Enphase IQ Battery 5P vs SolarEdge Home Battery 400V
Enphase IQ Battery 5P stores 5 kWh per unit, expanding to 35 kWh. SolarEdge Home Battery 400V stores 9.7 kWh per unit, expanding to 29.1 kWh. Across the setups we list, continuous power is 3.2–9.6 kW for the IQ Battery 5P and 3.68–6 kW for the Home Battery 400V. Warranty: 15 years vs 10 years.
Figures from manufacturer documents, last checked 26 Sept 2026. We don't rank products or take payment for results.
How they're built
Enphase IQ Battery 5P
AC-coupled battery with six built-in IQ8D-BAT microinverters.
Backup: IQ System Controller 3 INT (plus IQ Gateway Metered and Communications Kit).
SolarEdge Home Battery 400V
DC-coupled battery; needs a SolarEdge single-phase inverter (Home Hub, Home Wave or StorEdge).
Backup: SolarEdge Backup Interface (bought separately) with the Home Hub inverter.
Side by side
| Specification | Enphase IQ Battery 5P | SolarEdge Home Battery 400V |
|---|---|---|
| Usable capacity (per unit) | 5 kWhIncludes a 2% safety limit and 3% overnight electronics reserve (footnote 3)Enphase datasheet, p.2, Battery: Usable capacity | 9.7 kWhPer battery, 100% depth of dischargeSolarEdge datasheet, p.2 |
| Battery chemistry | LFP (lithium iron phosphate)Enphase datasheet, p.2 | Not documented |
| Maximum usable storage (expanded) | 35 kWhcalculatedSingle-phase UK backup systemEnphase manual | 29.1 kWhcalculatedPer inverterSolarEdge datasheet |
| How it expands | Up to 7 IQ Battery 5P units with IQ System Controller 3 INT (UK, single phase)Enphase manual, System sizing guidelines | Up to 3 batteries per inverterSolarEdge datasheet, p.2, Batteries Per Inverter |
| Continuous power (per unit) | 3.2 kW3.2 kVA per battery (13.91 A)Enphase datasheet, p.2 | 5 kWPer battery; the system's total is capped at the inverter's rated AC powerSolarEdge datasheet, p.2, Continuous Output Power |
| Peak power | 6.4 kWcalculatedEnphase datasheet, p.2, Peak output current (3 s) 27.82 A at 230 V, backup operation | 7.5 kWPer battery, in backup, for 10 secondsSolarEdge datasheet, p.2, Peak Output Power in Backup |
| Round-trip efficiency | 90%AC → battery → AC at 50% power, 25°C, beginning of lifeEnphase datasheet, p.2, footnote 2 | 94.5%Peak figure (stated as > 94.5%)SolarEdge datasheet, p.2, Peak Roundtrip Efficiency |
| Architecture | AC-coupled battery with six built-in IQ8D-BAT microinvertersEnphase datasheet, p.1 | DC-coupled battery; needs a SolarEdge single-phase inverter (Home Hub, Home Wave or StorEdge)SolarEdge datasheet, p.2, Compatible Inverters |
| Max solar input | Not documented | 7.36–12 kWSE3680H: 7.36 kW · SE5000H: 10 kW · SE6000H: 12 kWSolarEdge datasheet, p.2, Maximum DC PV Power |
| Backup needs | IQ System Controller 3 INT (plus IQ Gateway Metered and Communications Kit)Enphase datasheet, p.4, Compatibility | SolarEdge Backup Interface (bought separately) with the Home Hub inverterSolarEdge datasheet, p.2, Smart energy capabilities |
| Indoor / outdoor | Outdoor rated (IP55)Enphase datasheet, p.2 | Not documented |
| Dimensions | 980 × 550 × 188H × W × DEnphase datasheet, p.2 | 790 × 1179 × 250W × H × DSolarEdge datasheet, p.2 |
| Weight | 82 kgTotal installed weight (68.5 kg lifting weight)Enphase datasheet, p.2 | 119 kgSolarEdge datasheet, p.2 |
| Warranty (UK) | 15 yearsOr 6,000 cycles, whichever first; restrictions applyEnphase datasheet, p.3, Limited warranty | 10 yearsSolarEdge warranty, p.1 |
| Capacity guaranteed at end of warranty | 60%More than 60% capacityEnphase datasheet, p.3 | 70%At the end of the warrantySolarEdge warranty, p.1, Energy Retention |
| Warranty conditions | Not documented | Must stay connected to an approved SolarEdge inverter and SolarEdge monitoring for the whole warranty. Ambient temperature must be 0–40°C for at least 95% of the time.SolarEdge warranty, p.1, General Guidelines |
How long each runs your home in a power cut
Every setup we list for both, from a full battery with no solar. Appliance figures are typical estimates; use the calculator below with your own.
