What is String Inverter?
A central inverter that handles all solar panels connected in series (a 'string').
Quick Answer
String inverters with power optimisers (e.g. SolarEdge) are the most popular choice in the UK. They offer a good balance of cost and performance. For typical UK roofs without significant shading, a string inverter is usually the best value option.
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String Inverter Explained
A string inverter is a centralised device that converts DC power from all solar panels wired together in one or more strings. It is the most common and cost-effective inverter type. The main limitation is that if one panel underperforms (due to shading or a fault), it can reduce the output of the entire string. Modern string inverters include power optimisers on each panel to mitigate this issue.
How Does String Inverter Work in the UK?
String inverters with power optimisers (e.g. SolarEdge) are the most popular choice in the UK. They offer a good balance of cost and performance. For typical UK roofs without significant shading, a string inverter is usually the best value option.
Frequently Asked Questions
Is a string inverter right for my home?
A string inverter works best when panels face the same direction with minimal shading. If your roof has multiple orientations or chimneys causing shade, consider microinverters instead.
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John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.