Classic SL owner’s manual REV E 2056
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The graphs above represent the max power output for a given input for each Classic. Using and
understanding these power graphs will help maximize Classic’s output power and aid in selecting wire and
breaker/disconnects. Notice that lower battery voltages and lower PV input voltages result in higher
continuous output power. The PV voltages listed are for reference and are not intended to be the only PV
voltages supported. The battery voltages listed show the most used battery bank configurations. Other
voltages are also supported. The Classic battery voltage parameters are fully user adjustable.
For example:
if you are using a Classic 250 and 48v battery bank, the maximum continuous output
power based on 25 degree C ambient is 55 amps when using a PV array that yields a Maximum Power
Voltage of 180 volts. The same set up using a bit higher voltage modules that result in a 200V Maximum
Power voltage will result in only 53 amps. Although 55 to 53 amps is not a significant change, it does give
you the idea that all things being equal, lower voltages are a bit more efficient, keeping in mind that an
MPPT controller needs to have the open circuit voltage of the array about 30% higher than the highest
battery voltage you plan to charge to.
NOTE: You can find the Classic string sizing tool on the web page www.midnitesolar.com
NOTE:
A typical solar module around 250 watts will be a 60 cell module so it’s open circuit voltage will be about
37 volts. So for a Classic 150-SL you could put 3 in series, A Classic 200-SL you could put 4-5 in series
and a Classic 250-SL you could put 5-6 in series. PLEASE NOTE this is not intended to be a sizing tool
but a general guide. Please follow the link above and size your array properly.
WARNING:
*VOC is a term you will hear a lot it stands for Volts Open Circuit, This is what is
used to determine how many modules can go in series. VOC will be printed on the
actual solar panel as well as on the spec sheet for the solar panel (For questions on the
values found on the solar panel please consult the panel manufacturer or the
distributor)
*NEVER connect any loads or other stuff to the PV input on the Classics (Or any
charge controller)
*Classics that have exceeded their HyperVOC voltage (safe voltage) will not be under
warranty.
*A Classic needs a MINIMUM Input voltage to turn on. To calculate this take the
highest voltage the battery will be at and multiply it by 1.33 if the PV input voltage is
lower than that value the Classic will not come out of resting.
Содержание Classic 150-SL
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