It's not as simple as that, you need to be below 4 kw other wise you need planning permission and it becomes commercial. 4kw also give you the max pay back tarrif. So it's 16 panels. You then need an inverter and all the installation certified and signed off by various boffins.
you also have to remember it only produces in day, so to benefit you need to use the electric in the day time as its not stored.
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MBModels - Schumacher Racing - Vapextech.co.uk - MRT - Savox - SMD
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