Blue Sea has some circuit diagrams on their website and in their catalog, but, you have to have a basic understanding of battery circuits and battery management. They do a lousy job of describing their switches though. I have been looking at them myself the last few weeks and I have had to go to multiple sources to figure out how some of their switches really work.
The Dual Plus 5511e switch is primarily designed to simultaneously switch two separate battery banks to two separate loads, and to combine/parallel the batteries/loads if required. It has two inputs for two battery banks and two separate load outputs. So you can turn on the start battery-starter circuit and the house battery-house circuit with one turn on the switch. Or you can combine all loads and batteries together at a different switch selection. You have Off-On-Combine as your options. So you cannot keep the start circuit off when you have the house circuit on and vice versa.
There are times you might want to combine your batteries if one is dead and you need juice to power the other circuit. E.g. if the start battery is dead and you need to start the engine
with the house battery, or, the house battery is dead and you need to use the VHF radio
or power lights or whatever (in an emergency
If you want to charge both the house and start batteries at the same time from whatever charge source(s) you have when you set the 5511e to "combine". I don't like doing this myself as you will be charging
what are normally two different types of batteries with the same charge regimen. For the same reason, I don't like combining relays, which are a separate device to automatically combine two battery banks when one (normally the house) is being charge over a given set voltage. I prefer to use the Xantrex Echo Charge (or similar) to give a "trickle" charge to the start battery when the house battery is being charged. The start battery normally does not need a heavy charge. But if you need to, you could combine or parallel the banks during charging
if your switches are set up to do that - like with the 5511e.
Your controller is designed to manage the type of charge you get from your solar panels
so that the battery charging is maximized with no damage to your batteries. Interestingly, I can't find any charge controllers on the Xantrex website - at all - any flavor. But I did find some docs on it on some wind/solar power vendors. It looks like it can charge only one battery bank. You would use it for converting your solar
power so the batteries can be charged effectively and efficiently. It is not the best type as it is uses Pulse Width Modulation (PWM) instead of MPPT
. There are multiple discussions here on that issue. It will work though. So it would be connected between your solar panels
and your batteries (one bank).
It is not a relay or a combiner and does nothing to charge more than one set of batteries. So you would need a separate switch and/or relay to combine batteries with or without the charge controller.
There are more varieties of switches than there used to be. I personally like having three switches - one start, one house, and one to parallel both but that is a bit much for a smaller boat. And any particular combo type switch can be wired in different ways to accomplish specific things.
But, a very usual configuration for a boat with a start battery, house battery(s), one engine
starter, and separate house loads could use the 5511e. One battery is on "1", one on "2", starter on output "1" and house panel/circuits on output "2". Your solar charge controller would be wired to the house batteries. Your alternator
ditto. If your house battery is similar to the start battery (wet flooded both) then you could combine them when charging - i.e. with the engine alternator
or the solar panels
. When they aren't combined the house battery would be charged but not the start battery. You could add the Echo Charge (or similar) to charge the start battery any time the house battery is being charged, regardless of whether the banks are combined or not. Or you could add a separate battery combiner/relay (but for the same money
I would go with the Echo Charge).
If you need more info you need to give more info on what you have and want to do. Good luck and welcome to the complexities of battery circuits.