PWM input voltage, Xantrex C40 test video
here is the Video link, the fluke is plugged directly into the Solar panel drop wiring before it enters the controller right above the panel input protection fuse, that i use for a disconnect just c...
Forum Discussion
My panel is dumb, operates @ Vbatt+loss or Vbatt+loss / Voc (on/off) to limit amps.
No need to operate at higher v (more watts) without bucking.
Bulk
"13.34v below fuse
Controller out
12.92v"
vout+.42v
"14.04v
controller out
13.64"
Vout+.4v
PWM? or (16.63-14.47) * 15.33A = 33.11 watts wasted!
"16.63v
controller out
14.47v"
PWM or (17.00-14.51) * 13.1A = 32.6 watts wasted
"17.00v
controller out
14.51v"
PWM or 16.62-13.92 * 16.10a = 43.47 Watts going to heat up controller?
"16.62
controller out
13.92v"
The 'duty cycle' limits amps. Watts in = watts out, during PWM, one can not use measured Vin volts since they are an ave of Vbatt and Voc while amps is an ave or Ipanel (Isc) and Ioc or zero.
Voc goes down with low light but the entire range of zero to Voc is available until light is very low.
No need to operate at higher v (more watts) without bucking.
Bulk
"13.34v below fuse
Controller out
12.92v"
vout+.42v
"14.04v
controller out
13.64"
Vout+.4v
PWM? or (16.63-14.47) * 15.33A = 33.11 watts wasted!
"16.63v
controller out
14.47v"
PWM or (17.00-14.51) * 13.1A = 32.6 watts wasted
"17.00v
controller out
14.51v"
PWM or 16.62-13.92 * 16.10a = 43.47 Watts going to heat up controller?
"16.62
controller out
13.92v"
The 'duty cycle' limits amps. Watts in = watts out, during PWM, one can not use measured Vin volts since they are an ave of Vbatt and Voc while amps is an ave or Ipanel (Isc) and Ioc or zero.
Voc goes down with low light but the entire range of zero to Voc is available until light is very low.
