Charging leisure battery from portable solar panels

nomislotsirb

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I don't believe there is a specific thread on this topic, although I believe some Forum members have a similar setup. @Dellmassive?

We have a dayvan with a 115Ah AGM leisure battery which typically lasts 2 days, powering compressor fridge, lights, charging devices. However, we usually opt for EHU.

However, in late July my wife and son will be staying for 8 days on a TaeKwon Do camp where there is no EHU on the field they are staying in. I'm looking to avoid them being forced to have to go for a drive (removing awning, windscreen cover, swivelling chairs etc.) for the sole purpose of having to charge up the battery.

I am looking to replace the leisure battery with Lithium, on the basis that even if I opt for a 105Ah, this will effectively double the use. A 230Ah seat base would be ideal however.

Additionally, I'm looking at the option of using portable solar panels to top up. I'm not keen on having fixed to the roof, simply due to the limited use, and also the flexibility of portable units means they can be paired to power bank. I appreciate this can not be absolutely relied on, but I'm working on the basis that if the weather isn't great, having to go for a drive isn't such a bad thing anyway.

So, my questions are:
  1. Has anyone done this?
  2. Would 100W be generally reasonable (I appreciate this is very much dependent on weather) - this size would fit on windscreen nicely, whereas I believe anything larger would need to be sat on the floor
  3. I have a Jackery power station, so would most likely opt for the same for the solar panels
  4. I currently have a Victron Orion-Tr Smart 12|12 -18 Isolated DC-DC charger - would this need to be upgraded when adding a solar charger
  5. Can the connectors be left under the seat base to plug the cables from the portable solar panel into?
One bonus question ... the campsite does have electric car chargers. I understand it is possible to get a cable that allows you to charge the leisure battery, albeit at great expense (https://www.bobilvans.co.uk/product-page/hook-up-to-ev-charger-adaptor). This still would require 'packing down' just to travel 100m, but has anyone done this?

Many thanks in advance, and apologies for it all being a bit waffly?!
 
I don't believe there is a specific thread on this topic, although I believe some Forum members have a similar setup. @Dellmassive?

We have a dayvan with a 115Ah AGM leisure battery which typically lasts 2 days, powering compressor fridge, lights, charging devices. However, we usually opt for EHU.

However, in late July my wife and son will be staying for 8 days on a TaeKwon Do camp where there is no EHU on the field they are staying in. I'm looking to avoid them being forced to have to go for a drive (removing awning, windscreen cover, swivelling chairs etc.) for the sole purpose of having to charge up the battery.

I am looking to replace the leisure battery with Lithium, on the basis that even if I opt for a 105Ah, this will effectively double the use. A 230Ah seat base would be ideal however.

Additionally, I'm looking at the option of using portable solar panels to top up. I'm not keen on having fixed to the roof, simply due to the limited use, and also the flexibility of portable units means they can be paired to power bank. I appreciate this can not be absolutely relied on, but I'm working on the basis that if the weather isn't great, having to go for a drive isn't such a bad thing anyway.

So, my questions are:
  1. Has anyone done this?
  2. Would 100W be generally reasonable (I appreciate this is very much dependent on weather) - this size would fit on windscreen nicely, whereas I believe anything larger would need to be sat on the floor
  3. I have a Jackery power station, so would most likely opt for the same for the solar panels
  4. I currently have a Victron Orion-Tr Smart 12|12 -18 Isolated DC-DC charger - would this need to be upgraded when adding a solar charger
  5. Can the connectors be left under the seat base to plug the cables from the portable solar panel into?
One bonus question ... the campsite does have electric car chargers. I understand it is possible to get a cable that allows you to charge the leisure battery, albeit at great expense (https://www.bobilvans.co.uk/product-page/hook-up-to-ev-charger-adaptor). This still would require 'packing down' just to travel 100m, but has anyone done this?

Many thanks in advance, and apologies for it all being a bit waffly?!
Yes you can do all of the above,

I would say the 100 watt panel will be an absolute minimum, I would be more inclined to go for a 200 watt panel... With a victron mppt solar controller.

As for the size of lithium battery the 105 amp hour we'll double your runtime versus your AGM, but if you can go up to the 230 am power that will be much better.

Your dc dc charger is already suitable for lithium so you're good to go there.

As for mains hookup you might be better just getting the viktron 12 volt hookup charger anywhere between 5 and 15 amp should do.
 
More info over here


 
I have the same set-up.

I have a Jackery 500 as a back up in the van. The Jackery Solar Saga 100 folding panel can charge this and also my Agm leisure battery via a fly lead connected to a Victron Blue Solar Controller.
I pop my folding panel on the dash at home when the van is sat. This keeps the leisure and starter batteries topped up.....
All works pretty well and no drama, fitted by me with no electrickery experience....
 
@Dellmassive & @Sackmycook many thanks for your really useful replies. It's really reassuring.

I've since also come across the below YouTube videos which were helpful, but also raised further questions.


Are there any disadvantages/losses overconnecting the solar panels to the power bank which in turn connects to the hook up point,opposed to connecting direct to the leisure battery? One advantage of this setup, I presume, would be that, on the assumption there is morepower generated from the solar than the output, it is also keeping the power bank topped up.

@Sackmycook, what fly lead have you used please? One of the videos suggested doctoring a cable from Amazon that is currently out of stock (GELRHONR DC 8mm Splitter Adapter Cable, 14AWG DC7909 Solar Combiner Cable, 8mm Y Splitter Solar Panel for Generator Portable Power Station-1M/3.2Ft : Amazon.co.uk: Business, Industry & Science).
 
One of these I think.....

Just cut off the end to connect to the solar controller....
 
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