Practical UK solar guides

SEG is the route most UK households use to get paid for exported solar electricity. The rule is simple, but the paperwork and tariff choices matter.

Export tariffs can be simple or surprisingly fiddly. Batteries make the small print more important.

An MCS certificate records that a solar installation has been completed in line with MCS scheme requirements. It is useful installation evidence and the usual certification route for a household SEG application, but it is not planning permission, Building Regulations sign-off or DNO approval.

Most grid-connected home solar systems need a G98 notification or G99 approval. The route depends on grid-facing capacity, not simply panel count.

Installed solar panels and certain energy-saving materials are temporarily zero-rated for VAT, but the detail matters.

There isn't a universal solar grant for everyone, but VAT relief, SEG payments and targeted schemes can still change the numbers.

A solar cost estimate is only useful if it includes the whole installed job and separates solar-only cost from battery extras.

A fair price comparison looks beyond the headline quote. You need to compare system size, annual kWh, paperwork and aftercare.

Cost per kWh can be useful, but it is easy to misuse. The household value of solar depends on both bill savings and export income.

Most house roof installs are straightforward, but planning rules aren't identical across the UK and exceptions matter.

The cheapest quote isn't always the best. The best quote is the one where the system design, assumptions and paperwork all stack up.

Solar is low-maintenance, not no-maintenance. Warranties and monitoring are what keep small problems from becoming expensive.

A good solar installation process is mostly paperwork and planning before the panels ever arrive on the roof.

Solar is no longer just a panel-price question. In 2026, the real decision is about tariffs, export rules, storage, paperwork and a quote you can trust.

A good roof matters more than a glossy panel brochure. Shade and roof condition can change the economics quickly.

Self-consumption is often the quiet number that decides whether a solar estimate looks ordinary or excellent.

System size is only the starting point. Annual generation depends on the roof and location as much as the headline kWp.

EVs and heat pumps can improve the solar case, but only when the timing and controls make sense.

The calculator is only as useful as the numbers you put into it. This guide shows which assumptions deserve the most care.

A battery can be useful, but it's not automatically a faster payback. The answer depends on cost, routine and tariff.

The right battery calculation compares the extra annual benefit with the extra battery cost. Blended payback can hide the real answer.

Peak shaving sounds technical, but for a household it usually means using storage to avoid expensive grid electricity at busy times.

A battery is optional, not compulsory. Many UK homes should model solar-only first before adding the extra storage cost.

The best case for solar is practical, not hype-led: lower imports, useful export income, better tariff choices and a home that uses the electricity well.

Solar is a good fit for many homes, but not all of them. A weak roof, poor quote or unrealistic battery claim can turn a decent idea into a bad buy.