25 panels front and back, with 23 kWh of storage, in Hanslope

The garage had just become a workshop, so the batteries went on the driveway wall. A fast-track grid application kept the August date.

Solar panels covering the rear roof of a detached house in Hanslope

Quick facts

System size: 11.62 kWp
Panels: 25 × DMEGC DM465G12RT-G48HBB, 465 W
Mounting: On-roof, Fastensol FTH01 pantile rack
Inverter: Fox ESS KH10, 10 kW hybrid
Battery: 2 × Fox ESS EP12 — 23.04 kWh nominal, 20.74 kWh usable
Backup: Whole-home backup via the Fox Gateway EPS box and automatic changeover switch
EV charger: myenergi Zappi Glo, 7 kW
Other works: New IP-rated consumer unit, 63 A AC isolator
Roof: Concrete tiles at 45°, split front and back — 11 and 14 panels
Grid connection: G99 fast track, export limited to 7 kW
Installed: August 2026, over two days
MCS estimated generation: 8,249 kWh a year
Estimated savings: £1,243 a year
Estimated payback: 8 years

Estimated at quote stage based on the customer’s usage and tariff at the time. Actual savings vary.

Why they got in touch

A homeowner in Hanslope came through the solar calculator on the website and asked a direct question: “we were thinking panels front and back?” They were weighing up air conditioning as well.

What we recommended and why

Front and back was right. A new-build detached house at 45° pitch, with usable roof on both sides — so we quoted the max-fit option: 11 panels on the front and 14 at the back, 25 in all, 11.62 kWp.

An array that size needs a 10 kW inverter and real storage behind it, so two EP12 batteries went in at 23.04 kWh. We also added the Fox Gateway and an automatic changeover switch, giving the house whole-home backup in a power cut.

The install

Two practical problems. First, the garage had recently been converted into a workshop, so there was no room for the batteries in the obvious place — they went on the driveway wall instead, alongside the inverter and the Zappi.

Second, timing. A full G99 application on a system this size can mean a 45-working-day wait, which would have pushed the install well past August. We applied on the fast track with export limited to 7 kW against the 10 kW inverter. Limiting export is a fair trade when the alternative is waiting two months, and with 23 kWh of storage very little is being given up.

A new IP-rated consumer unit and a 63 A isolator went in at the same time. The install took two days, 20 and 21 August.

The result

11.62 kWp across both roofs, 23 kWh of storage on the driveway wall, whole-home backup and car charging. The MCS certificate puts estimated generation at 8,249 kWh a year.