Deye Battery Review (Philippines): The Inverter Brand's LiFePO4 Line
Published specifications for the SE-G5.1 Pro-B. A brand ships several series, so these figures describe this model and not every product the manufacturer sells.
- Nominal capacity
- 5.12 kWh51.2 V, 100 Ah. Stackable in parallel.
- Usable capacity
- About 4.6 kWhAt the stated 90% depth of discharge.
- Chemistry
- LiFePO4 with integrated BMS
- Depth of discharge
- About 90%
- Cycle life
- 6,000+ cycles
- Warranty
- 10 yearsOnly as good as whoever backs it — Deye's terms note an unauthorised reseller can complicate a claim.
- Installed cost
- ₱13,000–23,000 per usable kWhThe category planning anchor rather than a Deye-specific quote.
Source: Deye energy storage product range. Checked 2026-09-28. Manufacturers revise specifications between series without notice — confirm the figures for the exact model you are quoted before you pay.
What it does well
- 6,000+ cycles at about 90% depth of discharge, competitive with anything in the category.
- A 10-year warranty, level with what most LiFePO4 competitors now offer.
- Pairs natively with Deye hybrid inverters, which are among the most commonly installed here, so commissioning experience is widespread.
Where it falls short
- The same fragmented sales channel as the Deye inverter and with even less local presence — we could not identify a named Philippine distributor for the battery specifically.
- A 10-year warranty with no accountable national party behind it is weaker in practice than a shorter term from a brand with a named distributor.
- At about 4.6 kWh usable per module, whole-house backup needs several units and the per-kWh cost rises with the extra hardware.
Compare against the other 19 home batteries we have reviewed
How the SE-G5.1 Pro-B compares with the other home batteries we have reviewed. Listed in no particular order — this puts published figures side by side, it does not pick a winner. Scroll the table sideways to see every column.
| Model | Usable capacity | Depth of discharge | Cycle life | Warranty |
|---|---|---|---|---|
| SE-G5.1 Pro-B this review | About 4.6 kWh | About 90% | 6,000+ cycles | 10 years |
| US-series (US2000 / US3000C / US5000) | 4.56 kWh (US5000) | 90–95% | Up to 6,000 cycles | 5–7 years product |
| PowerBox Pro | 9.216 kWh | 90% | 6,000+ cycles | 10 years, throughput-based |
| Battery-Box Premium HVS / HVM and HVB | — | 80–90% | 6,000+ cycles | HVS/HVM 10 years · HVB 15 years |
| Lite Home range | 4–24 kWh | 80% | — | — |
| SMILE-G3-BAT-10.1P | 9.6 kWh per module | 95% | 8,000 | 10 years |
| LiTime 12 V, 24 V and 51.2 V LiFePO4 packs | — | — | — | 5 years above 30 Ah, 3 years below |
| UP5000, UP6100 and stackable SSRE series | Around 4.95 kWh on the UP5000 | 90% | Over 6,000 at 90% depth of discharge | — |
| RESU Prime 10H and 16H | Roughly 9.6-16 kWh depending on model | — | — | 10 years in markets where LG officially sells it |
| 51.2 V rack packs and 12 V 100 Ah units | Around 5.1 kWh (51.2 V 100 Ah), around 10.2 kWh (200 Ah) | — | — | — |
| Solar Master deep cycle (SM40 to SM200) | Around 0.6 kWh (SM100), 0.9 kWh (SM150), 1.2 kWh (SM200) | Around 50% | — | Local manufacturer warranty |
| EOS600, sold locally as MESLA | Around 14-15 kWh | Around 50% | — | 2 years |
| Ritar Solar LiFePO4, and the separate VRLA and OPzV telecom line | — | — | — | — |
| Sebang automotive lead-acid, sold as Rocket | — | — | — | Roughly 15 months private use |
| BMS boards and factory LiFePO4 packs | — | — | — | — |
| SDA10-48100 and the wider LiFePO4 range | — | — | — | — |
| Flooded, AGM and gel deep cycle | — | Around 50% | — | — |
| Powerwall 3 | 13.5 kWh | — | Unlimited cycles under warranty | 10 years, at least 70% capacity retention |
| Stackable 48 V modules and 12 V portable packs | — | — | Over 6,000 on some models | — |
| 5.3 kWh modules, high-voltage stackable | 5.3 kWh per module | — | — | — |
Dashes are figures the manufacturer does not publish, not zeros. Where two products differ on a spec, which one matters depends on your roof and your usage — a higher efficiency panel earns its premium on a small roof and rarely on a large one.
