Fox-ESS produces some of the best-value premium batteries on the market — EP5 modular range, 5.2-15.6kWh stackable, excellent app, integrated EV-charging logic, and strong residential / light-commercial performance.
✓Competitive pricing — typically 15-20% below Tesla Powerwall
Fox-ESS range
EP5 — modular battery in 5.2kWh blocks, stackable to 15.6kWh on a single inverter. Strong combined inverter + battery options for new installs (H1, H3, ECS). All variants LiFePO4 chemistry.
Best use cases
Fox-ESS particularly suits households that want a strong combined system at a competitive price — the H1 hybrid inverter + EP5 battery combination is a popular "all Fox" install at around £8,500-£10,000 retrofit on existing solar, or £14,500-£17,000 for new solar + battery turnkey.
Frequently asked questions about fox-ess battery installation
Fox-ESS vs Tesla Powerwall — which?▼
Tesla Powerwall is the premium option — 13.5kWh in a single unit, whole-home backup, IP67 outdoor rating. Fox-ESS EP5 is the value option — modular 5.2kWh blocks you can grow over time, a slick app, strong EV-charger integration, and typically 15-20% lower cost. Similar 10-year warranty terms. We model both in your quote.
Upgrade any package to the Fox ESS EP12 (11.52kWh) for £995.
All package prices assume every panel fits on a single roof elevation. The price covers the cost of scaffolding to one elevation. If your roof needs scaffolding on more than one elevation, or has restricted access, that additional cost is quoted separately after survey. Prices include VAT. Domestic solar and battery storage is zero-rated for VAT until 31 March 2027. Subject to a free technical survey. We will confirm the final price in writing before any work is booked.