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- From: dick@hpscit.sc.hp.com (Dick Lucas)
- Date: Thu, 31 Dec 1992 17:01:33 GMT
- Subject: Re: inverter and battery use
- Message-ID: <50700063@hpscit.sc.hp.com>
- Organization: Hewlett-Packard, Santa Clara, CA
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpcc05!hpscit!dick
- Newsgroups: rec.boats
- References: <mshulman.18.725765468@genghis.borland.com>
- Lines: 10
-
- You are confusing Amp-hours with power... The microwave consumes 600 watts,
- and with a 50% efficiency inverter, you need 1200 watts input from the
- batteries. A 12 volt battery must deliver 100 amps to deliver 1200 watts to
- the inverter (12 volts X 100 A = 1200 watts) At 100 amps, the 450 A-hr
- batteries will last only 4.5 hours. However, at this current level, they
- might have sufficient internal impedance that the voltage might drop and the
- real output might be well below the stated A-hr capacity.
-
- Dick Lucas
-
-