Solar, Battery Storage and Home Backup in Horsham

Lunar Solar Limited installed a 17.39 kWp solar system with 60 kWh of battery storage at a detached home in Horsham, helping the homeowner reduce electricity bills and providing backup power during mains outages.

Executive Financial & Energy Performance

Real-world performance and savings from this solar & battery installation.

Property

Detached home with slate and flat roof sections

Solar panels

37 × 470 W AIKO panels

Solar capacity

17.39 kWp

Battery storage

60 kWh across five Sigenergy battery modules

Hybrid inverters

10 kW and 6 kW Sigenergy units

Backup

Whole-house gateway

Forecast annual generation

14,570 kWh

Installation duration

Approximately three days

Video Showcase & Installation Story

See the full installation process and how we delivered long-term energy independence.

The Challenge

The homeowner faced electricity bills of approximately £400–£500 per month. Electric underfloor heating, EV charging, cooking and everyday household consumption all contributed to the property’s energy demand. The aim was to reduce reliance on grid electricity while adding battery storage and backup power. The roof presented an additional design challenge: solar panels needed to be installed across both slate-tiled sections and a flat roof at the crown of the building.

The Solution

Lunar Solar Limited designed a system comprising 37 AIKO solar panels, two Sigenergy hybrid inverters and 60 kWh of battery storage. The battery system consists of two stacks, with three battery modules on one and two on the other. It stores solar electricity for use when generation falls, helping the household use more of the energy produced on its roof. A whole-house gateway provides backup power during a mains outage, subject to available battery charge and system output limits. Additional earth rods were installed in the front garden beside the driveway, and the installation was tested.

A Mounting System Suited To Each Roof

The slate-tiled sections required careful installation of roof hooks and mounting rails. For the flat roof, Lunar Solar Limited used a ballasted mounting system, securing the array with weights without penetrating the roof covering. Wind-uplift calculations were completed as part of the design. Bird protection was fitted around both arrays, including the flat-roof panels at the homeowner’s request.

Installation And Commissioning

Lunar Solar Limited managed the project from design and DNO applications through installation, testing and certification. Scaffolding provided access around the property and to the roof sections. The installation was initially expected to take two days, but wet weather made the roof slippery and required work to pause. The project took approximately three days to complete.

The Results

The system is forecast to generate approximately 14,570 kWh of solar electricity per year. The homeowner reports that electricity bills have fallen from approximately £400–£500 per month to around £100–£150 per month during winter, with £0 electricity bills reported during summer. Solar generation and battery storage now meet much of the household’s electricity demand, reducing the amount purchased from the grid. The project’s estimated payback period is approximately five years. Annual generation and payback are estimates. Billing outcomes are homeowner-reported and vary with seasonal generation, household consumption and electricity tariffs.

Lunar Solar installed a complete solar system at my property, including battery storage and a gateway backup system. The installation was incredibly fast, professional and reliable. They handled everything from start to finish, making the whole experience completely stress-free. Everything works perfectly, and I couldn’t recommend them highly enough!

Ready to Take Control of Your Home Energy?

Book your free 30-minute roof survey today. No pushy sales calls-just clear advice, precise modeling and honest pricing.