Quote:
Originally Posted by MetroMPG
Oh! Blaming the car for how far you're pressing the "battery murder pedal", eh? 
Generally, drawing a 12.5 battery below 10.5 volts under sustained load is considered risky - chance of cell reversal (murder).
That of course limits how much current you can pull - which is the price for not murdering elderly batteries! |
I know, I know.
I originally had set my controller to a battery voltage min of 63.0V (1.75VPC, 10.5V/battery), but after a few km of driving, performance was embarrassing, especially at the beginning when I was switching batteries in and out to get a "decent" pack. I posed "the 10.5V question" on the diyelectriccar.com forum and one guy said even 1.5VPC is okay
for some batteries once batteries are going flat and are sagging like crazy.
Right now I have voltage minimum set to 55.0V, but at 55V, strong batteries may be at 11.2V while old junky batteries are at 7.0V. It's all about watching each battery voltage, but since my new pack is on its way, I don't really care. As long as they last a few more days!