I would like to improve my charging
system by making it more automatic and foolproof. I have a few specific questions but also would appreciate feedback on the overall plan.
1. Add either an Echo Charge (15 A) or Duo Charge (30 A) to charge the start battery
, which is a standard group 24 flooded battery
. This enables charging
the start battery from any of three sources: AC shore power
, engine alternator
, and solar
. Echo Charge consumes less than 50 ma when not charging so it can be left on all the time (allowing solar
to keep both banks topped off). The Duo Charge consumes 500 ma and would need to be switched off when there's less than .5 amps of charging source.
2. Wire the alternator
output to house bank to eliminate chance of frying the diodes in case someone turns the 1/2/all Perko switch to off.
3. Rewire the ProStar 15 PWM solar controller. This is a smart controller/charger that varies the solar power output depending on battery charging needs and other electrical
demand. Currently the "Load" terminal of the controller is the supply for my DC panel. The controller charges the house bank when solar power exceeds demand. When demand is greater, the controller outputs maximum available solar power AND draws from house. How is the "Load" terminal helpful
? It seems simpler to supply the panel directly from the house bank.
advised switching off solar power when charging from alternator to avoid confusing the alternator regulator
. I would want to automate this and thought of using a low voltage disconnect and a normally closed relay between the solar panel and controller; when there's energy coming from the alternator (or AC charger) then the relay energizes and opens the solar circuit. Thoughts?