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Old 02-01-2009, 15:06   #1
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inverter problem

I just burnt out a 3000 watt inverter.
Someone said it was because I had the inverter running at the same time as my outboards were running, putting a charge into the battery bank.
Is this correct?
any comments
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Old 02-01-2009, 15:17   #2
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beau, Not sure your outboards, you are talking about motors, would have any affect on your inverter. We run ours while under way all the time with the engine charging the battery. What kind of inverter do you have? How old is it? What were you running on it when it died? How is it tied into your boats electrical?
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Old 02-01-2009, 15:20   #3
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Is it an inverter/charger? Did you have the boat plugged in with the inverter charging while running the outboards? That might do it.
But when you are not plugged into the shore power, you should be able to run the engines to charge the batteries while the inverter is being used.
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Old 02-01-2009, 15:38   #4
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It was a 3000 watt inverter (not a inverter/charger) I bought new from ebay. Ok, it was a cheaper one from ebay.

I was only running a medium size fridge and freezer.

I would like to replace it with a pure sine, not a modified sine this time
and I obviously don't want it to happen again.
The models on ebay are so much cheaper than local stores in Australia.
and I am not sure the locally bought inverters are any better?
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Old 02-01-2009, 15:51   #5
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Quote:
Originally Posted by beau View Post
I just burnt out a 3000 watt inverter.
Someone said it was because I had the inverter running at the same time as my outboards were running, putting a charge into the battery bank.
Is this correct?
any comments
That should not be the problem. The boat I teach on has an inverter. When we run the microwave or the toaster, we must run the engine and the inverter. Otherwise there is too large a draw on the batteries.

Jack
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Old 02-01-2009, 16:20   #6
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On our tri i have run both at the same time without any problems btw my inverter is a dick smith brand 2500 watts my be it was just a faulty unit what about any warranty?
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Old 02-01-2009, 16:52   #7
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The outboard isn't the problem.

I looked on Ebay. I found the "Wagan Tech high efficient model #20072" and the "Power Express". The Power Express is advertised as "This inverter is made from the same factory as the Coleman brand". It's only $195 US and comes with a wireless remote control. Maybe to change channels?

I buy a lot on Ebay but I stay away from any mystery brands. The risk of getting junk is just too high.

A refrigerator is very tough on an inverter. The motor has a heavy surge when it starts and it runs many hours a day.

Switching to a pure sine unit is not necessarily the right solution. If the fridge ran fine on the modified sine it won't be better off on pure sine. It would be a much better idea to get a very high quality modified sine unit than try to go with a cheap pure sine unit.

Carl
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Old 02-01-2009, 17:18   #8
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Thank you Carl for your comments.
I do have a Dometic washing machine (wife on board) and the electronics wont run on modified sine which is why I was considering pure sine.
However I like your comments about getting a good quality modified sine an I might just sell or throw overboard the washine machine.
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