.8 kWh of storage capacity.
Comprehensive performance and safety testing on every production batch before shipping.
Professional documentation, commissioning guidance and responsive after-sales service.
80–90% of production exported worldwide from our Shenzhen factory, managed from Hong Kong.
Flexible cooperation for distributors, installers and brand partners — let's build together.
Need the full warranty policy? Email info@oksolar.hk and our team will reply within one business day.
Request Warranty TermsRoom 1318-19, 13/F, Hollywood Plaza,
610 Nathan Road, Mongkok,
Kowloon, Hong Kong
Factory located in Shenzhen, China
R&D · Production · Sales
