Fox ESS Batteries in Scotland: Prices and Specs (2026)
Quick answerFox ESS EP5 and EP11 batteries typically cost £3,400–£6,000 installed in Scotland at 0% VAT, making them among the best-value home batteries in 2026. Both are stackable lithium iron phosphate units that pair with a Fox hybrid inverter. The modular EQ4800 is usually priced on quote after a survey.
Last updated: 30 October 2026 · Reviewed by the Scottish Energy Efficiency team
Fox ESS has become one of the most popular battery brands with UK installers, mainly because it offers solid lithium iron phosphate storage at a lower price than the premium names. This guide covers the EP series and the modular EQ4800, what they typically cost in Scotland and where they fall short.
How much does a Fox ESS battery cost in Scotland?
A Fox ESS EP5 or EP11 typically costs £3,400–£6,000 installed at 0% VAT, checked October 2026, depending on size and whether a Fox hybrid inverter is needed. The EQ4800 modular system is usually priced on quote. Typical 10kWh systems from any brand cost £5,500–£7,000 installed, for comparison.
| Model | Capacity per unit | Typical installed price |
|---|---|---|
| Fox ESS EP5 | 5.18kWh nominal | £3,400–£6,000 (EP series range) |
| Fox ESS EP11 | 10.36kWh nominal | £3,400–£6,000 (EP series range) |
| Fox ESS EQ4800 | 4.66kWh modules | Price on quote |
Typical installed ranges at 0% VAT, checked October 2026, varying ±20–30%. Larger stacks and a new inverter sit at the top of the range or above.
What is the difference between the Fox ESS EP series and EQ4800?
The EP5 and EP11 are high-voltage all-in-one battery units of about 5kWh and 10kWh that stack up to 41.4kWh. The EQ4800 uses smaller 4.66kWh modules that stack up to 41.9kWh, which lets an installer size the battery more precisely. Both use lithium iron phosphate cells and work with Fox hybrid inverters.
Are Fox ESS batteries any good?
For most Scottish homes they are good value: safe lithium iron phosphate chemistry, stackable capacity, a 10-year warranty on the EP series and a widely used app. The trade-offs are that power depends on the Fox inverter you choose, backup needs extra setup, and warranty retention is 70% rather than 80%.
- Pros: low price per kWh, stackable, LFP cells, widely installed
- Cons: needs a Fox inverter, backup is extra, 70% capacity warranty threshold
Can a Fox ESS battery be added to existing solar?
Usually yes, but it normally means fitting a Fox hybrid or AC-coupled inverter alongside or in place of your current solar inverter. If your solar inverter is old, replacing it with a Fox hybrid at the same time can be good value. Your installer checks the existing system at survey before quoting.
How do Fox ESS batteries compare with rivals?
Fox ESS is usually cheaper per kWh than the Tesla Powerwall 3 or Sigenergy SigenStor, but those offer more power from one unit and, in Sigenergy’s case, built-in EV charging options. Against other value brands such as Growatt or SolaX, Fox stands out for installer support and stack size.
Frequently asked questions
What warranty do Fox ESS batteries have?
The EP series carries a 10-year warranty to 70% capacity; the EQ4800 has a 12-year performance warranty to 70%, per Fox datasheets.
Can I add more Fox ESS capacity later?
Yes. EP batteries stack to 41.4kWh and EQ4800 modules to 41.9kWh, as long as your inverter supports it.
Do Fox ESS batteries work without solar?
Yes. They can charge from cheap overnight electricity on a time-of-use tariff and power your home at peak times.
Can I spread the cost?
Interest-free credit up to £30,000, subject to status.