Fox ESS EP5-H 5.18kWh Battery with Heating Element

Fox ESS EP5-H: The Weather-Ready 5.18kWh High Voltage Battery for UK Solar Storage

The Fox ESS EP5-H delivers efficient, high-voltage battery storage in a sleek, compact design built for year-round performance. Engineered with a built-in heater and IP65 protection, it operates reliably even in sub-zero temperatures , making it ideal for UK homes and small commercial applications seeking uninterrupted solar storage, no matter the weather.

Built-in Heating for Cold Climate Resilience

The integrated heating element ensures the EP5-H continues charging and discharging even when ambient temperatures drop to –25°C. This feature eliminates the typical downtime experienced with many lithium batteries in winter, offering enhanced system uptime and usability throughout the year.

• Warming mode activates automatically for sub-zero protection
• Charge/discharge supported from –25°C to +55°C
• Ideal for outdoor or unheated installations

Compact, Scalable Design for Versatile Installations

With a 5.18kWh capacity per unit, the EP5-H is ideal for single-inverter setups or expandable up to 20.7kWh by connecting up to four units in parallel. Its wall or floor mounting options and slim 147mm profile make it flexible for homes, garages, and tight utility rooms.

• Up to 4 units in parallel for larger storage requirements
• Wall or floor mountable with natural convection cooling
• Compact dimensions: 380 × 625 × 147 mm

High Efficiency and Long-Term Value

Designed using prismatic LiFePO₄ cells, the EP5-H boasts a cycle life of ≥4000 cycles at 90% DoD and maintains ≥95% round-trip efficiency. It’s engineered for longevity, reliability, and consistent performance across a 10-year warranty period.

• ≥95% round-trip efficiency for reduced energy loss
• ≥4000 cycles with 90% usable depth of discharge
• Backed by a 10-year manufacturer warranty

Reliable Safety & Protection for Residential Use

The EP5-H includes multiple layers of protection to ensure safe, long-term operation. It meets IEC62619 and UN38.3 standards, includes natural convection cooling, and is IP65 rated for dust and water resistance. Whether wall- or floor-mounted, it can be safely installed indoors or out.

• IP65-rated enclosure for outdoor or indoor use
• Certified to IEC and UN transport and safety standards
• Natural cooling system with no moving parts

Why Evergy Recommends This Product

The EP5-H is ideal for customers who want dependable solar storage that won’t fail in the colder months. It’s a smart match for hybrid inverters, compact installations, and UK households seeking grid independence with minimal fuss.

• Excellent cold-weather performance with integrated heating
• Pairs with compatible Fox ESS hybrid inverters
• Great fit for small homes, garages, or off-grid cabins

Ideal for Small-Scale Solar Installations

The EP5-H is tailored for 1–3 bedroom homes or light commercial premises that need reliable energy storage without taking up excessive space. It enables load shifting, self-consumption, and energy security all year round.

Key Technical Specifications

• Nominal Energy: 5.18 kWh
• Dimensions: 380 × 625 × 147 mm
• Weight: 50.5 ± 2 kg
• Operating Temp: –25°C to +55°C (with heating)

For full technical details, see the product specification tab or download the official datasheet.

Complete Your Solar Setup

Pair this battery with our full range of solar PV panels, inverters, and mounting systems for a complete energy solution. Want to boost performance? Explore system optimisers or read our guide to the best solar batteries in the UK.

FAQs

Q: Can the EP5-H be used outdoors in winter?
A: Yes – it includes a built-in heating system allowing charging and discharging down to –25°C.

Q: Is this battery compatible with other inverter brands?
A: It’s designed to work seamlessly with Fox ESS hybrid inverters. Always check compatibility or contact Evergy for guidance.