Adding an extra B2b?

[steven2002]

I have a pilote pvc with 320 ah lithium.the van is fitted with a dolphin booster 12/25 which runs the compressor fridge and 25ah to the leisure battery.
25a is not enough charge for the driving I am doing so need to up the charging rate.
Can I fit another B2b into the system 40a probably enough depending on the alternator output.
I have a sterling 60a b2b but I don't have any where to put it with god enough ventilation so I need something smaller.
One solar panel on roof and not much room fore more so B2b is priority.
Thanks.steven.

 

[paddymcc]

Certainly Votronic say that theirs can be doubled up in parallel. I imagine your alternator could cope fine with the 50A? Not sure but I think only the bigger Votronic units have an integral fan so with a smaller one you will have to think about airflow) ventilation.

 

[steven2002]

Certainly Votronic say that theirs can be doubled up in parallel. I imagine your alternator could cope fine with the 50A? Not sure but I think only the bigger Votronic units have an integral fan so with a smaller one you will have to think about airflow) ventilation.

I had read before about doubling up chargers.
Would there be any issue using two different model/make/size of charger.or is it just more power going to the battery.
Thanks.

 

[BillandHelen]

We have 2 30amp Votronic b2bs charging our 2x100amp NDS lithium, works a treat and they are very small units.

 

[paddymcc]

I had read before about doubling up chargers.
Would there be any issue using two different model/make/size of charger.or is it just more power going to the battery.
Thanks.

I don't know but I suspect it wouldn't matter - not really different to having B2B and solar controller both supplying the battery on a sunny day whilst driving

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[steven2002]

Thanks folks, maybe will get a look at the votronic ones.
Thanks everyone.

 

[Guigsy]

Votronic 30A is small and the stats suggest it's very efficient. It has a fan if it does get warm.

I've got one, but I've not yet fitted it. My factory fit EBL seems to be giving me 15-20A when the engine is running. Between that and my relatively small 175w solar panel, my lithium battery has stayed topped up after a week of grid. I guess we're actually pretty light users. Might need to fit the Votronic this autumn though when there's less sun and we go touring for a few weeks.

 

[BillandHelen]

Votronic 30A is small and the stats suggest it's very efficient. It has a fan if it does get warm.

I've got one, but I've not yet fitted it. My factory fit EBL seems to be giving me 15-20A when the engine is running. Between that and my relatively small 175w solar panel,

After 5 weeks in France, lots off grid we have found our 2x30amp votronics invaluable. We only have room on the roof for a 120w panel and it’s coped well if we are careful.
However when using the lithium to power the induction hob, coffee machine, hairdryer aircon etc we could use 70/80 amps a day! Topped up by the b2b when moving on the next day.

 

[Guigsy]

After 5 weeks in France, lots off grid we have found our 2x30amp votronics invaluable. We only have room on the roof for a 120w panel and it’s coped well if we are careful.
However when using the lithium to power the induction hob, coffee machine, hairdryer aircon etc we could use 70/80 amps a day! Topped up by the b2b when moving on the next day.

I've an odd user. We carry a couple of laptop, tablets, phones, various batteries, drone and other gizmos. But they're all relatively low power and charge on USB C (at 30w with a 12v supply). Gas hob, gas oven, 3 way fridge, mocka pot for coffee. Don't have a need for an inverter.

If we're still remote working from the van in the winter, I might need more juice. But at the moment my 280Ah lithium is way bigger than it needs to be. And I'm not wanting for generation either.

 

[steven2002]

My compressor fridge seems to be the main pretty constant drain.
A good warm sunny day the solar just about breaks even with the fridge running.thanks.

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[the1andonly]

I also have the Votronics 30A b2b, bought on the basis is is very small has an integral fan and if required a second is easily added. It also is small enough to fit in a space under the floor next to the CBE 300 unit.