Fox ESS Single-Phase Auto Grid-To-Backup Power Switching Box

£383.32 ex VAT£459.98 inc VAT

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Product features

  • Seamless backup power switching
  • Compatible with Fox ESS inverters
  • Works with battery systems
  • Auto single-phase backup switching
  • Robust IP65 metal enclosure
  • Indoor or outdoor installation
Product code: EPS BOX-SP
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Description

The Fox ESS EPS BOX-SP Single-Phase Automatic Backup Switching Box is a high-reliability power continuity solution designed to seamlessly transition to automatic backup power during grid failures in your home or light commercial site. Working in harmony with a compatible Fox ESS battery and inverter system, the backup box ensures your essential circuits remain energised during outages, delivering dependable peace of mind where uninterrupted supply truly matters.

Engineered specifically for single-phase installations, this robust EPS unit handles the full switchover process automatically - eliminating the need for manual intervention and keeping your system running smoothly in all conditions. Its durable IP65-rated metal enclosure provides superior protection against dust, moisture and harsh UK weather, making it ideal for both indoor plant rooms and exposed outdoor locations.

Optimised for clean integration within the Fox ESS ecosystem, the EPS BOX-SP pairs effortlessly with the brand’s leading single-phase hybrid and AC-charger inverter series, including the H1, AC, KH and EVO ranges. Despite its industrial-grade build quality, the unit remains installer-friendly with a practical wall-mounted form factor that simplifies setup and reduces on-site installation time.

Naturally cooled for quiet, maintenance-free operation, the EPS BOX-SP offers long-term reliability without fans or moving parts. Acting as the intelligent control hub between your inverter and backup loads, it ensures your solar-plus-storage system provides resilient, uninterrupted energy even in challenging grid environments. While it does not generate its own power, it switches your property safely onto the inverter/battery backup source whenever required.

  • Automatic Single-Phase Backup Switching: Instantly redirects power from grid to inverter/battery during outages, keeping critical circuits energised without manual input
  • IP65 Weather-Protected Metal Enclosure: Durable, dust-tight and water-resistant housing suitable for both indoor and outdoor installation zones
  • Optimised for Fox ESS Single-Phase Systems: Seamless compatibility with H1, AC, KH and EVO inverter series for fast, clean integration
  • Installer-Friendly Wall-Mounted Design: Robust yet practical enclosure with straightforward wiring layout for efficient installation
  • Silent, Fan-Free Thermal Management: Natural cooling ensures quiet operation, reduced maintenance and long-term durability
  • Reliable EPS Control Hub: Intelligent switching logic coordinates grid, inverter and load connections for safe and stable backup performance
  • Switching Logic: Automatic changeover between on-grid supply and EPS backup mode
  • Compatible Inverters: Single-phase Fox ESS models - H1, AC, KH, EVO series
  • Enclosure Rating: IP65, fully dust-tight and resistant to rain and environmental exposure
  • Construction: Heavy-duty wall-mounted metal enclosure
  • Dimensions (H×W×D): 660mm x 515mm x 235mm | Net Weight: ~19.3kg

Why It Stands Out

  • Automatic Failover - Total Peace of Mind: With intelligent switching logic, the EPS Box‑SP automatically manages backup power transitions without manual intervention.
  • Built for All Climates: Its hardy construction and robust IP rating mean reliable operation across a variety of environmental conditions.
  • Installer-Friendly Form: Compact size and lightweight design make it easy to position within tight spaces, reducing labour and mounting effort.
  • System Compatibility: Specifically designed to work with Fox ESS single-phase ecosystem, ensuring optimal integration and performance.

Code: EPS BOX-SP

DELIVERY INFORMATION

Fast, reliable UK delivery

  • FREE UK delivery (2–3 working days) on orders over £99 exVAT (order before 4pm)*.
  • Orders under £99 exVAT are charged £6 inc VAT (£5 exVAT).
  • Need it quickly? Choose from our Next Working Day & Saturday delivery options below (order before 2pm).

