How much would a investment like this cost from zero? and is it worth to setup?
If you live in example south spain where its alot of sun the most of the time... Just curious, if somebody have the time and want to explain for a rookie
Okay off the gird ie using batteries for the dark cost a ton more.
Grid tied can save a lot of money if the place you are in allows metered swapping.
my big array does 1 megawatt a day
we burn 110kwatts an hour or 2.64 megawatts so 2.64-1 = 1.64 megawatts out of our pockets.
but if your array did same 1 megawatt during sunlight
and you burn 40kwatts an hour for all 24 hours the grid banks the 1 megawatt for night time.
so 40 x 24 = 960 kwatts. so 1000-960 means you are owed 40kwatts of power for that day.
but you need a place that does fair net meter.
Some places would not net meter the 1 megawatt you generate. so 45 x 7 = 315 kwatts is all they would give you. even though you created 1000 kwatts or 1 megawatt.
Now with batteries it means you need 960 x 2 = 1920 kwatts charged into the batteries since you can only run down a battery about 50%.
Now a small system scales different but if you do on grid and do net meter your savings are more than 35% over no meter power grid. You save about 50% over batteries.