Commercial Solar PV Operations & Maintenance - Keep Your System Performing Over Its Lifetime.

A commercial solar PV system generates returns for 25–30 years, but only if it keeps performing. Inverter faults, soiling, shading changes, connection degradation and monitoring gaps can all reduce yield without triggering obvious alerts. The difference between a system that performs to its modelled output and one that quietly underperforms by 10–15% is often the quality of the O&M contract behind it.
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  • Barrow Electrical provides planned and reactive O&M contracts for commercial solar PV systems across the UK — whether we installed the system or not. NICEIC-certified electrical works on every visit.

We maintain systems we didn’t install

If your solar system was installed by another contractor, we can still provide O&M cover. We carry out a commissioning audit at the start of any new O&M contract to establish the system’s current condition and identify any pre-existing issues before taking on maintenance responsibility.

What Our O&M Service Covers

Annual inspection and performance review

Full site inspection covering panel condition, mounting system integrity, DC cabling and connections, inverter operation, AC protection devices and metering. Performance data reviewed against modelled yield. Written report issued with any recommendations.

Inverter monitoring and remote fault response

Remote monitoring of inverter performance with automated alerts for faults, communication failures and output anomalies. First-line remote diagnosis before any site visit is required. Most inverter faults can be diagnosed and often resolved remotely.

Reactive fault response

Site attendance for faults that cannot be resolved remotely. NICEIC-certified electrical diagnosis and repair. Target response times agreed at contract stage.

DC and AC electrical testing

Periodic testing of DC string voltages, insulation resistance and AC protection settings. Thermal imaging of DC connection boxes and inverter terminals to identify developing faults before they cause failure.

Panel cleaning (optional add-on)

Scheduled panel cleaning to maintain yield in environments with high soiling rates — industrial areas, agricultural settings, heavily trafficked locations.

Smart Export Guarantee administration support

Assistance with SEG tariff administration, metering records and annual reporting requirements for clients exporting surplus generation to the grid.

What clients ask before committing to battery storage

We recommend an annual inspection as a minimum for any commercial system. Higher-output systems or those in demanding environments may benefit from a six-monthly schedule. Our O&M contracts are tailored to your system size and operating environment.

Inverter faults are the most common cause of system underperformance. Under our O&M contract, we monitor inverter performance remotely and will alert you to any fault as soon as it is detected. Most faults can be diagnosed remotely; where a site visit is required, we attend within the response time agreed in your contract.

Yes. We carry out a commissioning audit at the start of the contract to establish the system’s current condition. If we identify any pre-existing issues, we will report them before taking on maintenance responsibility.

Find out what solar could do for your site

We start every conversation with a free desktop review — your energy bills and site details in, a realistic yield and payback estimate out. No site visit required at this stage. No obligation to proceed. If the numbers work, we’ll tell you exactly why. If they don’t, we’ll tell you that too.

Book a scoping call