iv/power curve
Questions, smallish PWM portable When a PWM controller limits voltage to 15v, the panel must be operating at 15v+ (blue area) to make up for any voltage drop? If conditions are such that Vmp has...
Forum Discussion
Hi BFL13,
While I do indeed have equalize--the 15.4 volts was during normal operation when the temperature hit -34 C.
Those 19 "extra" watts less overhead amount to about an additional amp going into the battery bank.
If we get "quirky" with the math the extra 12 watts sorta kinda makes the panel "worth" 0.74 cents per watt more or $8.88. In the bad old days a watt cost 5.50 so the panel became "worth" an extra $66.00. Since I have four panels at that "old" price, the savings were $264.00 which more than paid for the difference in price of MPPT vs PWM.
While I do indeed have equalize--the 15.4 volts was during normal operation when the temperature hit -34 C.
Those 19 "extra" watts less overhead amount to about an additional amp going into the battery bank.
If we get "quirky" with the math the extra 12 watts sorta kinda makes the panel "worth" 0.74 cents per watt more or $8.88. In the bad old days a watt cost 5.50 so the panel became "worth" an extra $66.00. Since I have four panels at that "old" price, the savings were $264.00 which more than paid for the difference in price of MPPT vs PWM.
BFL13 wrote:
(PT forgot to mention his controller has an Equalize setting )
