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Defunct brand · Trannergy inverter replacement

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.
Free fault assessment · no fix, no fee · replacement from £795 if the unit has failed
Has your Trannergy inverter failed?

Completely dead, repeated fault trips, or significant output loss — we assess Trannergy failures and recommend the right replacement.

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I’ve used Ron a couple of times regarding issues with my Givenergy inverter and batteries after Givenergy went bust. My system stopped working properly so it was a stressful time but Ron resolved the issues and got my system working properly again. He’s really helpful and knowledgeable and I wouldn’t hesitate to recommend him and to use him again if the need arose.

Michael Fairhurst · Jun 2026 Google

Ron is incredibly knowledgeable about solar installs in general but knows givenergy products inside out and the key personnel that worked there from the start to the end. My problem was spurious in its nature but Ron spotted it straight away when he understood the installation details. In essence the installers didn’t fit the correct trip switch. He also gave me hope that in the future hardware repairs could be possible but it’s still early days. This guy really is in the know and keen to sucas a business If you need help don’t hesitate

Geoffrey Heathcote · Jun 2026 Google

A superb service from Ron who went beyond the normal service received from other Tech support companies. I live abroad and was badly let down when my givenergy system failed (and the company went bankrupt) and the local supplier ran away from the problem. Ron sorted the problem and even accessed specialist coding for the inverter that would not be available for suppliers. Ron also ran a full diagnostic to insure that all was in good working order afterwards. Without Rons support and patient assistance I doubt I would ever have got the system back up and running. Well done and thankyou and you have a customer for the future.

Philip Davey · Jun 2026 Google

I reached on behalf of a friend, who had lost control of their battery following a storm. A couple giv energy “dealers” had attempted and said different fixes. None worked. Solar tech support solved it remotely on the first attempt almost instantly. Genuinely a 10/10 service.

Will Jay · Jun 2026 Google

Ron responded very promptly regarding my GivEnergy battery issue, his knowledgeable diagnosis was spot on and resolved the issue on first attempt. Would recommend to any and all.

Simon Hill · May 2026

I've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues

michael fairhurst · May 2026

About 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.

Common Failures

Why Trannergy inverters fail

Total inverter failure

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.

Repeated fault trips

Inverter trips repeatedly and requires manual reset. Indicates failing protection circuits or capacitor degradation causing instability. Likely to worsen progressively.

Low or no generation

Inverter appears to run but produces well below expected. Capacitor degradation or IGBT partial failure. Compare against calculated roof output to confirm.

Replacement Options

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.

Replacement options

STS supports all major active inverter brands for replacement assessment. We help you choose the right replacement without being tied to any manufacturer.

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FAQ

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.

  • Independent — not affiliated with Trannergy
  • No fix, no fee
  • On-site visits available across Yorkshire

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