| Setup | Usable | Continuous | Essentials (fridge-freezer, lights, Wi-Fi, TV, charging) | Essentials + air-source heat pump (winter) |
|---|---|---|---|---|
| Enphase IQ Battery 5P · 1 × IQ Battery 5P | 5 kWh | 3.2 kW | 30.4 hours | 2.9 hours |
| Enphase IQ Battery 5P · 2 × IQ Battery 5P | 10 kWh | 6.4 kW | 2 days 13 hours | 5.7 hours |
| Enphase IQ Battery 5P · 3 × IQ Battery 5P | 15 kWh | 9.6 kW | 3 days 19 hours | 8.6 hours |
| SolarEdge Home Battery 400V · Home Hub SE3680H + 1 battery (9.7 kWh) | 9.7 kWh | 3.68 kW | 2 days 11 hours | 5.6 hours |
| SolarEdge Home Battery 400V · Home Hub SE5000H + 1 battery (9.7 kWh) | 9.7 kWh | 5 kW | 2 days 11 hours | 5.6 hours |
| SolarEdge Home Battery 400V · Home Hub SE6000H + 2 batteries (19.4 kWh) | 19.4 kWh | 6 kW | 4 days 22 hours | 11.1 hours |
| SolarEdge Home Battery 400V · Home Hub SE6000H + 3 batteries (29.1 kWh) | 29.1 kWh | 6 kW | 7 days 9 hours | 16.7 hours |
Try your own appliances
Average draw 156 W from 4.75 kWh available.
Everything on at once: 415 W — within the 3.2 kW limit
- Starts from a full battery with 0% held back as reserve.
- 5% extra allowed for wiring and standby losses on top of the manufacturer's usable figure.
- Appliance figures are typical averages; your own may differ. Enter your own wattage for the most accurate result.
- Assumes no solar recharging during the outage.
- IQ Battery 5P: Works with Enphase IQ7/IQ8 microinverters and, with an extra contactor, third-party string inverters. It does not work alongside the older Enphase AC Battery.
- IQ Battery 5P: Peak power is calculated from the peak current in the datasheet.
- IQ Battery 5P: Continuous and peak power per battery add up when several are installed, because each battery has its own microinverters.
- Home Battery 400V: SolarEdge blocks automated downloads, so our archived datasheet is the October 2022 edition. We checked the key figures against the July 2024 edition on SolarEdge's site.
- Home Battery 400V: Only works with SolarEdge inverters. It can't be added to another brand's solar inverter.
- Home Battery 400V: Using a wired RS485 link instead of SolarEdge Home Network can reduce usable energy to 9.5 kWh, according to the datasheet.
Questions people ask
Which stores more, Enphase IQ Battery 5P or SolarEdge Home Battery 400V?
Enphase IQ Battery 5P has the higher stated maximum. Enphase IQ Battery 5P: up to 35 kWh (single-phase UK backup system). SolarEdge Home Battery 400V: up to 29.1 kWh (per inverter). Per unit, Enphase IQ Battery 5P stores 5 kWh and SolarEdge Home Battery 400V stores 9.7 kWh.
Which can run more appliances at once?
Across the setups we list, Enphase IQ Battery 5P delivers 3.2–9.6 kW continuously and SolarEdge Home Battery 400V delivers 3.68–6 kW. These are the maximums for each setup; installers can set some systems lower. Continuous power limits how many appliances can run at the same time; capacity decides how long they run.
Which has the better warranty?
Enphase IQ Battery 5P: 15 years, 60% capacity guaranteed at the end. SolarEdge Home Battery 400V: 10 years, 70% capacity guaranteed at the end. Conditions differ, so check the warranty rows in the table above.
Do Enphase IQ Battery 5P and SolarEdge Home Battery 400V work with Intelligent Octopus Flux?
Enphase IQ Battery 5P: On Octopus's integration list. SolarEdge Home Battery 400V: On Octopus's integration list. Octopus lists the battery brands it can control in its Intelligent Flux FAQ; see our Intelligent Octopus Flux page for details.
Other comparisons
Sources
- IQ Battery 5P data sheet (United Kingdom) — Enphase, DSH-00857-1.0. Retrieved 26 Sept 2026.
- Enphase Energy System planning guide — single-phase backup systems (UK) — Enphase, TEB-00305-1.0, July 2025. Retrieved 26 Sept 2026.
- SolarEdge Home Battery 400V For Europe (BAT-10K1P) datasheet — SolarEdge, DS-000164-EU. Retrieved 26 Sept 2026.
- SolarEdge Home Hub Inverter Single Phase, for Europe (SE2500H–SE10000H) — SolarEdge, DS-000198-EU. Retrieved 26 Sept 2026.
- Limited SolarEdge Home Battery 400V Warranty — SolarEdge, Effective 1 Jan 2026. Retrieved 26 Sept 2026.
- Intelligent Octopus Flux: Frequently Asked Questions — Octopus Energy. Retrieved 26 Sept 2026.
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