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Fox ESS EVO 10E 3.7/5/8/10kW Hybrid Inverter 10.24kWh Battery
Regular price
£4,050.00
Inc. VAT
£3,375.00
Exc. VAT
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The Fox ESS EVO 10E (Gen 2) is a fully integrated all-in-one hybrid inverter and battery in a single, sleek unit, available as a 3.7kW (EVO10E-3.7-H), 5kW (EVO10E-5-H), 8kW (EVO10E-8-H) or 10kW (EVO10E-10-H) single-phase model. Every version includes the same 10.24kWh LiFePO₄ battery (9.73kWh usable at 95% depth of discharge), so you choose the inverter output to suit the home and the solar array, and get generation, storage and backup from one wall- or floor-mounted cabinet with one-step installation.
EPS off-grid backup keeps essential circuits running during a power cut with a switchover time under 4 ms. The IP66 enclosure and built-in battery warm-up function (operation down to -25°C) make it suitable for outdoor installation, and FoxCloud 2.0 monitoring via WiFi, LAN and Bluetooth lets you and your installer track performance remotely. The 8kW and 10kW models add a third MPPT input and accept up to 20kWp of PV. Storage can be grown later with up to 3 ET10 battery expansion units.
4
Output ratings: 3.7, 5, 8 and 10kW
10.24kWh
Integrated battery on every model
9.73kWh
Usable capacity per unit
97.62%
Max. efficiency (5kW to 10kW)
IP66
Outdoor-rated enclosure
-25°C
Operation with warm-up function
Choose your variant
All variants are single phase with the same 10.24kWh battery. Choose the output that matches your solar array and household demand.
Installation and grid connection
Installation, commissioning and grid connection must be carried out by a competent installer in line with BS 7671 and the manufacturer’s instructions. Home battery location should follow PAS 63100 guidance. The 3.7kW model has a rated output current of 16.0A at 230V, right at the 16A per phase G98 threshold, while the 5kW, 8kW and 10kW models exceed it, so confirm the correct G98/G99 notification or application route and any export limit with the DNO before installation.
Compatibility: expansion and parallel operation
Support for up to 3 ET10 expansion batteries and AC parallel operation of up to 3 units. Parallel operation is not currently available because the AI link has been discontinued, and that ET10 expansion units are expected from December 2026. Please confirm current availability before designing a system around either.
Weight and handling
Every model weighs 108kg. Plan safe lifting and a wall or floor fixing suitable for the load before delivery, and use appropriate lifting equipment.
Which output should I choose?
The battery is the same on every model, so the choice is about inverter output and PV capacity. The 3.7kW and 5kW models have 2 MPPT inputs and a 16kWp maximum array; the 8kW and 10kW models add a third MPPT and a 20kWp maximum array, suiting larger or multi-orientation roofs.
Key features
True all-in-one design
A fully integrated inverter and battery with a minimalist enclosure, wall- or floor-mounted, for effortless one-step installation.
10.24kWh LiFePO₄ battery
Safe, long-life LFP chemistry with 95% depth of discharge gives 9.73kWh of usable storage on every model, with up to 10kW of charge power.
2 or 3 MPPT solar inputs
80 to 550V operating range and 20A per input, with 2 MPPTs on the 3.7kW and 5kW and 3 MPPTs on the 8kW and 10kW, one string each on every tracker.
EPS backup power
Off-grid EPS output up to the rated power of each model with a switchover time under 4 ms keeps essential loads running during outages.
Built for outdoors
IP66 rating, intelligent air cooling and a battery warm-up function allow operation from -25°C to 55°C.
Smart and connected
FoxCloud 2.0 monitoring, WiFi, LAN and Bluetooth, optional 4G, plus SG Ready, DRM, ripple control, meter and EMS interfaces and export limit control.
Technical specification by model
Common specification
Frequently asked questions
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
Documentation
Downloads
Tools & Kits
Build your kit
Need a full system?
Design your complete solution in minutes with our kit builders.
Do you have a question
about this product?
One of our expert advisors will be happy to help you!
Contact Us