T&T: Dometics new 12 volt air conditioning system

[Robin Brueckner]

The key cooling efficiency factor for either an air conditioner or heat pump
is the SEER (Seasonal Energy Efficiency Ratio) which vary from 13 to 19 for
homes. A 15 rating, for example, means you get 15 BTU's for each watt
consumed.

For a 3500 BTU air conditioner, dividing by 15 gives 233 watts of power
required...at 12 volts that's 233/12 or at least 19 amps. IF it runs 60%
during an eight hour night: .60 x 8 x 19 or about 91 amp hours.

That's about the limit an 8D deep cycle battery should be discharged (if
around 220 amp hours) before recharging...so on a hot sticky night at least it
might bring down humidity even if temps are still a bit high. If the SEER is
13, power draw is about 105 amp hours...

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