| Re: Check my electrical math- battery to inverter to Air Con [message #370337 is a reply to message #370335] |
Wed, 10 August 2022 09:52   |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
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kingd wrote on Wed, 10 August 2022 09:29Dave, remember the available "amp-hours" are at the "rated" current draw. I believe if the actual draw is a lot higher
than the "rated" draw you won't get any where near the "rated" amp-hours.
See if you can find what the real world amp-hours is at 75 amps. That's a lot of amps.
Exactly- I think I'm accounting for that.
The manufacturer says the battery will deliver 75 amps for 120 min. but full discharge shortens the life of the battery so we go 60 min.
But that's for one pair of 6v batteries.
If we have three pairs then we have 25 amps per battery pair for 440 min- or half that for 220 min. or nealry 4 hours for $700
I also looked at some golf cart data- they are typically pulling 30 amps per battery to cruise at top speed so that seems like a sweet spot for the battery life cycle.
Dave & Ellen Silva
Hertford, NC
76 Birchaven, 1-ton and other stuff
Currently planning the Great american Road Trip Summer 2021
It's gonna take a lot of Adderall to get this thing right.
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