battery supply to transfer switch

David Jacobs
1 Posts
Nov 10, 2006 10:41 am
battery supply to transfer switch

I am not sure if this is feasible, but I have a 6 circuit manual transfer switch with a 240 volt plug that I use with my generator during power outages.

What would be involved with a battery supply to the transfer switch that could supply a maximum of 1800 watts for 4 hours, using the 240 volt plug?

Would keep the battery charged with line voltage and manually connect when needed, would be nice to use solar panels to keep charged, but not vital.

Thanks for any advice
 
 
Thomas Allen Schmidt
679 Posts
Nov 13, 2006 06:41 am
Re: battery supply to transfer switch

I am not so sure I understand, "a six circuit manual transfer switch"? A 6 pole transfer switch?         
As for the 1800 watts for 4 hours thats easy. Just pick a nominal battery voltage like 24 and divide.
4 x 1800 = 7200 watt hours load.
7200 / 24 = 300 amp hours
300 x 2 = 600 amp hours total capacity at 50% DoD all at the 20 hr. rate of course.
The reason for at least doubling the needed amp hours is to extend the overall life of the battery bank. Personally I would multiply by 5 for a 20% DoD (Depth of Discharge.)
As for turning all of this into 240 vac? or 120/240 vac? Just go to the store and start reading the specs. on inverters. Some have chargers some don't. Read the specs..
 
 

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