Victron Bluesolar mppt controller

[Jo662]

I’m a complete novice with motorhome electrics,so need some advice please.
I want to change to a Victron mppt controller and need some advice on which one to get.
I think the Victron bluesolar 75/15 would be the one as I only have a 150 solar panel at the moment.
That one has 1+ and 1- for leisure batteries, 1+ and 1- for solar panel and 1+ and 1- for load. Where would I connect the cab battery?

Amazon product ASIN B00IVHO8X4

 

[cmcardle75]

I’m a complete novice with motorhome electrics,so need some advice please.
I want to change to a Victron mppt controller and need some advice on which one to get.
I think the Victron bluesolar 75/15 would be the one as I only have a 150 solar panel at the moment.
That one has 1+ and 1- for leisure batteries, 1+ and 1- for solar panel and 1+ and 1- for load. Where would I connect the cab battery?

Amazon product ASIN B00IVHO8X4

It appears not to have the ability to charge the cab battery. You would need a different model, or a VanBitz Battery Master to keep that charged.

 

[Lenny HB]

For the cab battery you would need to fit a CBE CBS-2 split charge relay or a Batterymaster.
Alternatively you could fit a Votronic solar regulator they have an output for the cab battery, every bit as good as the Victron.

 

[cmcardle75]

It appears not to have the ability to charge the cab battery. You would need a different model, or a VanBitz Battery Master to keep that charged.

The Battery Master would have the advantage of also keeping the cab battery topped up on EHU, which might be a consideration if you plug in over winter.

 

[Vikdikdok]

Well, I had one fitted for both the engine and leisure batteries - I just joined cables from both eng & leisure together positive to positive / negative to negative out of the controller unit without any problems

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[cmcardle75]

Well, I had one fitted for both the engine and leisure batteries - I just joined cables from both eng & leisure together positive to positive / negative to negative out of the controller unit without any problems

You might get away with that as a solution during storage. Although if something goes wrong, you lose both batteries. No need to connect the negatives (they're already connected) and the positive jump lead needs fuses both ends. If you leave the batteries permanently connected, you just end up with one shared battery without the benefits of separation.

 

[Jo662]

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[Jo662]

It appears not to have the ability to charge the cab battery. You would need a different model, or a VanBitz Battery Master to keep that charged.

For the cab battery you would need to fit a CBE CBS-2 split charge relay or a Batterymaster.
Alternatively you could fit a Votronic solar regulator they have an output for the cab battery, every bit as good as the Victron.

The Battery Master would have the advantage of also keeping the cab battery topped up on EHU, which might be a consideration if you plug in over winter.

Well, I had one fitted for both the engine and leisure batteries - I just joined cables from both eng & leisure together positive to positive / negative to negative out of the controller unit without any problems

You might get away with that as a solution during storage. Although if something goes wrong, you lose both batteries. No need to connect the negatives (they're already connected) and the positive jump lead needs fuses both ends. If you leave the batteries permanently connected, you just end up with one shared battery without the benefits of separation.

Thank you for all your replies,very helpful

 

[autorouter]

There's two main reasons why it's not a good idea to directly wire the leisure battery and starter battery together.

First, if you inadvertently run the leisure battery until it is flat, the starter battery will be flat too.
Second, when you run the starter motor, it takes a massive current, for a few seconds. If connected, the leisure battery will try to contribute to this massive current. The wire from starter battery to starter motor is very thick, and able to handle the current. But the chances are the wire from the leisure battery will be thin, and will get very hot. If there's a proper fuse in the wire, usually 30 to 50 amps, it will blow.

Electronic devices like a BatteryMaster or dual-output solar controller can easily avoid these problems with inbuilt diodes (electrical one-way valves) and current limiters.

The Victron 75-15 has many market applications - for motorhomes the 'Load' terminals are not used.

 

[dosser]

I fitted this one to mine connected to both engine (trickle charge) and leisure battery my panel is 120w does up to 165w panel.
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[dosser]

I’m a complete novice with motorhome electrics,so need some advice please.
I want to change to a Victron mppt controller and need some advice on which one to get.
I think the Victron bluesolar 75/15 would be the one as I only have a 150 solar panel at the moment.
That one has 1+ and 1- for leisure batteries, 1+ and 1- for solar panel and 1+ and 1- for load. Where would I connect the cab battery?

Amazon product ASIN B00IVHO8X4

I fitted this one to my van connected to both engine (trickle charge) and leisure battery my panel is 120w does up to 165w panel. Bought my panel from here as well.
<Broken link removed>