Battery bank voltage monitor

Hi, I’m looking for a low cost battery bank voltage controller like the Missouri Wind and Power one they have but that has an output if the battery voltage is high and a second output if the battery voltage is low. The first one would be to bring in a dump load via a SSR, the second one would be to open a SSR feeding my hot water cylinder. Bank is 24 volt.
Anyone know if something like this is available?
Thanks,
Anyone know if something like this is available?
Thanks,
Comments
Cheers,
I use a JLD5740 to control my chargers on my VW Conversion and Battery storage. It costs $40 and is stand alone with two relays each with a high and low set point.
Here is a link:
http://www.lightobject.com/Programmable-4-Digit-Blue-LED-ACDC-Volt-Meter-with-dual-control-Good-for-HHO-System-P407.aspx