amps watts volts and what im doing?

2 Posts
Jun 20, 2007 10:20 pm
amps watts volts and what im doing?

i have 6 kyocera kc130 panels wired to make 24 volts.i get 13.5 at the panels 12.5to13.5 at the battery's thats 8 L16 th-are wired for 12v i have a c60 charge controller set to 12v o"yeah 200ft cable from panel. now hears the question do i still have at least 600w and dose this change 30amps to 1/2 that and will i have to change again to make this work right.
 
578 Posts
Jun 21, 2007 11:50 am
Re: amps watts volts and what im doing?

If you have a 12v battery bank, why are your modules wired for 24v? 

your C60 is not capable of down converting.

your modules need to be at 12v if you want to use that controller.  you will need a combiner box and 6 breakers or fuses to do this correctly.

at 200 ft at 12v you cant even use 4/0 wire and be under 5% voltage drop.

you should probably use an mppt controller like an mx 60 and wire the modules for 36v and even then you are using #4 or #2 wire.

james - Alt-E staff

AltE
"Making Renewable Do-able"
http://www.altEstore.com/

Tel: 877.878.4060 x107  or +1.978.562.5858 x107
Fax: 877.242.6718  or +1.978.562.5854
 
2 Posts
Jun 21, 2007 11:37 pm
Re: amps watts volts and what im doing?

actually xantrex says i can run up to 55volts open circuit witch puts me well within the limits.
 
578 Posts
Jun 22, 2007 04:35 pm
Re: amps watts volts and what im doing?

right . . . it can take 55voc for a 24v pv system.  that works fine when you have a 24v battery bank and the voltage jumper on your c60 set to 24v. 

I called Xantrex tech support and they said (regarding a 24v nominal pv array attached to a 12v battery bank and c60 set for 12v) "that is certainly not the optimal way to do things, but we don't think it will blow anything up. Essentially the controller will try to pull down the solar voltage to charge the battery.  they array will not be utilized to its full potential" 

If you want a system with a higher pv voltage than battery voltage, an mppt controller that is capable of down converting is in order.


good luck with your system, hope that helps.

james - Alt-E staff

AltE
"Making Renewable Do-able"
http://www.altEstore.com/

Tel: 877.878.4060 x107  or +1.978.562.5858 x107
Fax: 877.242.6718  or +1.978.562.5854
 

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