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Battery switch questions, electrical help

Old 02-19-2015, 11:38 AM
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Default Battery switch questions, electrical help

I purchased my boat a few months back. The electrical works fine, but I'm trying to understand the labeling on the 2 battery switches.

The boat has 4 batteries. Originally i thought each switch controlled 2 battieries, but upon inspection, its not. out of the 4 batteries, I have 2 sets of 2 run in parallel.

Are the labels on the switches correct? I have drawn out how its hooked up. I feel like the labels are not correct, or i'm not understanding how its correct. I want to be able to Not run down my starter battery if i'm ever just sitting around and using the radio or running the bait pump.

I'd prefer not to rewire, and just label it accordingly and know how to use the switches so i can isolate just the house battery to use when the motor is not on for extended periods of time.

Thanks in advance!
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Last edited by flyhigh123; 02-20-2015 at 09:47 AM.
Old 02-19-2015, 06:23 PM
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that looks messed up... where are you house loads? they are not in the pic.
Old 02-19-2015, 07:14 PM
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From your diagram, Switch 1 (labeled "house bank") selects between the two battery banks. Switch 2 (labeled "1-Starting 2-House") appears to connect the engine/alternator to the charger or the battery selected by Switch 1.

I don't know why anyone would wire the switches that way. Do you have photos of the batteries? Or where the house panel(s) are connected to the switches? It's not clear from the diagram how the house is powered. Where do those three smaller wires on Switch 2 Common go (they're shown in the photo but not the diagram)?
Old 02-20-2015, 06:28 AM
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There is a lot going on here and yabbut made a good point about the charger.

Please clarify your battery setup. When you say in series, do you truly mean series, as in a 24v output?
What is the make/model of the batteries and the charger?
I ask because I can tell you if the charger is right for the application. Also, I am concerned that the charger is running through the switch, which is not suggested for a number of reasons.
Old 02-20-2015, 09:36 AM
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Originally Posted by smac999 View Post
that looks messed up... where are you house loads? they are not in the pic.
The house loads are the smaller red cables connected to the starter/battery line.

Originally Posted by yabbut View Post
From your diagram, Switch 1 (labeled "house bank") selects between the two battery banks. Switch 2 (labeled "1-Starting 2-House") appears to connect the engine/alternator to the charger or the battery selected by Switch 1.

I don't know why anyone would wire the switches that way. Do you have photos of the batteries? Or where the house panel(s) are connected to the switches? It's not clear from the diagram how the house is powered. Where do those three smaller wires on Switch 2 Common go (they're shown in the photo but not the diagram)?
I will take pictures of the batteries later today.

Originally Posted by ChargerGuy View Post
There is a lot going on here and yabbut made a good point about the charger.

Please clarify your battery setup. When you say in series, do you truly mean series, as in a 24v output?
What is the make/model of the batteries and the charger?
I ask because I can tell you if the charger is right for the application. Also, I am concerned that the charger is running through the switch, which is not suggested for a number of reasons.
The charger is an older model, Heart Freedom 10. I will check to see how the battery is wired. It could be parallel and i made a mistake.


also, if you guys have suggestions on how to properly rewire it, i am up to make the changes.


By the looks of it, as mentioned above, switch one, 1 is 2 batteries, 2 is 2 batteries, so i can label one house, and one starter. The switch 2, i should leave it on both as these dont affect anything.?

Last edited by flyhigh123; 02-20-2015 at 09:48 AM.
Old 02-20-2015, 05:05 PM
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Originally Posted by flyhigh123 View Post
The house loads are the smaller red cables connected to the starter/battery line.



I will take pictures of the batteries later today.



The charger is an older model, Heart Freedom 10. I will check to see how the battery is wired. It could be parallel and i made a mistake.


also, if you guys have suggestions on how to properly rewire it, i am up to make the changes.


By the looks of it, as mentioned above, switch one, 1 is 2 batteries, 2 is 2 batteries, so i can label one house, and one starter. The switch 2, i should leave it on both as these dont affect anything.?
Sure thing, the more details the better.
Old 02-20-2015, 05:24 PM
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Wouldn't Switch 2 have to be in "BOTH" to charge the batteries from the inverter/charger?

Last edited by Tawn; 02-21-2015 at 03:41 AM.
Old 02-27-2015, 09:50 PM
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Are you sure you have switch 2 laid out right - that the common goes to the engine? That's a head-banger, since why would you ever want to connect the engine to the inverter/charger with no battery involved?

Since it's not the ideal anyway, I'd say there is no harm in having all of the switch 2 connections on a bus bar and ignore the switch. Then the inverter/charger and engine would both run from whichever battery you selected with switch 1. Expect that the inverter and maybe electronics might reset if cranking brought the voltage down too low. Since you show two batteries on each bank, can I guess that they're 6V deep cycles? That's fine, since we assume they start your engine OK, but expect a little more voltage drop on starting.

I think if I was looking for the best result from the least change, I'd connect the starter directly to one of the battery banks, then switch to "both" when at the dock or the engine is running (ie: charging), and to the battery that is not the start one when running the inverter, radios, and 'fridge at anchor.
Old 02-28-2015, 11:00 AM
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I suspect we are missing something in the drawings ... They don't show how the house loads draw? I suspect there are two battery banks. They doubled up two batteries to parallel them to make two big battery banks out of four batteries.

Now it could make sense if the "to starter/engine" was actually to the house loads. This setup would allow you to run the house off the inverter or either of the two battery banks.

Is it an inverter or a charger? A charger should not go through a switch ...

Clearly we need more info.

pat
Old 02-28-2015, 10:24 PM
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Originally Posted by patmcqueen View Post
I suspect we are missing something in the drawings ... They don't show how the house loads draw? I suspect there are two battery banks. They doubled up two batteries to parallel them to make two big battery banks out of four batteries.

Now it could make sense if the "to starter/engine" was actually to the house loads. This setup would allow you to run the house off the inverter or either of the two battery banks.

Is it an inverter or a charger? A charger should not go through a switch ...

Clearly we need more info.

pat
It's both an inverter and charger. What do u mean by battery bank?
Old 02-28-2015, 10:27 PM
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Originally Posted by patmcqueen View Post
I suspect we are missing something in the drawings ... They don't show how the house loads draw? I suspect there are two battery banks. They doubled up two batteries to parallel them to make two big battery banks out of four batteries.

Now it could make sense if the "to starter/engine" was actually to the house loads. This setup would allow you to run the house off the inverter or either of the two battery banks.

Is it an inverter or a charger? A charger should not go through a switch ...

Clearly we need more info.

pat
It's both an inverter and charger. What do u mean by battery bank? The starter/ engine is also the house load. The three smaller wires are the house loads.
Old 03-01-2015, 08:21 AM
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Originally Posted by flyhigh123 View Post
It's both an inverter and charger. What do u mean by battery bank? The starter/ engine is also the house load. The three smaller wires are the house loads.
based on the types of questions you are asking... with all due respect, i suggest you hire someone to come out.. or get a friend who is knowledgeable to come out and show you the basics.
Old 03-01-2015, 04:04 PM
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Originally Posted by Rico2 View Post
based on the types of questions you are asking... with all due respect, i suggest you hire someone to come out.. or get a friend who is knowledgeable to come out and show you the basics.


Yah I might need to get an electrician out to take a look. Everything else is fine, but this part just unsure. However, this is how the previous owner rand the boat for many years.

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