Anyone know of a part number for a non-hella (cheaper) relay that can be
used for  2nd battery setup in a van without an existing 2nd battery relay?
Or a website with wiring diagram for non-hella relay 2nd battery charging
system?  There are a couple of very helpful sites with hella relay 2nd
battery info using the hella relay:

http://www.geocities.com/harald_nancy/relay.htm
http://www.gowesty.com/auxbatterytech.html

Thanks,
Andrew