Enphase IQ Battery 5P
The Enphase IQ Battery 5P stores 5 kWh usable. AC-coupled battery with six built-in IQ8D-BAT microinverters. Running essentials only, a full 1 × IQ Battery 5P lasts about 30.4 hours in a power cut.
An AC-coupled 5 kWh battery with six built-in microinverters, so it can be added to most existing solar systems. Up to seven can be combined in the UK.
Last checked 26 Sept 2026 · Sources listed at the bottom of the page
- 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.
- Peak power is calculated from the peak current in the datasheet.
- Continuous and peak power per battery add up when several are installed, because each battery has its own microinverters.
How long will it run your home?
Pick a setup and tick what you want to keep running. The maths is shown below the result.
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.
Setups you can buy
| Setup | Usable energy | Continuous power |
|---|---|---|
| 1 × IQ Battery 5P | 5 kWh | 3.2 kW |
| 2 × IQ Battery 5P | 10 kWhcalculated | 6.4 kWcalculated |
| 3 × IQ Battery 5P | 15 kWhcalculated | 9.6 kWcalculated |
Full specifications
| Specification | Value | Source |
|---|---|---|
| Capacity | ||
| Usable capacity (per unit) | 5 kWhIncludes a 2% safety limit and 3% overnight electronics reserve (footnote 3) | Enphase datasheetp.2, Battery: Usable capacity |
| Total (nominal) capacity | Not documented in the sources we hold | |
| Depth of discharge | Not documented in the sources we hold | |
| Battery chemistry | LFP (lithium iron phosphate) | Enphase datasheetp.2 |
| System | ||
| Maximum usable storage (expanded) | 35 kWhcalculatedSingle-phase UK backup systemHow: 7 × 5.0 kWh | Enphase manual |
| How it expands | Up to 7 IQ Battery 5P units with IQ System Controller 3 INT (UK, single phase) | Enphase manualSystem sizing guidelines |
| Maximum system power (expanded) | Not documented in the sources we hold | |
| Architecture | AC-coupled battery with six built-in IQ8D-BAT microinverters | Enphase datasheetp.1 |
| Grid connection | Single phase, 230 V, 50 Hz | Enphase datasheetp.2 |
| Power | ||
| Continuous power (per unit) | 3.2 kW3.2 kVA per battery (13.91 A) | Enphase datasheetp.2 |
| Peak power | 6.4 kWcalculatedHow: 1 × 27.82 A × 230 V ≈ 6.4 kVA for 3 seconds | Enphase datasheetp.2, Peak output current (3 s) 27.82 A at 230 V, backup operation |
| Peak duration | 3 sDuring backup operation | Enphase datasheetp.2, footnote 1 |
| Max charge power | Not documented in the sources we hold | |
| Round-trip efficiency | 90%AC → battery → AC at 50% power, 25°C, beginning of life | Enphase datasheetp.2, footnote 2 |
| Solar | ||
| Max solar input | Not documented in the sources we hold | |
| Solar MPPT inputs | Not documented in the sources we hold | |
| Backup | ||
| Backup switchover time | Not documented in the sources we hold | |
| Backup needs | IQ System Controller 3 INT (plus IQ Gateway Metered and Communications Kit) | Enphase datasheetp.4, Compatibility |
| Physical | ||
| Ingress rating | IP55 enclosure; IP67 microinverters | Enphase datasheetp.2, Mechanical data |
| Indoor / outdoor | Outdoor rated (IP55) | Enphase datasheetp.2 |
| Operating temperature | −20°C to 55°C discharging; −20°C to 50°C charging | Enphase datasheetp.2 |
| Dimensions | 980 × 550 × 188H × W × D | Enphase datasheetp.2 |
| Weight | 82 kgTotal installed weight (68.5 kg lifting weight) | Enphase datasheetp.2 |
| Mounting | Wall (bracket included) or floor with pedestal (sold separately) | Enphase datasheetp.2 |
| Warranty | ||
| Stated cycle life | 6,000 cyclesAs the warranty limit | Enphase datasheetp.3, Limited warranty |
| Warranty (UK) | 15 yearsOr 6,000 cycles, whichever first; restrictions apply | Enphase datasheetp.3, Limited warranty |
| Capacity guaranteed at end of warranty | 60%More than 60% capacity | Enphase datasheetp.3 |
| Warranty throughput limit | Not documented in the sources we hold | |
| Warranty conditions | Not documented in the sources we hold | |
| Compliance | ||
| UK grid compliance | G98, G98 NI, G99, G99 NI, G100-2 | Enphase datasheetp.3, Standards |
Questions people ask
How much usable capacity does the Enphase IQ Battery 5P have?
5 kWh (Includes a 2% safety limit and 3% overnight electronics reserve (footnote 3)).
Can the Enphase IQ Battery 5P be expanded?
Up to 7 IQ Battery 5P units with IQ System Controller 3 INT (UK, single phase). Maximum usable storage: 35 kWh (calculated).
How long will the Enphase IQ Battery 5P run a house in a power cut?
Running essentials only (fridge-freezer, lights, Wi-Fi, TV and device charging, about 156 W on average), a full 1 × IQ Battery 5P lasts roughly 30.4 hours. Heavy loads such as a heat pump, electric shower or EV charger cut this sharply. Use the calculator on this page with your own appliances.
What warranty does the Enphase IQ Battery 5P have in the UK?
15 years, guaranteeing 60% of capacity. Or 6,000 cycles, whichever first; restrictions apply.
What does the Enphase IQ Battery 5P need to provide backup power?
IQ System Controller 3 INT (plus IQ Gateway Metered and Communications Kit).
Compare with
Tesla Powerwall 3
An all-in-one home battery with a built-in solar inverter. One unit stores 13.5 kWh and can be expanded with up to three Expansion units.
Sigenergy SigenStor
A stackable system: a Sigen Energy Controller (hybrid inverter) with 1–6 battery modules of 5.2 or 7.8 kWh usable each.
Fox ESS EVO 10
An all-in-one battery and hybrid inverter with 10.24 kWh of LFP storage, sold in 5, 8 and 10 kW versions. Up to three units can run in parallel.
myenergi libbi
A UK-designed modular battery with a 3.68 kW or 5 kW hybrid inverter and 1–4 battery modules (4.6 kWh usable each). Built to work with myenergi's zappi and eddi.
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. Retrieved 26 Sept 2026.
Spotted an error? Every figure above links to the document it came from. See how we check data.