Enphase IQ Battery 5P with FlexPhase vs Marstek Venus E
Usable capacity: Enphase IQ Battery 5P with FlexPhase 5 kWh, Marstek Venus E 5.12 kWh. Both models win equally often (1 of 6 points).
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Both models in detail
Who wins where
- Enphase IQ Battery 5P with FlexPhase
- Marstek Venus E
Biggest differences
| Fact | IQ Battery 5P with FlexPhase | Venus E |
|---|---|---|
| Warranty | 15 years | 10 years |
| Usable capacity | 5 kWh | 5.12 kWh |
Score per area = position (0–100) relative to all 140 models in this category; higher is better.
| Technical specifications | EnphaseIQ Battery 5P with FlexPhase | MarstekVenus E |
|---|---|---|
| General | ||
| Cell chemistry | LFP1 | LFP2 |
| Wi-Fi / app | Yes1 | Yes2 |
| Performance | ||
| Usable capacity | 5 kWh1 | 5.12 kWh✓2 |
| Nominal capacity | – | 5.12 kWh2 |
| Charge power (continuous) | – | 2.5 kW2 |
| Efficiency | ||
| Round-trip efficiency | 90 %1 | – |
| Electrical | ||
| Coupling | AC-coupled1 | AC-coupled2 |
| Phases | 31 | – |
| Backup power | Yes1 | Yes2 |
| Off-grid capable | – | Yes2 |
| Dimensions & weight | ||
| IP rating | IP551 | IP652 |
| Min. operating temperature | -20 °C1 | -20 °C2 |
| Width | 550 mm1 | 560 mm2 |
| Height | 980 mm1 | 690 mm2 |
| Depth | 188 mm1 | 201 mm2 |
| Weight | 83 kg1 | – |
| Warranty & lifespan | ||
| Warranted cycles | 6,0001 | 6,0002 |
| Warranty | 15 years✓1 | 10 years2 |
Frequently asked questions
Which is better: the Enphase IQ Battery 5P with FlexPhase or the Marstek Venus E?
Usable capacity: Enphase IQ Battery 5P with FlexPhase 5 kWh, Marstek Venus E 5.12 kWh. Both models win equally often (1 of 6 points).
What is the usable capacity of the Enphase IQ Battery 5P with FlexPhase and the Marstek Venus E?
Enphase IQ Battery 5P with FlexPhase: 5 kWh. Marstek Venus E: 5.12 kWh.
Which is better on warranty: the Enphase IQ Battery 5P with FlexPhase or the Marstek Venus E?
Enphase IQ Battery 5P with FlexPhase: 15 years. Marstek Venus E: 10 years.
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How we collect and check this data →
Sources
- IQ Battery 5P with FlexPhase – EMEA data sheet, DSH-00477-9.0-EN-2026-08-21 — Enphase Energy, Inc. · accessed Sep 27, 2026
- MARSTEK VENUS C / E AC-Coupled Energy Storage System, 1.0 — Marstek · accessed Oct 16, 2026