Can I Switch Energy Supplier With Solar Panels? UK Guide

Yes, you can switch energy supplier with solar panels — it doesn't lock you in. The part that trips people up isn't the switch itself, it's what happens to your export income. If you're on the old Feed-in Tariff (FiT), your generation payments carry on from your original FiT licensee regardless of who supplies your electricity. If you're on the Smart Export Guarantee (SEG), your export tariff and your electricity import tariff are legally separate arrangements — but some SEG deals are only available if you also buy your electricity from the same supplier, so switching can mean re-applying for export, not just import.

Import and export are two different contracts

It helps to think of a solar home as having two energy relationships, not one: an import contract (the electricity you buy, same as any household) and an export arrangement (FiT or SEG payments for what your panels send back to the grid). Switching your import supplier — for a cheaper standing charge, a better app, or to move off a poor-value default tariff — works exactly the same way as it would without panels: compare deals, apply with the new supplier, and the switch itself completes on a fixed timeline. It's the export side that needs separate attention.

If you're on the Feed-in Tariff (FiT)

FiT closed to new applicants in April 2019, but roughly 900,000 UK households still receive FiT generation and export payments on 20-year index-linked contracts. If that's you: your FiT payments are unaffected by switching your electricity supplier. FiT payments come from your original FiT licensee — the supplier you signed up with, or whoever they've since sold the FiT book to — and that arrangement is separate from whoever bills you for imported electricity today. You don't need to tell your FiT licensee you're switching import supplier, and there's no risk of losing accrued payments by shopping around for cheaper electricity.

If you're on the Smart Export Guarantee (SEG)

SEG works differently. Under Ofgem's SEG rules, suppliers with 150,000 or more domestic customers must offer at least one SEG export tariff, but Ofgem doesn't set the rate, contract length or eligibility criteria — that's down to each supplier. In practice, SEG tariffs fall into two broad types:

• Linked (or bundled) tariffs — only available if you also buy your electricity from that supplier. These usually pay the highest rates, sometimes into the teens of pence per kWh, because the supplier is using the export rate to win your import business too.
• Standalone tariffs — open to anyone with an eligible solar installation, regardless of who supplies your electricity. Rates are typically lower than the best linked deals.

If you're on a linked SEG tariff and switch your import supplier away from that company, you'll usually lose eligibility for that specific export rate and need to re-apply for SEG with either your new supplier (if they offer a linked deal) or a standalone provider. This is the one genuine gotcha: switching for a cheaper import tariff can mean a worse export rate, so it's worth checking both sides of the deal before you switch, not just the unit price.

Import and export don't have to be with the same supplier

You are not required to buy your electricity and sell your export to the same company. It's entirely legitimate to import from whoever has the cheapest standing charge and unit rate, while registering a standalone SEG tariff with a different supplier purely for the export income — as long as that supplier accepts standalone applications. This is worth knowing if a linked tariff's import rate isn't actually competitive: the bundled export rate might not be worth a worse electricity deal once you compare the two properly.

Applying for SEG with a new supplier

If you do need to set up (or move) a SEG export arrangement, the process typically involves:

1. Choosing a tariff and completing the new supplier's SEG application form.
2. Providing your MCS (Microgeneration Certification Scheme) installation certificate, or Flexi-Orb/equivalent accreditation, as proof your system is eligible.
3. Supplying an export meter reading — most modern smart meters can provide this automatically; older setups may need a dedicated export meter point (MPAN) requested from your Distribution Network Operator, which can take one to four weeks.

End to end, signing up for a first SEG tariff typically takes five to twelve weeks before payments start, so if you're switching away from a linked deal, apply for the replacement before (or as soon as) you switch your import supplier — don't leave a long gap where you're exporting for nothing. See our Smart Export Guarantee rates guide for how to compare current offers.

How long the switch itself takes

The import switch — moving your electricity account from one supplier to another — is governed by Ofgem's Energy Switch Guarantee: once you've confirmed you want to go ahead, participating suppliers (including all the major names) must complete the switch within five working days, or the new supplier owes you compensation. This timeline applies whether or not you have solar panels; having an export arrangement running alongside doesn't slow down the import switch itself.

Practical checklist before you switch

• Check your current SEG tariff type. If it's linked to your existing supplier, factor the export rate into your comparison, not just the import unit price.
• Line up a replacement export deal first if you're leaving a linked tariff, so you're not exporting unpaid while a new SEG application processes.
• Keep your MCS certificate handy. You'll need it (or Flexi-Orb equivalent) for any new SEG application.
• FiT recipients can switch freely — there's nothing to arrange on the export side.
• Compare the whole package — a slightly higher unit rate with a strong standalone or linked SEG rate can beat a cheap import tariff paired with a poor export rate.

None of this makes switching harder in practice — it just means solar owners have one extra box to check (their export tariff) that non-solar households don't. Once you know whether you're on FiT or SEG, and whether your SEG deal is linked or standalone, the decision is the same as any other switch: compare the numbers and go with whichever combination pays you the most, overall.