Solar Controllers--Don't be a Sucker! :(
Just got to say it again, how it is we are sitting here for five months off grid on solar with no problems at all (third season on solar like this), using the non-programmable, non-MPPT, solar control...
Forum Discussion
I understand nobody might have the info I want, since who has the equipment handy to do the tests? But I was hoping there was a theoretical math way to get it.
If it is true that MPPT gain is better over PWM using 12v panels than with equal wattage of 24v panels, could it be from having to make that conversion back to "12v" as an extra step where there are losses ?
If so, then the MPPT would do as well if the batteries were 24v. But Rvs have 12v.
I am still stuck on jimindenver's results getting about 15a with 235w and 24v with MPPT, while two 120v 12s will do 15.2 at Isc (my 120 I had before got its 7.6a Isc no problem)
We need more data. So far Salvo got 8% more using 12v, but jimindenver breaks even with 24v. Hence my question re that conversion back to "12v"
If it is true that MPPT gain is better over PWM using 12v panels than with equal wattage of 24v panels, could it be from having to make that conversion back to "12v" as an extra step where there are losses ?
If so, then the MPPT would do as well if the batteries were 24v. But Rvs have 12v.
I am still stuck on jimindenver's results getting about 15a with 235w and 24v with MPPT, while two 120v 12s will do 15.2 at Isc (my 120 I had before got its 7.6a Isc no problem)
We need more data. So far Salvo got 8% more using 12v, but jimindenver breaks even with 24v. Hence my question re that conversion back to "12v"
