Solar panels in Liverpool: output, VAT and local rules

What the sun gives you in Liverpool

PVGIS, the European Commission’s solar tool, models about 965 kWh a year for each kWp on a south-facing roof at 35 degrees. That is higher than the modelled figure for Manchester, at 896. See the PVGIS run for Liverpool for the inputs.

The best tilt is about 40 degrees, which models at 968 kWh per kWp. Tilt therefore makes little difference here. Direction and shade matter much more.

Here is a worked example. Specifically, a 4.5 kWp system would make about 4.5 x 965, or roughly 4,343 kWh a year. That is a modelled estimate. Real output will move with the weather, so do not treat the number as a promise.

Several things can lower it. For example, east or west roofs make less than south ones. Trees, chimneys and tall neighbours add shade, and dirt or ageing add small losses over time. PVGIS already allows a 14% system loss for many of these.

Terraced streets and shared roofs

Many Liverpool homes sit in terraces, which can mean small or shared roofs. Our post on solar panels for terraced houses and flats explains roof space, leasehold consent and shared structures. Read it before you ask for quotes.

However, if you rent, you will need your landlord’s agreement. If you own a flat, the freeholder will usually need to agree too. Get that in writing early.

The VAT window

Timing matters on tax. HMRC says installing solar panels and battery storage is zero-rated for VAT until 31 March 2027. From 1 April 2027 the rate reverts to 5%, under current legislation.

Our post on VAT on solar panels explains what qualifies. Ask installers how the VAT rate is set for your job, since it can depend on when the work is done. A delay could add cost.

Help may exist for some households too. England’s Warm Homes: Local Grant lists solar PV as an eligible measure. It is aimed at low-income, privately owned homes with an EPC rating of D to G, and councils deliver it. Check whether your council is running it.

Selling spare power

Exported power can earn money under the Smart Export Guarantee. Ofgem says tariff rates must always be above zero. Suppliers choose the rate, however, so offers differ. Compare them before you sign up.

Connecting to the grid

SP Energy Networks runs the SP Manweb area, which covers Merseyside and North Wales. Any new generator must be notified to it. The route depends on size.

A system up to 16 A per phase follows G98, while larger ones follow G99. The MCS standard counts every generator together, so solar and a battery add up. Because of this, a battery can change the route.

The MCS standard puts the notification on the installer. However, ask them to confirm when it was sent. Keep the reply with your paperwork.

Planning with Liverpool City Council

Liverpool City Council is the planning authority. Many houses can add panels without a full application. However, England’s permitted development rules for solar changed on 27 August 2026.

The Planning Portal’s guide to the changes says houses and blocks of flats now follow separate rules. Older rules can still be used by eligible projects until 26 August 2027. The exact limits are best confirmed for your address.

However, conservation areas and listed buildings carry extra limits, and flats follow their own route. Ask the council before you pay a deposit. It is a quick email that can save a costly mistake.

Choosing an installer

Search for any firm on the MCS installer finder. MCS certification is also required to claim payments for exported power, as GOV.UK explains. Without it you cannot get paid for the spare power you send out.

Look at consumer protection as well. RECC members must insure deposits, stage payments and workmanship warranties. Therefore, a firm that fails should not take your deposit down with it.

Collect three written quotes, because prices and scope vary, and compare them line by line. Our page on solar panel installation lists what a full job covers. DESNZ data is in our solar panel costs guide.

Manchester is the nearest big city, and it has a different network operator. Our page on solar installers serving Manchester shows how output and rules compare.

When you are ready, you can ask for quotes from vetted MCS installers. Nobody contacts you until you send the form.