How much can I save with residential solar panels in the UK?

Most UK homeowners save between £300 - £2500 per year depending on roof size, orientation, shading, and energy usage.

Do solar panels increase home value?

Yes, installing solar panels can increase your property's value and appeal to environmentally conscious buyers.

Do I need planning permission for solar panels on my house?

In most cases, no. Residential solar panels are usually considered permitted development unless your home is listed or in a conservation area.

How long do solar panels last?

Modern solar panels typically last 25 to 30 years and often come with performance warranties.

What size solar system do I need for my home?

An average UK home typically installs a 3kW - 4kW system, but actual needs depend on your roof size, angle, and typical daily usage.

How can I get solar quotes from certified installers?

Visit Kilowatts.uk to receive competitive quotes from residential solar providers.

Residential

Home battery storage ROI calculator

Work out the payback on a home battery in the UK from the unit rates on your own bill.

Enter your day rate, off-peak rate and, if you have solar, what you are paid to export. The calculator then ranks home batteries you can buy in the Kilowatts shop and shows a 10-year return. A 5 percent yearly price rise is assumed. Results are a guide, not a quote.

Battery savings, one question at a time

Tell us about your energy supply and we'll take it from there. We'll only ask what we need.

Supply and usage

Is this a home or business supply?

Electricity region

Your electricity meter

Pricing profile for this tariff

Annual electricity imported from the grid (kWh), including EV charging at this meter

Is this measured or estimated?

Does annual use mean grid import or total site demand?

Site and equipment

Do you have solar panels?

Solar generation (kWh/year, if known)

Electricity exported (kWh/year, if known)

Do you have a battery?

Existing battery usable capacity (kWh)

Do you have an EV?

EV charging (kWh/year, if known)

Does annual electricity use already include EV charging?

Evening/overnight share of site use (%, if known or estimated)

Annual gas use (kWh/year, if known)

Current tariff and bill

Paste extracted bill details

Upload a PDF or photo of your bill, or paste details already extracted. Missing or unclear details stay as questions for you to answer.

Bill PDF or photo

Paste extracted bill JSON

How would you like to enter your current tariff?

Choose your supplier

Your current tariff

Matching tariff price

Supplier name if your tariff is not listed

Tariff name if your tariff is not listed

Current electricity standing charge (p/day)

Tax basis of the current electricity figures

Climate Change Levy basis (business)

Current annual electricity cost (£, if known)

Does current annual cost include export credit?

Current flat export rate (p/kWh, if known)

Keep this draft for my next sign-in (optional)

Optional MPAN / supply number from your electricity bill

Copy the boxes printed on your bill. The 13-digit core goes underneath the top line. Saved core digits stay masked.

Profile Class (2 digits) MTC (3 digits) LLFC (3 digits)

MPAN core (13 digits)

Period name

Fuel

Import or export

Unit rate (p/kWh)

From (HH:MM)

Until (HH:MM; 24:00 means midnight)

Use in this period (kWh/year, if known)

Rate tax basis

Weekdays, e.g. Mon Tue Wed Thu Fri Sat Sun

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