• PolarStorm has captured the efficiency of a 48 volt, 3 phase, 6 HP, AC motor. PolarStorm draws only 35 amps at 48 volts while running.
• Because of the enormous HP and the 21,000 BTU cold air output, PolarStorm has to run only about 25% of the time to keep the sleeper at a comfortable temperature.
PolarStorm uses a 48 volt, 3 phase AC motor drawing 25 amps 25% of the time using a 48 volt LiFePo4 battery. PolarStorm draws 25 amps while running, but only runs an average 25% of the time. 25 amps x .25 = 6.25 amps per hour
12 Volt DC motors turning a compressor. Output 13,000 BTU maximum. These units run 75% of the time. The problem with these units is that the current draw is so high, that over a 1 HP (750W) motor would require so many batteries as to make the unit impracticable. On top of compressor motor load they must also support a condenser cooling fan drawing an average of another 16 amps per hour.
12 Volt Inverter type running a 110 VAC compressor and motor. Most have a rated maximum current draw at 110 vac of 8 .5 amps. They also must support a condenser cooling fan drawing an average another 16 amps hour.
1200 W / 48 V = 25 amps (per hr) 25 amps x .25 = 6.25 amps per hour.
With the LiFePo4 battery the unit will run for 12 hours while drawing the battery down to 44 volts.
750w / 12v = 62.5 amps (per hr) + 16 amps (for the fan) = 78.5 amps x .75 (running 75% of time) = 59 amps per hour.
With 4 - 100 amp 12 volt batteries, the unit will run for 6.77 hours before the battery bank is dead.
8.5 amp x 110v = 935w/12v=77.91 amp (per hr) + 16 amps (for the fan) = 94 amp x .75 (running 75% of time) = 70.5 amps per hour
400 amps battery pack at 12 volts/70.5 = 5.67 hours before the battery pack is dead.