Originally Posted by GeorgeB
Guitarguy, when I do the math your way, I still come up with 31 Amp hours per 15 minute "meal". I am not so much concerned when I am tied up to the dock but for the times I am "off the grid". Like outbound, my biggest headache is those at sea days when my navigation system, radio and lights are a major consumer of my house bank. for example, my sensors "cost" me 48 AH per 24 hours, and the chartplotter another 60. My housebank only has a usable capacity of 150 - 160 AHs and my solar panel isn't the most efficient with the boat rolling and yawing.
George... let's look at it again... 1500 watt appliance running 1 hour will be 1.5 kwatts per hour... a 1500 watt appliance running on 110 volts is using 13.6 amps per hour... ask any electrical engineer, electrician, etc.... the usage of watts drops as the appliance is reduced in time per minute.
Here is a simple calculator:
Calculate the Costs to Use Electricity - WebMath
add the 1500 watts and the number of mintues... see if you don't get the same answers I shown you... you may have to convert kwatt hours to minutes to get the actual watt/minute usage.
Does it make a little more sense now?