Roger
Guest
Hi I have a similar issue, my 3.75Kw system installed last year often reads 3.72Kw on the geo when the sun is on it, however, today 30/6 (btw hottest day of the year so far 30C)in full sun, directly onto the panels, roof pitch 45degrees, is disappointingly only showing 2.88Kw, is it the heat increasing resistance?