If your interested in Keeping your Battery Alive and in Top Running Condition.
This is my Experience:
Building My Trickle / Balance Charger
If anyone is interested i can build you this System. You would just have to Connect it to your Car. I use all original MEANWELL supplies ( more $$ then the China ones on different websites) And the Whole system cost me about $140. That includes Shipping from PeaktoPeak, Diodes, New roll of Wire, Male/Female Plug, Adapters, Soldering wire, Electric Tape, Ect....
I will Sell anyone a PreWired System for $200 Plus Shipping. I think $60 is ok for my Time to Build it. However i do not have any Cases for it, so you can be Creative and use your own.
PM me if you are interested and ill send you a Company Invoice