On 30/04/2019 11:34, Tim Lamb wrote:
how much panel do you need for Hertfordshire sunshine May to October?
Hot weather conveniently requires more water which, last summer, was around 600litres/day at a head of around 5m.

My mathmatical capabilities do not stretch to this sort of problem:-)

There are quite a few programs around that predict average results, but you need to give them lots of information about your location, the azimuth and elevation of the panels, etc.


--
Clive Page