Re: solar panel question, understanding the specs.
Volts X Amps=Watts
Watts are watts are watts regardless of voltage.
12 volts X 12 amps= 144 watts
120 volts X 1.2 amps = 144 watts
An mppt controller can convert higher voltages and lower amperages to lower voltages and higher amperages. (minus controller loses however.)
Please note, being a moderator does not add any weight to my opinions 300 watts Siemens/BP panels,plus a Sun 90,, making ~400. ~30 amps into Rogue MPT-3024, 450 ah of Trojan T-105, Morningstar ts300 inverter, a Tri-Metric meter.a collection of antique generators, plus 2 Honda eu-1000i's (also a BS2512 IX controller) and assorted other stuff!