Trannergy Inverter Failed — Assessment & Replacement Options UK
Trannergy string inverters were installed across UK solar systems during the 2011–2015 period. The manufacturer is no longer operating and no spare parts, firmware, or warranty support exists. When a Trannergy inverter fails, replacement with a current-generation inverter is typically the only practical path forward.
Has your Trannergy inverter failed?
Completely dead, repeated fault trips, or significant output loss — we assess Trannergy failures and recommend the right replacement.
Book replacement assessment → See all servicesAbout Trannergy — why your inverter may no longer be repairable
Trannergy was a Chinese string inverter manufacturer that supplied single-phase and small three-phase units to UK installers. Models are typically 1–5kW. The brand ceased UK operations before 2016 and no UK distributors carry spare parts. Monitoring portals associated with Trannergy units are no longer accessible. Trannergy inverters remaining in service are aged 10+ years and are at end-of-life for their power electronics.
The lack of manufacturer support means there is no firmware update pathway, no access to technical documentation, and no spare components available. When core components like DC bus capacitors or IGBT modules fail — which is increasingly common for units installed in 2011–2015 — there is no economic or practical repair route. Replacement with a modern, supported inverter is the only viable path.
Why Trannergy inverters fail
Completely dead unit, no lights or display. The most common failure mode for end-of-life Trannergy units. Capacitor failure or power board fault. Non-repairable.
Inverter trips repeatedly and requires manual reset. Indicates failing protection circuits or capacitor degradation causing instability. Likely to worsen progressively.
Inverter appears to run but produces well below expected. Capacitor degradation or IGBT partial failure. Compare against calculated roof output to confirm.
What should I replace a failed Trannergy inverter with?
When a Trannergy inverter fails, you have the option of a like-for-like string inverter replacement, or an upgrade to a hybrid inverter with battery storage. The choice depends on your panel string configuration and whether you want to add battery storage in the future. STS assesses string compatibility and recommends the most suitable modern replacement.
Upgrade to a hybrid inverter with battery storage — most popular choice for Feed-in Tariff-era system upgrades.
View GivEnergy support →Cost-effective direct string replacement or step up to hybrid. Wide compatibility with older panel strings.
View Solis support →Value-for-money string or hybrid replacement. Strong UK installer network and monitoring support.
View Growatt support →Frequently asked questions
No. Trannergy is no longer operating and no spare components are available in the UK. The inverter's internal power electronics — DC bus capacitors, IGBT modules, control boards — cannot be sourced for replacement. If a Trannergy inverter has failed completely, replacement with a modern inverter is the only option. A fault assessment confirms the cause before you commit to a replacement.
Any modern string or hybrid inverter with compatible input specifications can be used as a replacement. The existing solar panels connect to the new inverter using the same DC cabling — only the inverter is swapped. Common UK replacements include Growatt, Solis, and GivEnergy hybrid inverters. The best choice depends on panel string configuration and whether you want to add battery storage.
No. Trannergy has not operated in the UK for many years and all warranty periods have lapsed. There is no manufacturer to contact. If the original installation was MCS-certified, the workmanship guarantee from the installer may theoretically apply to the installation itself — but is unlikely to cover an inverter from a manufacturer that no longer exists.
Yes. STS can replace legacy Trannergy inverters with modern string or hybrid inverters, keeping your existing panels and DC cabling. We provide a complete assessment, string configuration check, and installation of a suitable replacement model. Replacement typically costs from £795 depending on your system size and chosen inverter type. You can opt for a like-for-like string replacement or upgrade to a hybrid inverter with battery storage.
Get a Trannergy replacement assessment
Tell us what happened to your inverter — we'll assess the fault and recommend the most suitable modern replacement for your system.
STS supports all major active inverter brands for replacement assessment. We help you choose the right replacement without being tied to any manufacturer.
Browse all active brands →