Looking after a 2010 to 2015 solar system
Systems fitted in the Feed-in Tariff years are now 10 to 16 years old. What goes wrong, what to check, and what to protect.
6 Sept 2026
ReadBeginner
Solar Wiki
Tariffs & FiT / SEG
Feed-in Tariff legacy, SEG rates, Octopus Flux, Agile, and more.
10 articles in this section.
Articles in Tariffs & FiT / SEG
Tariffs & FiT / SEG Tariffs & FiT / SEG SEG export payments alongside your FIT
You can keep FIT generation payments and move export to the Smart Export Guarantee. Here is how the two schemes fit together.
6 Sept 2026ReadIntermediateTariffs & FiT / SEG FIT generation meters: readings, faults, replacement
Your Feed-in Tariff payments come from one meter. How to read it, what happens when it fails, and what to do if it is replaced.
6 Sept 2026ReadBeginnerTariffs & FiT / SEG Replacing the inverter on a FIT system
An inverter swap does not end your Feed-in Tariff, but the size of the new unit and the paperwork both matter. Here is what to check.
6 Sept 2026ReadIntermediateTariffs & FiT / SEG Adding a battery to a FIT system
A battery can sit alongside a Feed-in Tariff system. What matters is that your generation meter still reads only your solar.
6 Sept 2026ReadIntermediateTariffs & FiT / SEG Adding panels to a FIT system: what you keep
Extra panels on a Feed-in Tariff system earn nothing under FIT. Here is what you keep, what you lose, and what to tell your licensee.
6 Sept 2026ReadIntermediateTariffs & FiT / SEG Replacing solar panels on a FIT system
What happens to your Feed-in Tariff payments when old panels come off and new ones go on, and who you have to tell.
6 Sept 2026ReadIntermediateTariffs & FiT / SEG Upgrading Your FiT Solar System Without Losing Your Tariff
You can upgrade a feed-in tariff solar system without losing your tariff — what changes is what you get paid for. Your originally accredited capacity keeps its rate, added capacity is not paid under FiT, and export can move to the Smart Export Guarantee.
5 Sept 2026ReadIntermediateTariffs & FiT / SEG Inheriting a Feed-in Tariff When You Buy a House with Solar Panels
If you're buying a home with existing solar panels, there may be a valuable Feed-in Tariff (FiT) agreement attached to the system. Here's how to transfer it into your name, what documents you need, and what can go wrong.
20 Jun 2026ReadIntermediateTariffs & FiT / SEG SEG Tariff Application Process
Essential documentation, supplier selection, and common delays when applying for Smart Export Guarantee payments for your solar panels.
11 Jan 2026ReadBeginner
Other sections of the wiki
- Getting StartedNew to solar? Start here for the basics.
- Solar PanelsPanel types, sizing, efficiency, and what actually matters.
- InvertersString vs micro, hybrid options, and common failure points.
- BatteriesHome battery storage, chemistries, sizing, and real-world payback.
- UK Rules & DNOsG98/G99, export limits, planning permission, and DNO applications.
- Smart Meters & ExportSMETS1 vs SMETS2, export MPAN, and how payments actually work.
- TroubleshootingCommon problems, fault codes, and when to call an installer.
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