Specialist Installer of Solar Photovoltaic and Battery Storage Systems in Oxford and Surrounding Counties

Call us on: 07717 004240

or email enquiries@simssolar.co.uk


No one wants faults to develop in their system, and as an organisation we carefully select the products we install for performance, reliability and manufacturer support.

The inverters we use in our installations are sourced from Fronius and SolarEdge, and all come with a five+ year warranty as standard. These can be extended to 20 years in aggregate at additional cost.

As a Fronius Service Partner and SolarEdge Advanced Installer we are authorised to service and maintain your inverter which means minimum down-time in the event of a fault and maximum earnings for you. This support we extend not only to our own customers but to customers who's original installer in no longer trading.

The panels we use come from globally respected manufacturers such as Sunpower, REC and LG. These are companies that have a proven track record, are financially strong and operate a manufacturing process in which all stages of the manufacturing process are in their control. What this means to you is a product that is unlikely to fail and if it does, the backup is in place to ensure you have minimum down-time.

We are proud to be Premier Partner installers of SunPower modules, manufacturers of the most efficient modules on the market. The warranty offered on SunPower products is world leading with a 25 year workmanship warranty and a 25 year performance guarantee which guarantees panel output at 87% after 25 years.

We are proud to be certified installers of Tesla Powerwall. The warranty offered by Tesla is a 10 year product warranty.

In the unlikely event that a fault occurs with your system, all our installations come with a standard no quibble two year, insurance backed warranty, covering all parts, materials and labour.

The warranty is underwritten by Quality Assured National Warranties


“Just wanted to say thank you for such a smooth and professional installation. Throughout the process I found you knowledgeable and trustworthy.”

Mr and Mrs W