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Supplmental Home grid power Project | 4 comments (4 topical, editorial)

Re: Supplmental Home grid power Project (3.00 / 0) (#2)
by Old F on Fri Apr 4th, 2008 at 03:51:28 PM MST
(User Info) http://www.oldf.homestead.com

Jzeveney

I am thinking of doing something similar
Where did you get your relays ?

And are you planning to monitor battery state of charge so when the batteries reach set state of discharge It will trade to grid power and trade back when they are recharged

Sound like your having fun
Old F

Re: Supplmental Home grid power Project (3.00 / 0) (#4)
by jzeveney on Fri Apr 4th, 2008 at 08:52:12 PM MST
(User Info)

I purchased the relays from

http://www.mcmaster.com

Part number 7384k43 $23.22 Each

They are working great today.

And are you planning to monitor battery state of charge so when the batteries reach set state of discharge It will trade to grid power and trade back when they are recharged.

Yes. Currently the inverter has a low Battery voltage shutdown around: 10.0 Volts this is to low I think. but that could be the at load voltage I don't know yet.

10Volts will damage the batteries so yes I want to create something which will turn the inverter off when the battery bank drops to 6.20 Volts no load. I don't know yet what that equates to during inverter load. I'm plaining to run a 175 amp load tomorrow and monitor the bank voltage before and during the inverter load.

I'm currenlty running 5 pair of 6V deep cycle bats. 6.2 is 25% discharged and should help maintain battery life. (So I've read.) I may go as low as 6.1 but I'm taking it one step at a time.

Z

[ Parent ]

Supplmental Home grid power Project | 4 comments (4 topical, 0 editorial)

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