[mesquaukee]

Originally Posted by BlueSovereign

What an educational thread!

I may no longer be "running on empty" when it comes to understanding Electrical topics, however I'm still "a work in progress", and this area of inverters is new to me. Coincidently I'm installing a 2000 watt Mastervolt Combi (100amp/2000 watts)......
However everything down under is at 230-240V AC.

Could someone address the issues and concepts presented in this thread to my 230-240V down-under circumstances?

For example:

@ 80% efficiency will that mean I will "frying/excesively draining" something if I use a 1600-1800 watt @ 230-240V water kettle, and if not how long can I use it?

As the inverter is a full sine wave, how long can I charge my PC without "frying/excesively draining" something?

Other pertintent data, consideratons, etc. I should be aware of/keep in mind would also be appreciated.

BTW, my House Bank will be 900 A/hrs (12V DC) ... which means, as I understand it, 80%-50% capacity (30%) means I will have ~270 A/hrs to work with.

Gracias in advance.

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.

Don’t 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
Amps.
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 couldn’t even begin to guess. Use propane.