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How much power do I need?
Under the rating conditions (85ºF inlet air, 86ºF cooling water), the system will draw 48 amps when running from a fully charged 12v battery bank. This equates to 600 watts. Systems operating from 24 volts batteries will draw 24 amps. This number includes the current draw of the seawater pump and the blower. Like the actual system capacity, the current draw will also change under different ambient conditions. If the water or air temperature is lower, the current draw will be reduced, and current can be increased if either is higher. In both 12v and 24v systems, the actual battery voltage effects both the cooling capacity and current draw of the system. A reduction in battery voltage due to low batteries or voltage drop in the wiring will result in lower cooling capacity and lower current draw. The system will shut down automatically if battery voltage drops below 11.5 volts.
How do I come up with enough 12/24v power?
The answer to this question is key to obtaining a satisfactory DC Breeze installation. Although the system is extremely efficient, it is easy to underestimate the amount of energy it takes to cool hot, humid air. Nevertheless, it is easier than you might think to create a low voltage A/C system which meets your needs. The important thing is to be realistic about your requirements and the amount of power you will need to meets them. Sources of power include:
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