How long does a solar inverter last and what does a replacement cost?
Short answer
Expect to replace a string or hybrid inverter once during the life of the panels, typically after 10 to 15 years. The Energy Saving Trust puts a typical replacement at around 800 pounds, though hybrid inverters and battery systems cost more. Check whether an extended inverter warranty costs nearly as much as a replacement.
Last checked 24 September 2026 · 2 sources
In more detail
- EST main page: panels 25+ years; replace the inverter after around 12 years; minimum 5-year warranties, extendable to 15.
- EST cleaning blog: inverters typically need replacing every 10-15 years; usually around GBP 800.
- Hybrid inverters are often tied to a battery brand/firmware: a like-for-like replacement may be needed to keep the battery working and warranted.
- Microinverters and optimisers sit on the roof: individual failures are cheaper but need access (scaffold or roof ladder).
- Replacement inverter must be G98/G99 type-tested; a change in AC rating may need DNO notification; keep SEG/FiT supplier informed if the generation meter changes.
The facts, dated
- 01Inverter replacement typically needed every 10-15 years, usually around GBP 800 (EST) — 800 GBP
market_data · UK · checked 24 September 2026 · Energy Saving Trust
- 02EST: replace solar inverter after around 12 years — 12 years
installer_view · UK · checked 24 September 2026 · Energy Saving Trust
What we saw in the field
[QA review 2026-09-24] I-6: EST confirmed ~£800, replace every 10-15 years (checked 2026-09-24). | Earlier notes: Supports installer claim that panels last ~30 years only if the owner budgets for 1-2 inverter replacements.
Sources
- Energy Saving Trust — energysavingtrust.org.uk/solar-panel-cleaning-maintenance/
- Energy Saving Trust — energysavingtrust.org.uk/advice/solar-panels/
Last checked: 24 September 2026