Fox ESS Launches New EPS-BOX-SP: Whole Home Backup Now Available in the UK

Fox ESS have launched their EPS-BOX-SP, home backup gateway in the UK, having been available in the US since earlier this year. The gateway allows for backup power during power cuts and grid outages in the UK.

If you’re a solar panel owner, power cuts are more than just an inconvenience. When you’ve invested big into your home’s energy with solar power, the last thing you need is for that power supply to be interrupted through no fault of your own. From losing Wi-Fi and heating to risking food in the freezer or keeping vital medical equipment running, even a short outage can cause big problems.

Many solar panel and battery storage owners in the UK don’t actually realise this, but even with your renewable energy installed, unless you have a backup gateway, your home will still go dark during a power cut. That’s because UK solar systems must comply with G98 regulations, which state that for safety reasons, if the grid goes down, your solar and battery system must automatically shut off too.

However, Fox ESS’s new EPS-BOX-SP product is looking to change that. Read on to learn about Fox’s new backup gateway, it’s benefits, and how it affects you.

What is the Fox ESS EPS-BOX-SP?

The EPS-BOX-SP is a single-phase whole home backup gateway. It sits between your Fox ESS inverter, the grid, and your home’s circuits.

In normal conditions, it allows solar and grid power to flow as usual. During an outage, it instantly disconnects from the grid and powers your home directly from your solar & battery. When the grid comes back, it switches back seamlessly – meaning no flickers, no downtime.

As a result, your home will stay powered no matter what. Whether there’s extreme weather, local disruption or if the home’s down your street are out – the EPS-BOX-SP will keep your home’s appliances running.

Key Benefits for Homeowners

Here’s what makes the EPS-BOX-SP so valuable:

Whole Home Backup

Unlike traditional emergency power supply (EPS) units that only run a few sockets, this gateway keeps your entire home running – lights, appliances, heating, and Wi-Fi included.

Seamless Switching

The changeover happens instantly, so you won’t even notice when the grid goes down. No tripping over in the dark, no resetting devices.

High Power Handling

With up to 100A maximum input current, it’s more than capable of powering modern households with high electricity demands.

Works With Existing Systems

It’s fully compatible with Fox’s H1-G2, KH, EVO, and PowerQ inverters. Even better – it can be retrofitted to existing systems, so you don’t need a brand-new install to benefit.

Peace of Mind

From keeping your fridge cold to ensuring medical equipment stays online, the EPS-BOX-SP means your home won’t skip a beat – even in an unexpected outage.

Built for UK Homes

The EPS-BOX-SP isn’t just smart, it’s tough too.

• Durable Design – An IP65-rated metal enclosure makes it suitable for indoor or outdoor installation.
• Weather Ready – Performs across a wide temperature range (-25°C to +60°C).
• Low Maintenance – Natural cooling keeps it efficient without complicated servicing.
• Quick Installation – Compact wall-mounted unit that certified installers like Sunbright can easily integrate with your existing setup.

Why This Matters for UK Homeowners

While the UK doesn’t face frequent outages, extreme weather and an ageing grid are making them more common. For many families, especially those investing in solar and batteries, losing power is more than a nuisance – it undermines the very reason they went renewable.

With the EPS-BOX-SP, you’re not just buying technology – you’re buying peace of mind. You’ll know that when the unexpected happens, your home, your comfort, and your family are protected.

Where Can I Get the FOX ESS EPS-BOX-SP?

The Fox ESS EPS-BOX-SP takes home energy to the next level. By unlocking whole home backup, it ensures your investment in solar and storage delivers true independence from the grid.

It’s robust, easy to install, and available now in the UK for the very first time. Most reputable solar and renewable energy installers in the UK should supply the new Fox gateway.

We’re big advocates of Fox ESS here at Sunbright Energy, and the new gateway has only solidified our support for them.

Fox ESS have named us as Approved Partners, and the only Fox ESS Approved Partner in all of Kent, meaning we’re trained to install their system’s to the highest quality.

The EPS-BOX-SP available for installation in Kent, London, and all across the South East right now. Our expertise with Fox ESS products means we can both install the gateway to a brand new system, as well as retro-fitting it to existing, compatible Fox ESS solar systems.

Want to find out if the EPS-BOX-SP is right for your home? Contact Sunbright Energy today for expert advice and installation.

If you’d like to see exactly how much Solar Panels + a Fox Battery could save your home, use our Solar Savings Calculator below to get an instant estimate WITHOUT needing to enter your email.

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