Solar batteries for brownouts in the Philippines
51.2 V LiFePO4 batteries from 5 to 20 kWh that keep homes and shops running through brownouts and typhoon season, with IP65 models for humid and coastal sites.
What we keep in mind for Philippine installs
Brownout backup
A 5 kWh battery runs a fridge, lights, Wi-Fi and a TV (about 300 W) for roughly 13 hours; 10 kWh doubles that.
Heat and humidity
IP65 models (KNY 51 series, ESS-D, ESS-E, ESS-H, Hess-20, AU51120) suit humid, coastal and covered outdoor spots. All models discharge from -20 to 60 °C and charge from 0 to 55 °C.
Grows with the home
Start with one battery and add more later: most models run up to 15 units in parallel.
Which battery for which hybrid inverter?
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| Inverter | Battery current at full load | What we suggest |
|---|---|---|
| 3 kW | 62 A | One 10 kWh unit (100 A recommended), or two 5 kWh units in parallel |
| 5 kW | 103 A | One 10, 15 or 16 kWh unit runs at about its recommended 100 A; add a second unit for long full-power use |
| 6–8 kW | 123–164 A | One 16 or 20 kWh unit (200 A max), or two 10 kWh units if it runs near full power for hours |
| 10 kW | 206 A | Two 10–20 kWh units in parallel, so each stays near its recommended 100 A |
Rule of thumb: about 20 A of battery current per kW of inverter output at 51.2 V, allowing for about 95% inverter efficiency. 5 kWh units are rated 50–70 A recommended and 100 A maximum; our 10–20 kWh units 100 A recommended and 200 A maximum. Check the kW rating on the inverter label: a KVA figure is often a little higher than the real output. Runtime is a separate question; see the capacity pages.
Compare by capacity
5 models compared side by side
Compare 5 kWh batteries → 10 kWh 51.2 V · 200 Ah · 10.24 kWh4 models compared side by side
Compare 10 kWh batteries → 16 kWh 51.2 V · 314 Ah · 16.08 kWh14 models compared side by side
Compare 16 kWh batteries → 20 kWh 51.2 V · 400 Ah · 20.48 kWh4 models compared side by side
Compare 20 kWh batteries →IP65 models to start with
KNY 51 series
Four capacities in one family: a 5 kWh wall unit and 10, 15 and 16 kWh floor units, all IP65.
View specifications →
ESS-H series
IP65 floor battery with Bluetooth, WiFi and a built-in aerosol fire extinguisher. The most compact of the three ESS styles.
View specifications →
Hess-20
20 kWh floor-standing battery with an IP65 enclosure and up to 16 units in parallel.
View specifications →
AU51120
Slim 51.2 V LiFePO4 pack for indoor or outdoor walls, with a built-in breaker and status display.
View specifications →Importing into the Philippines
- Certification
- In May 2026 the DTI published a draft order that would bring battery energy storage systems under mandatory certification, with an Import Commodity Clearance (ICC) for imported products. Ask us for the latest status before you order.
- Shipping
- LiFePO4 batteries go by sea as Class 9 dangerous goods, with the UN38.3 test summary and MSDS, to Manila, Cebu or Davao.
- Your documents
- Commercial invoice, packing list, datasheets and the CE, IEC 62619, UN38.3 and MSDS documents listed for each model.
Import rules change. Your clearing agent has the final word on what each shipment needs.
Which batteries suit hot, humid or coastal areas?
Choose an IP65 model: KNY 51 series, ESS-D, ESS-E, ESS-H, Hess-20 or AU51120. All our 51.2 V batteries discharge from -20 to 60 °C and charge from 0 to 55 °C; keep them out of direct sun.
How much battery do I need for brownouts?
At an average load of 1 kW, a 10 kWh battery lasts about 8 hours and a 16 kWh battery about 13 hours, using 80% of the stored energy. For essentials only (about 300 W), a 5 kWh battery lasts about 13 hours.
Do imported batteries need BPS certification?
In May 2026 the DTI proposed mandatory certification for battery energy storage systems, with an ICC for imports. Ask us for the latest status; we supply the CE, IEC 62619, UN38.3 and MSDS documents that each model has.
Does it work with 220 V, 60 Hz systems?
Yes. The battery is 51.2 V DC, so the grid voltage and frequency are the inverter’s job. The KNY5000 inverter that comes with our ZC-S stack supports 50 and 60 Hz.
Will it work with my inverter?
Our 51.2 V batteries talk to inverters over CAN and RS485, and most models also have RS232. Send us the inverter brand and model and we check the communication protocol before you order.
Get a quote for the Philippines
Tell us the inverter size, the capacity your customers ask for and the quantity. We reply with a matched model, datasheet and price.