Deye is best known in the Philippines for its hybrid inverters, but it also builds its own LiFePO4 battery line. The battery itself looks competitive on paper — the issue is that it rides on the same fragmented, no-single-distributor sales channel as the inverter, with even less local track record.
Lineup and specs
Deye’s low-voltage residential line centers on the SE-G5.1 (and SE-G5.1 Pro-B), a 51.2V/100Ah module rated at 5.12 kWh nominal capacity, stackable in parallel and built around LiFePO4 chemistry with an integrated BMS. Deye also sells a high-voltage BOS series (BOS-A, BOS-W, BOS-G, BOS-B) aimed at larger stacked systems, with cycle life rated at 6,000+ cycles at roughly 90% depth of discharge. That puts Deye’s cycle and DoD figures in the same range as established names like Pylontech and BYD — it’s not a weaker chemistry, just a newer entrant to the battery side of the business specifically.
Warranty
Deye’s own datasheets for the SE-G5.1 Pro-B and BOS-G series list a 10-year warranty, in line with what most LiFePO4 competitors now offer. As with the inverter, that warranty is only as good as who’s backing your specific purchase — Deye’s terms note that buying through an unauthorized reseller can complicate a claim, so get the warranty document and RMA process in writing from whoever sells it to you.
Local availability
This is where the Deye battery diverges from the inverter’s already-mixed picture. The inverter has real installed volume in the Philippines through importers like LakaSolar and Reflections Solar Solutions. The battery is sold through some of the same channels — it turns up as “Deye Lithium Battery” listings on Lazada, and importers who carry the inverter line also list battery SKUs — but we couldn’t confirm a single authorized Philippine distributor for the Deye battery specifically, or find evidence of the installed base the inverter has. If you’re pairing a Deye inverter with a Deye battery, ask your installer directly how many they’ve actually commissioned before assuming it’s as proven a combination locally as Deye-inverter-plus-Pylontech-battery, which is the pairing installers report more often.
Price
We couldn’t confirm a public Philippine peso price specific to Deye’s battery modules — international listings exist, but pricing an import off a foreign site isn’t a substitute for a local quote. Use the general solar battery price guide anchor of ₱13,000-23,000 per usable kWh installed as your planning range, and get an itemized quote before committing. If you’re also pricing the inverter side, our hybrid inverter price guide covers that separately.
Where it falls short
The core problem isn’t the chemistry — it’s that Deye’s battery lacks the years of Philippine installed history that its own inverter has, and that brands like Pylontech and BYD have built specifically as batteries. No single Philippine distributor could be confirmed, no local peso pricing is published anywhere we could verify, and the installer base that knows how to service one is smaller. That’s a real gap when something needs warranty support five years from now.
Who it’s best for
Buyers already committed to a Deye hybrid inverter who want to stay single-brand and are working with an installer who can specifically vouch for having installed Deye’s battery line before — not just the inverter. Everyone else is probably better served pairing a Deye inverter with a battery brand that has a deeper local service history, like Pylontech or BYD. For the inverter side of this brand, see our Deye inverter review. Background on chemistry tradeoffs is in LiFePO4 vs. lead-acid batteries, and if you’re still deciding whether storage is worth it, read is a solar battery worth it.