Generator Sizing
Posted: Tue Sep 09, 2008 1:29 pm
Does any one know the correct method for determining electrical generator capacity based on anticipated watt usage?
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Total the watt ratings of all the AC-powered components on your boat. A boat's total current draw is expressed in kilowatts (kW), a term that means one thousand watts of electricity. As a rule of thumb, select a genset rated from 10 to 25 percent greater than the boat's average draw. In other words, if your totals add up to a load of 1,500 watts, then 2kW worth of genset is just about right. Extra capacity allows you room for future appliances, yet doesn't leave the engine loafing
To hitch hike on Purple's post, you have to add up the watt rating of everything you plan on powering with the generator.casingpoint wrote:Does any one know the correct method for determining electrical generator capacity based on anticipated watt usage?
This is a good idea, but I think the 120% fudge factor may not be the best number to pick for Texans in the summer.Kerbouchard wrote:If its for your home, the easiest way would be to look at your electric bill and take the Kw/hrs and divide it by 744(hours in a month with 31 days, adjust depending on month). This will give you your average usage over time. Next throw in a conservative factor such as 120% and you should be in the ball park.