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Solar PV and battery storage, designed around how you use energy
MCS-certified installations for homes and commercial roofs across Essex, Kent and London. We model your output from your own bills, install in one to two days and handle the DNO and export paperwork.
A quote based on your kWh, not a brochure
Every solar quote starts with your consumption. We look at your bills or smart meter data, measure the roof, check shading and orientation, and model the array in software so you can see the generation month by month before you commit.
The system is designed to cover as much of your own use as possible, with a battery sized so you are not exporting cheaply in the day and importing dearly at night. If solar is not going to pay back for your property, we will say so.
What is included
- Solar PV arraysIn-roof or on-roof panels for pitched roofs, ballasted frames for flat roofs and ground mounts for larger plots.
- Battery storageHybrid and AC-coupled batteries from 5 to 30 kWh, with backup options for power cuts.
- Hybrid invertersSized to the array and battery, with monitoring through an app on your phone.
- MCS certificationEvery system is commissioned to MCS standards so you qualify for the Smart Export Guarantee.
- DNO and export setupG98 or G99 applications, export MPAN and Smart Export Guarantee registration handled for you.
- Commercial roof arraysSized to daytime load for warehouses, offices, schools and farms, with structural checks.
From survey to switch-on
Survey and design
We measure the roof, check shading and your consumption data, then model the array so the quote is based on your kWh.
Fixed quote and paperwork
Itemised price, generation estimate and payback model. We submit the DNO application and check planning conditions.
Install and commission
Scaffold, panels, inverter and battery over one to two days. Commissioned, tested and shown to you before we leave.
Certificates and export
MCS certificate, Electrical Installation Certificate and Smart Export Guarantee registration within a few weeks.
Questions about solar and batteries
Cost, savings, planning and timing.
How much does solar panel installation cost in the UK?
A typical 4 kWp solar PV system for a UK home costs between £5,500 and £8,000 installed, with a 5 to 10 kWh battery adding roughly £3,000 to £5,000. Solar and battery installations are zero-rated for VAT until 2027. Nexa Power surveys the roof, models the output and quotes a fixed price before any work starts.
How much will solar panels save me?
A 4 kWp array in the South East generates around 3,600 to 4,000 kWh a year. With a battery, a typical household uses 70 to 80 percent of that itself and exports the rest under the Smart Export Guarantee, which works out at roughly £900 to £1,200 a year at current prices. We model your figures from your own bills.
Do I need planning permission for solar panels?
Most roof-mounted domestic systems are permitted development and need no planning application, provided panels do not project more than 200 mm from the roof and the property is not listed. Conservation areas and flat roofs have extra conditions. We check this during the survey and handle any application if one is needed.
How long does a solar PV installation take?
Most domestic solar installations are completed in one to two days on site. Scaffolding goes up the day before, panels, inverter and battery are fitted and commissioned, and the DNO notification and MCS certificate follow within a few weeks. Commercial roof arrays are usually scheduled over one to two weeks.
Can I add a battery to solar panels I already have?
Yes. An AC-coupled battery can be retrofitted to almost any existing system without changing the panels or inverter. It stores the electricity you currently export during the day so you can use it in the evening, which is where most of the saving comes from.
Find out what your roof could generate
Send a recent bill and your postcode and we will send an indicative design and price.
