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#1
posted to rec.boats.electronics
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Power inverter vs. portable generator?
On Mon, 3 Jul 2006 20:39:07 -0700, "Duffer2"
wrote: Thinking about installing a 2000watt Power Inverter to run a 1000W (1350W @ 120vac consumed) microwave oven and to heat my hot water tank 1200W @ 120vac not at the same time. Or to use a 2KW portable generator. When heating the water, I estimate that the run time is about 20 minutes to achieve max temp. I'm wondering if my house batteries could handle the additional load of an inverter. My boat has a 300HP outboard with 60-70 Amp alternator (i cannot increase or change the alternator) help is neeed for an old "Duffer" You need to consider the size of your house batteries plus another important item. Considering inefficiences, you're talking about using maybe 40 amp hours to heat the water. A 4D (183 Amp hours and 130 pounds) ) or 8D (225 Amp hours and 160 pounds) gel cell would probably be adequate. You would need to run the engine almost twice as long as you run the microwave to recharge. The other item is that unless you spring for some really big bucks, inverters do not put out a real sine wave, and microwave ovens seem to be sensitive to that. Power output drops off, things overheat. By the way, we burned up a coffee grinder and a power tool battery charger using the inverter. Our seagoing Winnebago has about 1000 Amp hours of house batteries and we don't run the microwave on the inverter more than a minute or two. |
#2
posted to rec.boats.electronics
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Power inverter vs. portable generator?
Dick Locke wrote in
news gel cell would probably be adequate. AAAAAAAAAAAAAAAAACK! 100A off a gelcell for 30 minutes?!! BOOOOM! No cooling! Melt it!! AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACK!! |
#3
posted to rec.boats.electronics
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Power inverter vs. portable generator?
On Tue, 04 Jul 2006 14:31:51 -0400, Larry wrote:
Dick Locke wrote in news gel cell would probably be adequate. AAAAAAAAAAAAAAAAACK! 100A off a gelcell for 30 minutes?!! BOOOOM! No cooling! Melt it!! AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACK!! Hmmm, maybe I've overlooked something...heating of the battery should be 100 amps times the internal resistance. I don't have a clue what that is. Educate me! |
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