Deye AI-W5.1-12P3-EU-B vs Enphase IQ Battery 5P with FlexPhase
Usable capacity: Deye AI-W5.1-12P3-EU-B 5.12 kWh, Enphase IQ Battery 5P with FlexPhase 5 kWh. The Deye AI-W5.1-12P3-EU-B is better on 3 of 7 comparable points.
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Both models in detail
Who wins where
- Deye AI-W5.1-12P3-EU-B
- Enphase IQ Battery 5P with FlexPhase
Biggest differences
| Fact | AI-W5.1-12P3-EU-B | IQ Battery 5P with FlexPhase |
|---|---|---|
| Weight | 53 kg | 83 kg |
| Warranty | 10 years | 15 years |
| Round-trip efficiency | 95.5 % | 90 % |
| Usable capacity | 5.12 kWh | 5 kWh |
Score per area = position (0–100) relative to all 140 models in this category; higher is better.
| Technical specifications | DeyeAI-W5.1-12P3-EU-B | EnphaseIQ Battery 5P with FlexPhase |
|---|---|---|
| General | ||
| Cell chemistry | LFP1 | LFP2 |
| Wi-Fi / app | Yes1 | Yes2 |
| Performance | ||
| Usable capacity | 5.12 kWh✓1 | 5 kWh2 |
| Nominal capacity | 5.12 kWh1 | – |
| Expandable up to | 184 kWh1 | – |
| Efficiency | ||
| Round-trip efficiency | 95.5 %✓1 | 90 %2 |
| Electrical | ||
| Coupling | – | AC-coupled2 |
| Phases | – | 32 |
| Backup power | – | Yes2 |
| Off-grid capable | Yes1 | – |
| Dimensions & weight | ||
| IP rating | IP651 | IP552 |
| Min. operating temperature | -20 °C1 | -20 °C2 |
| Width | 720 mm1 | 550 mm2 |
| Height | 300 mm1 | 980 mm2 |
| Depth | 255 mm1 | 188 mm2 |
| Weight | 53 kg✓1 | 83 kg2 |
| Warranty & lifespan | ||
| Warranted cycles | 6,0001 | 6,0002 |
| Warranty | 10 years1 | 15 years✓2 |
Frequently asked questions
Which is better: the Deye AI-W5.1-12P3-EU-B or the Enphase IQ Battery 5P with FlexPhase?
Usable capacity: Deye AI-W5.1-12P3-EU-B 5.12 kWh, Enphase IQ Battery 5P with FlexPhase 5 kWh. The Deye AI-W5.1-12P3-EU-B is better on 3 of 7 comparable points.
What is the usable capacity of the Deye AI-W5.1-12P3-EU-B and the Enphase IQ Battery 5P with FlexPhase?
Deye AI-W5.1-12P3-EU-B: 5.12 kWh. Enphase IQ Battery 5P with FlexPhase: 5 kWh.
Which is better on weight: the Deye AI-W5.1-12P3-EU-B or the Enphase IQ Battery 5P with FlexPhase?
Deye AI-W5.1-12P3-EU-B: 53 kg. Enphase IQ Battery 5P with FlexPhase: 83 kg.
Which is better on warranty: the Deye AI-W5.1-12P3-EU-B or the Enphase IQ Battery 5P with FlexPhase?
Enphase IQ Battery 5P with FlexPhase: 15 years. Deye AI-W5.1-12P3-EU-B: 10 years.
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How we collect and check this data →
Sources
- AI-W5.1-5/6/8/10/12P3-EU-B-ESS All-in-one Energy Storage System, V3.0 — NINGBO DEYE ESS TECHNOLOGY CO., LTD · accessed Oct 17, 2026
- IQ Battery 5P with FlexPhase – EMEA data sheet, DSH-00477-9.0-EN-2026-08-21 — Enphase Energy, Inc. · accessed Sep 27, 2026