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Old 04-05-2023, 05:39 PM   #21
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Brand: Still Looking
State: Texas
Posts: 6,187
THOR #2121
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Originally Posted by RizeMaster View Post
Wouldn't it be simpler to just use Watts and Watt-hours for this sort of stuff? That way, any differing voltage can be disregarded. For example, if you have four 1200Wh batteries, you can power an 1100W A/C for about 4 hours, no matter if it runs on 12, 24, 48 or 110V. Of course you have to consider inverter losses and such, but just a rough percentage will give an idea.


With A/C's (and fridges etc) cycling on and off this is a very rough estimate anyway, greatly affected by the ambient temp and how low you set the temp controller...

Yes, but getting others to use Watts for power and Watt-hours for energy isnít easy when the entire RV industry have been using crazy units of measure, which ironically were first applied to simplify power and energy estimates for non-technical people.

When everything was 12 VDC, and prior to inverter/chargers which now comingle (convert) 12 VDC to 120 VAC back and forth, average campers could handle energy usage by tracking Amps and or Amp-hours.

Inverter/chargers complicated that a lot for non-technical types, not to mention that comparing Amps and Amp-hours between 12, 24, and 48 VDC makes it even worse.

Bottom line is I agree with you and have done my part when practical to get back to correct units of measure, hoping that in time everyone will see and analyze power and energy in a much simpler way. Learning or feeling comfortable with different units of measure will just take time.

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