Solar Panel Maintenance and Cleaning

Maintenance icon

Electrical servicing

  • Maintain electrical safety
  • Extend system lifespan
  • Prices from £270

Cleaning icon

Panel cleaning

  • Only every 2 years
  • Boost output by up to 12%
  • Prices from £150

Why service your solar PV system?

All electrical systems should be inspected and tested periodically, and solar PV and battery storage systems are no different.

  • Maintain optimal system performance.
  • Achieve anticipated financial returns.
  • Avoid fire risks.
  • Ensure effective earthing.
  • Check for damage to cable and connectors.

As a minimum we recommend testing and inspection should be undertaken once every two years by a qualified electrician, trained in the relevant technology.

We offer a solar panel service for systems we have installed on a one-off basis, or as part of a more comprehensive package with on-going support. Our prices start from £270 inc. VAT for a single inverter, single phase system up to 10kWp.

why spirit installers

In addition to one-off servicing and / or cleaning, we offer the following packages with a 2-5 year term:

  Panel cleaning only Electrical service only Workmanship warranty extension only
Panel cleaning      
Panel cleaning every two years. Where possible we will clean the panels from the ground using a low-pressure washer and a long lance. In a small number of cases we may need to use a cherry picker.    
Inspection and testing      
Site inspection every two years    
Scope of inspection and testing visit      
Visual inspection from ground level of modules, mounting system, DC cable    
Inspection and testing of inverters    
AC electrical testing of solar PV circuit    
String voltage checks    
Inspection of protection devices    
Inspection of accessible connections    
Full written report    
Workmanship warranty extension      
Free telephone support working hours    
Guaranteed response times    
Extension of Spirit workmanship warranty. No call out fee or labour charges in respect of investigation of system fault caused by our workmanship, inverter or monitoring.    
Free liaison with manufacturer for spares under warranty. Labour costs for installation included.    
Assigned account manager
Cost (inc. VAT @ 20%)      
Per month (on direct debit) From £6 From £11 From £10 
Per year  From £75  From £135 From £120
Solar PV cleaning

Why clean your solar panels?

On a sloping array panels will be cleaned by the rain as the glass on the panels is self-cleaning. However, if your panels are in an area of high debris or pollution, or if they are installed on a flat roof, we recommend the panels should be manually cleaned every year or two.

Where possible we will clean the panels from the ground using deionised water, a low-pressure washer and a long lance. In some cases we will use the harness lines already in place on the roof. In other cases we will use a cherry picker.

A study by Google on their system in California suggested that it’s worth cleaning flat roof panels at least once a year at the end of winter; the yield on its flat roof system in particular increased by 36%.

We offer module cleaning for systems we installed; our prices start from £150 inc. VAT for a single inverter system up to 4kWp.

Areas we cover

Please note that we only service systems installed by us. For electrical servicing, we operate within a 30 mile radius of Reading, Berkshire, and for panel cleaning we cover a 20 mile radius of Reading:


For PV and battery installations, please see our service area map.

Call us on 0118 951 4490 to discuss your project, or send in your plans for a free quotation.

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