Split charger (1 Viewer)

Andrewg55

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I have just purchased my Motorhome. It has a solar panel with a EP Solar duo battery controller which is hooked up to the Leisure battery. I want to keep the engine battery topped up. Do I connect the battery "2" terminal on the controller to the battery or purchase a seperate battery splitter? Can anyone advise me on this and easiest way to wire up?
 

Lenny HB

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:welco:
Normally on a duo controller the second output is connected to the starter battery.

Which controller is it? A photo would help.
 
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Andrewg55

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Terminal 1 and solar panel are connected
 

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Lenny HB

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Yes that one you can do it with.
You can change the balance of charge between the two batteries normal setting is 90% to leisure battery & 10% to starter battery.
 
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Andrewg55

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Thanks for the advice. Now for the stupid bit.......How?

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Apr 27, 2016
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Can anyone advise me on this and easiest way to wire up?
Depends where the solar controller is located. If it's near the distribution/fusebox, there will be a substantial wire from the starter battery to one of the terminals. You could wire the trickle-charge output to that wire. Easier than running a new wire all the way to the starter battery.
 
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Andrewg55

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Solar controller is in the cupboard above the distribution box, so that's not a problem. Thinking about adding a

MT-1 Remote Meter. Good idea?​

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Sapper520

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Jan 22, 2020
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Same as mine……70 / 30 split in favour of the leisure batteries. Works well for us. (y)


On the photo you will see ‘L’ and ‘E’.

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Lenny HB

LIFE MEMBER
Oct 18, 2007
54,178
153,060
On the coast in West Sussex
Funster No
658
MH
Hymer B678 DL
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Since 2008 & many years tugging
Solar controller is in the cupboard above the distribution box, so that's not a problem. Thinking about adding a

MT-1 Remote Meter. Good idea?​

Not important what the solar is doing its what the batteries are doing that is important.
Better to put your money towards a battery monitor like the Victron Smart Shunt or BMV 712.
 

Sapper520

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Jan 22, 2020
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Not important what the solar is doing its what the batteries are doing that is important.
Better to put your money towards a battery monitor like the Victron Smart Shunt or BMV 712.

I think in the menu it tells you how your batteries are performing…..I might be wrong, but it says in the manual the unit monitors battery performance. :unsure:
 
Apr 27, 2016
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In some applications, the solar is the only method of charging, so the solar controller can keep track of the amps going into and out of the battery. However in a motorhome, the battery is also charged by the mains charger and the alternator, so that method doesn't work.

A proper battery monitor will have a sensing device right on the terminal of the battery, so it can monitor everything going in or out. Usually it's a shunt or sense resistor, which sends amps data to the monitor. Also measures voltage.
 

Lenny HB

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Oct 18, 2007
54,178
153,060
On the coast in West Sussex
Funster No
658
MH
Hymer B678 DL
Exp
Since 2008 & many years tugging
I think in the menu it tells you how your batteries are performing…..I might be wrong, but it says in the manual the unit monitors battery performance. :unsure:
Only monitors the voltage which is only a rough guide and will be useless when it's daylight as it will see the charging voltage.

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