hc1 0203 189 0665.      hc2 sales@myriadproducts.co.uk.    mhub-icon-png Customer Portal

Resource

|

Commercial Solar Inverter Repair, Replacement & Servicing

Commercial Solar Inverter Repair, Replacement & Servicing

PV| Commercial| Service and maintenance

Myriad Heat & Power Products (“Myriad”) specialise in commercial Solar PV and offer a full range of solutions for roof-top and ground-mounted PV projects.

Myriad have been leading the way in renewable energy projects for 20 years and we have a proven track record for delivering renewable energy projects that reduce energy bills and cut carbon emissions.

When a solar inverter fails, your system stops earning. Inverters are the number one point of failure on commercial solar PV systems, and every day one stands idle is generation, savings and revenue lost. Myriad diagnoses, repairs and replaces solar inverters on commercial and industrial systems across the UK, whether we installed the system or not. Call our service desk on 0203 189 0666 for a rapid response. Planning a new installation instead? Read our commercial solar photovoltaic guide.

PV Inverter Health Check Inspection

Myriad provide professional inverter inspection, diagnostics and repair to identify and resolve faults before they cost you generation.

inverter

Planned professional maintenance is important for:

  1. Mechanical and electricity safety and security
  2. Performance and longevity
  3. Ensuring the system meets its owner’s expectations

Typical Included Scope:

  • Visual inspection of all accessible DC cables.
  • Measurement & recording of VOC, ISC & RISO of all DC strings.
  • Internal inspection of all accessible DC isolators for terminal security and general condition.
  • Inspection & recording of inverters data including total generation and error messages (if contributes to condition of PV system).
  • Functional test of all AC isolators (where accessible & in original PV scope).
  • Inspection of meter(s) connected to PV system (where accessible & in original PV scope).
  • Functional test of breaker(s) connected to system (where accessible & in original PV scope).
  • Report of findings including any recommended remedials or improvements.
  • Provision of RAMS from our standard template (bespoke RAMS charged at POA).

 

REQUEST A QUOTE

Signs Your Solar Inverter Needs Attention

Myriad engineers checking a roof-mounted commercial solar PV system

Book a diagnostic visit if you notice any of the following:

  • Generation noticeably below the same period last year.
  • Error or fault codes, or red or flashing status lights, on the inverter display.
  • The inverter repeatedly switching off or restarting.
  • Tripped breakers, or no export showing at all.
  • Monitoring alerts or communication drop-outs - on larger arrays, a single failed string inverter can quietly cost thousands of pounds a year.
REQUEST A QUOTE

Our Commercial Solar Inverter Services

Repair, replacement and everything in between - delivered by our own accredited engineers across the UK.

Row of commercial solar PV inverters maintained by Myriad

What we do:

  • Fault diagnostics - on-site and remote diagnosis of faults, error codes and underperformance.
  • Inverter repair - component-level repair where economical.
  • Firmware updates and configuration - resolving nuisance trips and grid-settings issues.
  • Inverter replacement - like-for-like swaps or upgrades where repair is no longer economic.
  • Reactive call-outs - national engineer network, with parts identified before we attend wherever possible.
  • Remote technical support - service desk telephone support in and out of office hours.
REQUEST A QUOTE

Repair or Replace? We Give You a Straight Answer

An honest recommendation backed by clear costs - never a push towards the more expensive fix.

Wall-mounted commercial solar PV inverter with isolators

A repair is usually the right call for younger inverters with isolated component failures. Replacement makes more sense when the unit is out of warranty, parts are hard to source, or repeated faults point to end of life.

Most inverters last 10-15 years, so on older systems a modern, more efficient replacement often pays for itself. We quote both options where both are viable, with costs set out clearly. We work on all major brands, including SMA, Fronius, SolarEdge, Solis, Huawei, GoodWe, Growatt and Sungrow.

 

To quote quickly, it helps to have:

  • Inverter make and model
  • The fault code or symptoms - a photo of the display helps
  • System size (kWp) and number of inverters
  • Site postcode and access notes
REQUEST A QUOTE

Frequently Asked Questions

Can a solar inverter be repaired?

Often, yes. Many inverter faults are component-level failures - capacitors, fans, fuses, DC isolators or communication boards - that a qualified engineer can repair. Whether repair is economic depends on the inverter's age, warranty status and parts availability, which is exactly what our diagnostic visit establishes.

Is it worth repairing an inverter, or should I replace it?

If the inverter is relatively young and the fault is isolated, repair is usually cheaper and quicker. If it is out of warranty, approaching 10-15 years old, or has a history of faults, replacement is normally the better investment. Myriad quotes both options with clear costs so you can decide.

What are the most common solar inverter faults?

The most common issues on commercial systems are overheating (often failed fans or blocked ventilation), aged capacitors, DC isolator faults, grid-settings and firmware issues causing nuisance trips, and communication failures that stop monitoring without stopping generation.

How long does a solar inverter last?

Typically 10-15 years, compared with 25+ years for the panels themselves. Most commercial solar PV systems will need at least one inverter replacement during their life, which is why Myriad recommends budgeting for it within your O&M plan.

How much does commercial solar inverter replacement cost?

It depends on the inverter's size and type, access, and whether switchgear or cabling needs updating at the same time. Myriad provides a fixed quotation after a remote or on-site assessment, and where repair is viable we price that as an alternative.

Do you repair inverters on systems Myriad didn't install?

Yes. Myriad provides independent inverter repair, replacement and full solar PV maintenance for systems installed by other contractors across the UK.

Get in Touch
Or call