Forum Discussion

djgodden's avatar
djgodden
Explorer
Dec 17, 2015

Our under installation solar system for our Montana

I haven't considered what load this system will be sustaining, I've simply done a bit of research (enough to be dangerous) and selected what I can afford thinking ahead to expansion. It may be much l...
full_mosey's avatar
full_mosey
Explorer
Dec 18, 2015
pianotuna wrote:
Hi MPPT offers 8% improvement in solar harvest with nominal 12 volt panels.

ewarnerusa wrote:
Does MPPT offer any advantage with 12V panels? I thought that it did not.
I don't think that inverter could start the air conditioner compressor.


Maybe, if there is such a thing as a typical 12V nominal panel.

Example: I have a 130W(19.6V * 6.44A) mono panel with 7.44A ISC.

PWM = 107W / 14.4V = 7.44A.
MPPT = 130W / 14.4V = 9A.

That is a 23W advantage for MPPT, or 23/107 = 21.5%.

HTH;
John

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