Fox ESS · Solar inverter model
AIO-H3
Fox ESS AIO-H3 is a legacy three-phase all-in-one hybrid system combining a 5 to 10 kW inverter with 10.4 kWh of battery capacity in version 3.2.
Specifications
| Specification | Value |
|---|---|
| Type | all-in-one hybrid battery system |
| Supply phases | three |
| Rated AC power (kW) | 5, 6, 8 and 10 |
| Maximum DC input (kW) | 6, 8, 10 and 13 |
| MPPT count | 2 |
| Maximum input current (A) | 14 per MPPT on 5 and 6 kW; 26 on the first MPPT and 14 on the second for 8 and 10 kW |
| Maximum efficiency (%) | 97.8 |
| Euro efficiency (%) | 97 |
| Battery compatible | yes; integrated high-voltage battery |
| Battery-voltage range (V) | 180 to 234 |
| Warranty (years) | 5 from installation, capped at 65 months from manufacture; AIO excluded from FoxPro |
| IP rating | IP65 |
| Nominal capacity (kWh) | 10.4 |
| Cell chemistry | LFP |
| Maximum battery current (A) | 26 |
| Dimensions (mm) | 630 × 1,662 × 389 |
| Weight before batteries (kg) | 97 |
| Cooling | natural |
| EPS output | model-rated with the specified EPS box |
| EPS changeover (ms) | <1.5 with the specified EPS box |
| FoxPro extension | excluded |
Fox ESS AIO-H3 is an earlier three-phase all-in-one storage system. It combines a hybrid solar inverter, high-voltage battery modules and cabinet. An official Fox ESS regional library retains its documents, but as of 23 July 2026 the current UK range highlights newer all-in-one products. Current UK supply of AIO-H3 itself is unconfirmed.
Hybrid cabinet and model codes
Version 3.2 covers a defined inverter and battery build. The full inverter code and module labels identify an installed cabinet more precisely than the broad AIO-H3 name.
| Cabinet/inverter code | Rated AC output | Maximum PV input | Battery build |
|---|---|---|---|
AIO-H3-5.0 |
5 kW | 6 kW | HS10.4: one BMS BOX HV and four HV2600 modules |
AIO-H3-6.0 |
6 kW | 8 kW | HS10.4: one BMS BOX HV and four HV2600 modules |
AIO-H3-8.0 |
8 kW | 10 kW | HS10.4: one BMS BOX HV and four HV2600 modules |
AIO-H3-10.0 |
10 kW | 13 kW | HS10.4: one BMS BOX HV and four HV2600 modules |
AIO-AC3-5.0 is the storage-only AC-coupled form in the same cabinet manual. It is not one of the AIO-H3 hybrid codes.
This is a hybrid system: solar strings and the battery both connect through the cabinet’s inverter. AIO-AC1 is different because it is storage-only and relies on a separate solar inverter. The two names should not be shortened to a generic Fox AIO in system records.
Rating label, EPS and warranty records
An installed unit’s rating label, battery-module labels and original handover pack establish the exact build. Current H3 Smart and H3 Pro documents do not replace the AIO-H3 instructions.
The EPS box is part of the backup arrangement. Battery capacity on its own does not identify the circuits connected to it.
All-in-one does not mean every part has one warranty. Fox ESS’s UK battery policy says inverter and charge-controller electronics inside an all-in-one product are covered separately. Their standard inverter cover runs for 60 months from installation but no later than 65 months from manufacture, and AIO is excluded from the FoxPro extension. Both sets of terms belong with the invoice, commissioning date and serial numbers.
For replacement work, current H3 Smart and H3 Pro specifications must not be applied to AIO-H3. They are separate inverter generations with different power ranges, battery limits and installation documents.
Related entries
Brand
Reference type
Solar inverter model
Last reviewed
31 Jul 2026
Current status
UK new-supply status is unconfirmed.