It comes down to cost ... every time.

 November1, 2022

Evaluating the cost of a 1000 amp controller vs. repairing my current 500 amp Curtis 1231C controller, considering my usual past usage history, I decided to repair the Curtis. ($800 vs. $2500) I will add a little additional cooling for the controller. Method and means yet to be decided.

Fried Eggs and Ham ...

Short story:

Friday, 9/9/2022: Warm day 90+, pulling max power, up a fairly long grade on Hwy 195. At the top of the hill, I let up on the accelerator pedal and the power immediately dropped to zero. I pushed the pedal back in a bit and "whamo" it went to full 100% power. Let off and zero power. Using FULL ON/FULL OFF, I ratcheted into the Pullman Building Supply parking lot. The good people there helped push me into a suitable parking spot whereby I called a tow truck. Controller fried!

I have been looking for an excuse to upgrade from the current 500 Amp controller to a 1000 Amp controller. I think I just found one! <smile>