2 Year Manufacturer Warranty ★ Ideal for * Fox ESS single-phase storage systems needing backup changeover * H1-G2, AC1-G2 and KH/KA installations * Homes specifying whole-home backup behaviour * Indoor or outdoor IP65 accessory positions ⚡ Works well with * Fox ESS H1-G2 hybrid inverter systems * Fox ESS KH and KA hybrid inverter systems * Fox ESS EVO and PowerQ systems * Installer-designed backup load circuits Description Specifications Data Sheets Delivery The Fox ESS EPS-BOX-SP is a single-phase whole-home backup gateway with automatic on-grid and off-grid changeover, 100A maximum input current and an IP65 metal enclosure. It suits compatible Fox ESS residential storage installations where the customer wants selected whole-home backup behaviour during grid outages, subject to load and system sizing. Whole-home backup gateway for compatible single-phase Fox ESS storage systems Single-phase on-grid and off-grid changeover for grid outage operation Sits between the Fox ESS inverter, utility supply and household circuits No separate app connectivity is listed for the gateway 100A maximum input current with automatic backup switching IP65-rated metal enclosure for indoor or outdoor installation Listed by Fox ESS UK for H1-G2, AC1-G2, KH/KA Series, EVO and PowerQ systems How does whole-home backup switch over? Fox ESS UK describes the EPS-BOX-SP as automatically switching between on-grid and off-grid operation. During a grid outage, it isolates the property from the grid and restores power from the storage system after a short transfer delay. The page should explain that this is backup operation, not unlimited off-grid power. The available load depends on the inverter rating, battery state, PV generation, wiring design and the circuits connected to the backup arrangement. Which Fox systems is it for? Fox ESS UK lists the EPS-BOX-SP for the brand’s single-phase storage solutions, including H1-G2, AC1-G2, KH/KA Series, EVO and PowerQ. It should not be sold as a three-phase backup accessory. For LAMPS, this product should sit in the retained Fox ESS accessory set and link to the Fox ESS range. Do not point removed three-phase inverter pages to this accessory unless the buyer intent is genuinely backup-gateway related. What should installers size first? The backup loads should be confirmed before the product is ordered. Large inductive or high-startup loads may exceed the inverter or battery capability even though the gateway itself supports high input current. The installer must design isolation, neutral arrangement, earthing, protective devices and labelling according to the site and the latest Fox ESS instructions. The product page should avoid promising uninterrupted supply, because Fox ESS UK lists a typical transfer time of approximately 2 to 3 seconds. Is EPS-BOX-SP for single-phase systems only? Yes. Fox ESS UK presents the EPS-BOX-SP as a single-phase whole-home backup gateway for its single-phase storage solutions. It should not be listed as a three-phase backup box. Does it give instant backup power? No. Fox ESS UK lists a typical changeover of approximately 2 to 3 seconds. Sensitive equipment may still need its own UPS if it cannot tolerate a short transfer delay. What is the maximum input current? Fox ESS UK lists 100A maximum input current for the EPS-BOX-SP. The backup circuit still needs to be designed around the connected inverter, batteries and site loads. PDF EN EPS BOX SP Datasheet V1.0 20250815 Fox ESS EPS BOX SP Datasheet 443.9 KB No data sheets or downloads available for this product. Loading delivery information... Common installation accessories Solar panels Solar Batteries
