input from 3 different power sources and battery backup

[kat35601]

I need a device that will take input from 110v(home),12v(car),Solar Panel and works as a battery backup with two 7ah gel cell or SLA batteries..


Output would be 12v up to 20A

 

[CDRIVE]

Please draw it. It doesn't have to be a legitimate schematic, just a conceptual drawing.

 

[CocaCola]

I agree with cdrive, what exactly are you trying to do? Define 'take input' mostly...

One thing to keep in mind, even with two 7ah 12 volt batteries with a draw of 20A your run time will be measured in minutes, probably under 30...

 

[donkey]

http://www.ebay.com.au/itm/B02-Sola.../260952502691?pt=AU_Solar&hash=item3cc1fb31a3
I do NOT endorse this guy as I have NO knowledge of him. however scroll down to bout half way and he shows a diagram that shows how to charge a single battery.

 

[kat35601]

More Info

If you look at the drawing you will see at the top my inputs 110v, 12v and solar.
I can also add more batteries if needed. I will be running a mini-itx computer with a solid state drive (160 watts) and a ham radio (5-100 watts) depending on what’s needed to make contact. Most of the time this will run off of the car 12v but I need to be able to run off of 110v (generator) when that is an option. The internal Batteries should be able to run the radio on low power for a while if it needs to. Solar is for charging the batteries in down time and running the radio on low power. I will also have outlets for 110v and 12v so cell phones etc... can be charged from this box(when on 110v or 12v I have a 500 watt DC to AC inverter)

This box will be used for emergency commutations.


Thanks of the help
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