Re: [RE-wrenches] Xantrex C-40 Drifting

That's a pretty good size battery bank compared to the charge coming in, normally you only see this with very small battery banks. A battery when under charge is going thru a chemical reaction, this reaction doesn't immediately stop when you remove the charge, if you have a strong source on a s

[RE-wrenches] Fw: Xantrex C-40 Drifting

Hi: I didn't know that there were systems out there where a PWM charge controller such as the C-40 was producing an unhealthy, high battery voltage. Since there are, I may have a possible explanation. The C-series and other PWM type charge controllers operate by PWM whereby they very very qui

Re: [RE-wrenches] Fw: Xantrex C-40 Drifting

Hi Jarmo; Early solar systems actually tried to use the principle of matching array Vmpp to battery voltage in lieu of charge controllers. The biggest issue is that when it is is hot the module voltage can drop below the battery voltage needed, and when its cold the voltage will still be to

Re: [RE-wrenches] Fw: Xantrex C-40 Drifting

Hi: We haven't changed anything the in C40. The essence of my idea was that perhaps the "trouble" systems are the ones which have much higher module Voc versus battery Vfloat. JARMO _ Jarmo Venalainen |