So I have switch that put excess power into heating the hot water & when that is done it feeds the grid.
This time of year we talk 1-2 kWhr per day only. Summer can see 25 kWhr.
My 3kW array is rated at 3064kWhr p.a. YTD 2016 we are at 3225. Best achieved was 3335 & the worst 3084.
Interesting numbers. I remember being told about a "black box" switch and whilst i thought it to be a good idea (£500?) i did not invest.
Our 4kw array generates 4150 to 4650kw per year (11.36 to 12.7kw per day ave). Best daily generation was 28kw.
Not trying to say mine is bigger than yours, just interested to compare.
Although a 4kw array we do have an inverter with mapping and it allows us to have 2 circuits. we have 13 x .25kw panels on the east facing roof and 9 x .25kw panels on the south facing roof. The inverter will limit the max generation to 4kw. I wish we could have 3 circuits so i could put some panels on the west facing roof.
