Re: Battery Charge Rate C/8 or??
No, it is a peak rate of charging. Not the same thing as a quantity replacement (Amp hours).
Originally Posted by ywhic
40 Amps * 100 / 330 Amp hours = 12% charge rate. No worries.
I ask because if the stars align my array will be pumping the VMP of 40.25 amps per hour (8.05 VMP * 5 panels).. (currently seeing 6.50-7.60 amps in testing)
I am planning on a 330 AH battery bank of 12v batteries.. (I know, I know...)
(MS TS45 PWM Controller Absorb is set to 14.4VDC)
Which if this is correct, I will be at C/8 more or less.. 330/8 = 41.25 amps..
Is this OK (with the 40.25 amps coming in) and correct??
Should I bump my bank to 440 AH and be at a C/10 rate or just start with 330 AH and see what happens??
Just nailing down the details..
Remember that is a peak potential charge (or current) rate; it is not the current that will flow to the batteries throughout the charge cycle. As battery Voltage comes up its internal resistance rises and the current will go down. When the Absorb and Float stages are reached the controller will begin to pulse to keep the Voltage at the proper level, and again the current will diminish. Put a load on, more current is needed to keep the Voltage from dropping, the controller will try to make up the difference from the panels.
It's pretty rare to come across an instance of too much current going to a battery. Between the battery itself and the charge controller things usually work out fine.
Four 175 Watt panels, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.
Ohm's Law: Amps = Volts / Ohms
Power Formula: Watts = Volts * Amps