House/solar battery opinions
My current battery space is 20"L x 14"w x 10"H Going solar, and want to packs as much AH in there as I can (reasonably). Currently looking at 250 - 300. Price is not THE deciding factor, unless ...
Forum Discussion
westend wrote:
The SS MPPT-15 will disconnect from an overload condition. If more amps than than acceptable are seen by the controller, they go unused. The controller is rated to 75V, IIRC.
It is good that it shuts down to protect itself from burning out. I'll bet you have never observed a shutdown.
If you don't tilt, it is unlikely that you will ever exceed 210W into the controller. Temperature and tilt/insolation are major factors.
If you rerun the calculator link above, and set the minimum temp to 40F, you will see the calculator allows your configuration, even accounting for tilting.
The calculator does not account for flat panels. If you factor in flat panels, there is a significant drop in Amps as the sun angle decreases. In colder latitudes, the angular losses will automatically act against the lower temperature increases to keep lower Watts.
Sweet configuration!
HTH;
John