Delivery options & rates

Delivery OptionDelivery TimeCost
Standard Delivery2-3 working days£6.00 (£5.00 exVAT)
FREE Standard Delivery (orders over £99 exVAT)*2-3 working daysFREE
Next Working Day Delivery (order before 2pm)Next working day£9.99 (£8.33 exVAT)*
Next Working Day by 12pm  (order before 2pm)Next working day£20.00 (£16.67 exVAT)
Next Working Day by 10:30am  (order before 2pm)Next working day£21.60 (£18.00 exVAT)
Saturday Delivery  (order before 2pm Friday)    Next working day£20.00 (£16.67 exVAT)
Northern Ireland, Highland  & Islands Delivery  3-5 working days£9.99 (£8.33 exVAT)

Important: Orders placed after 2pm on Friday (or over the weekend) are processed on Monday for next working day delivery. Next Day & Saturday Delivery options NOT available on all products.

*FREE Standard & Next day delivery available on select products and will be clearly shown on the product page.


What to expect

  • We dispatch Monday - Friday (excluding public holidays).
  • Once dispatched, you’ll receive tracking information (where available).
  • If delivery is delayed for any reason, we’ll contact you as soon as possible with an updated estimate.

Please note: we cannot be held responsible for missed deliveries. Customers are advised to check their spam or junk folder to ensure tracking information and estimated delivery details are received.


Specialist product delivery

Some products require specialist handling:

  • For Portable power please allow up to 4 working days for delivery.
  • Solar panels are shipped via our £100 pallet delivery service.
  • In some cases a third-party supplier may fulfil your order directly.

Delivery areas & restrictions

  • Northern Ireland, Scottish Highlands & Channel Islands: please contact us for shipping rates.
  • Portable power to Northern Ireland: we can’t currently ship these items due to insurance issues with the courier.
  • International delivery: unfortunately we do not currently offer international shipping.

Questions, problems, or returns?

RETURN POLICY

Last updated May 23, 2024

Thank you for your purchase, we hope you are happy with it.

However, if you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund, store credit, or an exchange; please see below for more information on our returns policy.

RETURNS

If you find you have received the wrong or damaged item(s), you need to contact us within 7 days of receipt of goods. Any time after this you are responsible for returning the goods at your own cost following the standard returns process.

All returns must be postmarked and in writing within fourteen (14) days of the purchase date. All returned items must be in a new, unopened and unused condition, with all original tags and labels attached.


RETURN PROCESS

To return an item, please click the ‘Download Returns Form’ below and complete all data fields. You can then email this to our team once completed.
Place your item(s) securely in its original packaging along with the returns form.
Please note that the RMA# on the returns address is your original order number; please ensure to reference this on the returns address, as per below.
You are now ready to mail your return to the following address:

Attn: Returns
RMA #/Order No -
Eco WizardUnderfloor Wizard Ltd t/a ECO Wizard
Beechfield House
Winterton Way
Macclesfield
Cheshire
SK11 0LP
United Kingdom

We ask that all customers when returning products send the goods via a trackable courier service. Underfloor Wizard Ltd t/a ECO Wizard will not be held responsible for goods which do not arrive at our premises.

Please note, you will be responsible for all return shipping charges, unless in the instance of damaged/faulty goods received in which case we can issue you with a returns label to cover the cost of postage.

Download Returns Form

REFUNDS

After receiving your return and inspecting the condition of your item, we will process your return or exchange. Please allow at least seven (7) days from the receipt of your item to process your return or exchange. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company. We will notify you by email when your return has been processed.

Faults on installed products: 

If a product that has been installed develops a fault, please contact us, do not uninstall the product yourself. We will arrange for an engineer or technical support from the brand to assist with diagnosing the fault. Once the fault has been confirmed we can then arrange for the necessary next steps to occur.


EXCEPTIONS

The following items cannot be returned or exchanged:

  • opened box, damaged, missing or incomplete items cannot be returned.
  • items that have been installed.


QUESTIONS
If you have any questions concerning our return policy, please contact us at: returns@ecowizard.co.uk

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