We made the West Marine battery combiner for them for 13 years but now
are using Defender as our primary retailer - you will find Defender's
prices are much better than WM had. I don't know what is wrong with
other combiners but we've not had any of the problems you describe with
over 26,000 sold and all on UNCONDITIONAL warranty. If there were a
problem we surely would have heard something by now.

You can download the owner's manual from
http://www.yandina.com/acrobats/C150Data.pdf
and you will find a number of suggested schematics.

You can contact Defender at
http://www.defender.com/product.jsp?path=-1|328|51495|606044&id=605590

I will be happy to answer any questions you have.

Regards,

Andina Marie Foster,