Dual output regulator

[Petros]

Hi, i want to fit a dual control solar panel regulator, can anyone tell me the correct size of cable to use and what size inline fuse. I am led to believe the fitting is fairly straight forward, one wire to the vehicle battery and one to earth!

 

[autorouter]

For safety, anything thicker than 2 mm2 will be fine. For efficiency, to avoid too much wasted power due to voltage drop, I'd go for 6 mm2. The fuse should be a bit larger than the maximum working amps. So if the controller output is 20 amps, a 25A or 30A fuse is OK.

In a motorhome, the negatives of both batteries are connected together by a fairly substantial connection. This means that only one negative connection to the solar controller is required. No benefit in running two negative wires, but no harm either.

 

[Petros]

Thanks for that, very useful

 

[Stealaway]

I have this kit wired with 4mm cable.
The biggest problem for me was getting the wires across to the starter battery.

10A 20A Dual Battery Solar Charge Controller Regulator 12V 24V Caravans MPPT | eBay

With DC load output, it is widely used in off-grid solar power generation system. MPPT 25A with Optional Bluetooth function Application for camper,caravan,self-contained solar systems,for boat. 20A: 12V:240W, 24V: 480W.

www.ebay.co.uk

And a 20A one of these fitted before the controller so can switch off the solar panels

<Broken link removed>

 

[jongood]

While we re on this, my hab batteries are 12volt and my chassis batteries are 24v, can anyone think of an easy way to get a cable to charge the chassis batteries from the regs that are already charging the hab batteries? Could be one you you martin funflair ?

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[funflair]

While we re on this, my hab batteries are 12volt and my chassis batteries are 24v, can anyone think of an easy way to get a cable to charge the chassis batteries from the regs that are already charging the hab batteries? Could be one you you martin funflair ?

Stick 2 panels in series and run a 24v regulator then charge your 12v from the 24v.

We can do that next week Jon.

Sterling BB241235 'Pro Batt Ultra' Battery-To-Battery Charger - 24V/12V 35A

Sterling Pro Batt Ultra multi-stage BB241235 Battery to Battery charger. Euro 5/6 smart alternator & regen braking compatible. Ideal for 24V horseboxes.

www.12voltplanet.co.uk

 

[jongood]

Stick 2 panels in series and run a 24v regulator then charge your 12v from the 24v.

We can do that next week Jon.

Sterling BB241235 'Pro Batt Ultra' Battery-To-Battery Charger - 24V/12V 35A

Sterling Pro Batt Ultra multi-stage BB241235 Battery to Battery charger. Euro 5/6 smart alternator & regen braking compatible. Ideal for 24V horseboxes.

www.12voltplanet.co.uk

I said easy Martin not £366, how will I get that past the management?

 

[funflair]

I said easy Martin not £366, how will I get that past the management?

Switch your inverter on and charge with 24v charger

 

[autorouter]

Sterling 12V to 24V battery maintainer? A lot less than £366.

Battery Maintainer

Instruction Manual PDF Product Information PDF Battery maintainer / charger includes 1m of cable.Save money on batteries and stop them from being destroyed by discharging. A flat battery means you need an expensive replacement.The auxiliary battery charger maintainer is simple to install and is...

sterling-power.com

 

[jongood]

Sterling 12V to 24V battery maintainer? A lot less than £366.

Battery Maintainer

Instruction Manual PDF Product Information PDF Battery maintainer / charger includes 1m of cable.Save money on batteries and stop them from being destroyed by discharging. A flat battery means you need an expensive replacement.The auxiliary battery charger maintainer is simple to install and is...

sterling-power.com

That looks ideal. Thanks

Jon

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