Originally Posted by mesquaukee
Plug your labtop in just as you do in your house. The only problem would be the invertor uses power even when no load is on it. Check the literature.
Donít forget Peukerts coefficient. That electric coffee kettle is going to use more AHrs than amps X Hrs suggest. The invertor efficiency has nothing to do with Peukerts coefficient.
I am assuming 24 volts 450 AmpHr battery. 20 hr rate is 22.5 amps
A 1700 watt kettle/ 24 volts = 71 amps. Assume invertor efficiency of 85% yields 84
That is 3.7 times the 20 hr rate. At that rate the usable capacity of your battery bank is 75%. Your battery bank would be downrated to 337 AmpHr from 450 AmpHrs.. If you were to use 30% of your battery capacity you would have 100 Amphr to play with, at a 84 amp draw a little over an hour.
This is where it gets scary. When you recharge that battery bank the Peukert Effect rears up again and bites you. An 80 amp output from the alternator means 60 amps stored in the battery. So for every hour you use the kettle you need to charge for almost 2 hours. It will actually be longer as the charge rate will drop.
Using your battery bank in the 50% to 80% range is bad news for longevity.
Why in the world would you use an electric kettle on an invertor I couldnít even begin to guess. Use propane.
Thanks for this, it's genuinely appreciated.
You have just re-affirmed what my electronics
advisor down here told me just this weekend: Best use the kettle only when you run the Genset in the morning and evenings to charge up your batteries!
Regarding you propane
comment, I'm looking for 4.5kg alloy tanks
(very light) to replace my 3kg steel
. They use to sell them down here, but now only 5kgs are available. Even 4.5Kg was going to be "stretch", with 4kg tanks known to work. Two 4.5kg tanks would increase my propane capacity by 50% over my two 3kg tanks.
Any ideas? (probably should start a different thread for this query)