Installation Guide

Classic owner’s manual Rev I 2193
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P a g e 1 0 - 0 0 1 - 1 R E V : I
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
Unpacking the Classic
When you receive your Classic you will want to unpack it and make sure everything is there and in good shape.
Refer to Figure 1 Included in the Classic package should be:
*Classic charge controller *Battery temperature sensor, *User’s manual, printed
*Knock out covers 3 screened *Parts bag with stickers, Terminal block cover and silicone grease
Email [e-mail] for more information or if anything is missing or damaged.
Figure 1