The disadvantages of PVs is their high price per watt - typically £6 or more - and for much of the year, you would be unlikely to see more than 5 hours operation per day. We have sourced some individual cells which reduces the price per watt to under £1.
These cells are 'seconds' from one of the largest manufacturers in the USA. They have been rejected for many reasons - wrong colour shade, chipped or cracked corners, poor soldered connections etc. Most of these panels will exceed the manufacturer's performance data (given below):
