What Items do I need to install?

[Dee101]

I have 4-70ah lead acid batteries installed in parallel.
I recently purchased a Victron SmartShunt 500amp.
I’ll soon be installing 600w of solar panels, in parallel.
And of course I’ll be installing an mppt. A minimum of 50 is required?
However…I see that Regony have introduced the DCC50S, 12 volt 50 amp DC to DC battery charger with an inbuilt mppt.
I’m not at all electrically minded, but am I right in saying that the Regony unit does away with the need for the Victron SmartShunt?
And bearing in mind I have a 1995 Hymer B654, would these additions work correctly?
Dee

 

[cyberyacht]

Depending on the configuration of your array, it might be worth splitting into 2x300W in series to crank up the voltage a bit. It can then feed your batteries longer at each end of the day.

 

[Revolvor]

The Smartshunt is used to monitor the conditions of your leisure batteries, so still useful, whatever Solar controller you use. I also have a combined MPPT solar controller and B2B charger, but made by CTEK, rather than Renogy.

 

[Revolvor]

Depending on the configuration of your array, it might be worth splitting into 2x300W in series to crank up the voltage a bit. It can then feed your batteries longer at each end of the day.

Specs say maximum solar input voltage is 25volts, so need to keep them parallel.

 

[Guigsy]

I have 4-70ah lead acid batteries installed in parallel.
I recently purchased a Victron SmartShunt 500amp.
I’ll soon be installing 600w of solar panels, in parallel.
And of course I’ll be installing an mppt. A minimum of 50 is required?
However…I see that Regony have introduced the DCC50S, 12 volt 50 amp DC to DC battery charger with an inbuilt mppt.
I’m not at all electrically minded, but am I right in saying that the Regony unit does away with the need for the Victron SmartShunt?
And bearing in mind I have a 1995 Hymer B654, would these additions work correctly?
Dee

The Smart Shunt measures the current going in and out of the battery. It does this to estimate the level of charge.

I've had a quick look at the Renology DCC50S. It appears to have a combined DC charger and solar charger. It means you can plug the solar panel in, and the feed from the cab battery (and alternator) so you can recharge the batteries faster while you are driving. It's charge profiles will be based on the current voltage level of the battery array. It doesn't appear that it's got a shunt built in, so I don't think it knows the precise level of charge of the batteries. So the Smart Shunt will still be useful.

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[autorouter]

An MPPT controller will be able to measure the amps it is sending into the battery, but it won't be able to take account of the amps out of the battery, or amps in from the EHU or alternator. A SmartShunt on the battery negative terminal can account for all amps, in and out.

Specs say maximum solar input voltage is 25volts, so need to keep them parallel.

What panels are you getting? If they're not the smaller type (9 x 4, 36cells) then be careful of the 25V limit. Look at the Voc spec, and remember that's usually measured at 25deg C, and the voltage is higher as temperature falls. That 25V is a hard limit, not to be exceeded.