Originally Posted by Auger01
I would put your "on-off" switches for the batteries
between the main battery fuse and the buss bars and put the bilge pump
to the house battery and put the alternator to the buss bar.
The way you have it drawn now if your house bank dies, sure you can start the engine, but you aren't going very far. Unless the engine runs on a magneto, its needs power to run plus whatever else you leave on will drain the start battery fairly rapidly.
If you put the alternator on the buss bar after the battery switch, whenever you use your emergency switch, the start battery will get charged by the alternator and/or solar
. The only disadvantage of doing it that way is that you need to make sure the either the house or the emergency switch is "on" otherwise the alternator output wont be connected to a battery, which could cause damage to the alternator or other equipment
I know this thread is getting old and the system is probably locked down already but that's what has been bugging me as well.
I like the "engine" stuff on one side and the "house" stuff on the other. Presumably to start the engine you are gonna need some sort of battery connected. The attached schematic puts the alternator on the engine side and presuming someone turned on a battery you can't fry the alternator.
The switches are marked "House" and "Engine" - To me this intuitively indicates what 'system" I am supplying.
The 1 and 2 posts of each switch indicate what you are supplying "from" Bank 1 or Bank 2, House or Engine and I would label them "House Bank" and "Engine Bank"
1-2-All switches give you complete flexibility on which bank supplies which system.
The ACR won't parallel if either bank is failed (low voltage or high voltage) so it's a matter of isolating the banks with the two switches. Want to run the whole boat
on House Bank or Start Bank? Easy peasy.
can run heavy gauge, taking advantage of engine on via ACR (e.g. Engine switch left in Engine Bank) or can run off an echo charger
from the distribution bus for anyone who wants that.
The only caveat here is that for any non-engine charging
to occur the house has to be in at least the House Bank position. If it is not clear the "normal" position is -
- House switch to House Bank
- Engine switch to Engine Bank
If you wanted to make the boat
dark and leave it but wanted a battery maintainer, maybe you add a maintainer solar panel directly to the house bank.
I'd be happy to hear what's wrong with my schematic - Always learning
Originally Posted by mtompson
Thanks Auger01 ( sorry for late reply! ) the way I see it, even with the house switch off, the charge sources inc alternator will go through the echo as normal? I'm not sure if a dead house battery will upset the echo bridge over to the aux battery?
The way you are wired - if the house fails you switch it off to isolate it. However all your charge sources are still trying to fill a dead bank - it could be dead shorted for all we know. I think you will have bad results.