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Can you build your own uninterruptible power supply with a car battery, an inverter, and a battery charger?
The point is to create a UPS with a very long run time when the main power goes out.
Can you hook the charger to the car battery terminals and then attach an inverter to the same terminals (in parallel they call it?). You then plug your computer or whatever to the inverter.
The whole setup would have to automatic. For instance, the charger can sense when the battery is fully charged and turn itself off automatically. With the setup, you shouldn't have to plug or unplug things manually based on what you're doing. It should be automatic, transparent, and operate in the background like any UPS.
Is this at all possible, or is it much more complex to get something like this working? Is this a fire or electrocution hazard? Will the equipment burn out the moment you hook everything together?
A battery charger that will do what you want will cost a very pretty penny. I would stick with the toys that are made to do that. And I agree with the posting above. A car battery has thin lead plates and would not hold up very long at all to the task.
Read this link, it will tell you how to do it just don't put the solar panels or charge controller on it. It is all in the Inverter.
http://www.oynot.com/solar-power.html
Buy this kind of batteries Deep Cycle.
http://store.oynot.com/concorde-sun-xtender-batteries.html
Get one of these types of inverters because most modified sine wave inverters are cheapies and will not allow a power strip or a desktop computer because they use a neutral ground. This makes the inverter switch off till the ground is removed. These work great. And they are true sine wave like normal house electric. Modified sine wave inverters will make motors hammer and shorten their lifes. Some make radios and TV sets buzz. I said some not all. There are some high grade modified sinewave inverters but if paying that much money may as well get a good one with a built in battery charger.
http://store.oynot.com/statpower-prosine.html
But it is going to cost a little cash. I have a backup electric system setup but it is solar powered.
