Gday Goose,
What an interesting idea, I have not heard of this being done or is it possible, I have a single Enphase battery on my house solar system, it's a 1.2 Kw unit, I have 16 panels totaling 4.5 Kw, We initially had 8 panels (1.5 Kw) when were selling it for 60c / kw/hr. we added new 8 panels (2kw) and the battery after the input tariff stopped.
Even with home consumption, washer, dish washer ,TV sometimes aircon and cooking in the summer it is usually fully charged by 10.30 am, It usually still has power until 9.30 pm. Winter is a bit less especially cloudy days, We have credits on our power in summer and minimal costs in winter if the weather is clear, overall we have had free power each year since we added the solar and battery. The usage would be much less in a van but you would have a lot less solar.
Not sure what the status would be in a motorhome or van would be, There is an inverter as well almost the same physical size as the battery.
Have fun with this idea and let us know how it goes if you go ahead. More technical advice than I can give is probably needed eh.
regards Oxliegh

PS try to post this in the techies corner in the forum, there might be more advice there.

I doubt it. They will be built for a static location, roads will dismantle it. The modular system will be a very inefficient use of space. Even though lithium batteries are lighter than lead acid, you still need to keep the weight as low as possible for safety & as centred as possible in the vehicle. If the actual battery has a mass less that 1.5kg per litre volume of battery you need ask questions.

Goose wrote:

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HI I am hoping that one of you who reads this has some knowledge on home storage batteries, I have been looking at enphase batteries and power wall ect ect, can they be used in mobile homes,have you or someone you know already done this and if not why? as my friend liked to say where there is a will there is away.   Will always had good sense of humour, anyway would love to hear back from you.  Thanks.

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 My van has 1650 watts Solar and 540ah Lithium through 5kw inverter.No gas at all in van,and batteries run microwave,electric frypan, toaster, slowcooker, air fryer,electric hot water jug and my 2.5kw domestic AC any time I want.NEVER had to connect to 240 supply,or use the generator that I bought in a moment of madness! Cheers

Gday Brenda and Alan,

We were one of the early battery systems, after lots of research with the small household numbers, admittedly in a large house, we realised that to have more battery storage we would be only using a small amount of the battery power and probably putting more into the grid, the input tariff was not worth the effort to add more expensive equipment the pay back for the battery system, and panels, was almost 3 years at the start but as the power prices went up it came back to about 2.25 years.

It looks like the government is going to charge us to put power back into the grid anyway, With more batteries the pay back would spread out to not be viable. If we suddenly have an extra 4-5 kids we have the option of adding more batts. That's not about to happen as we are both retired now.

As I said on the average over the year we dont pay for power now and some times there is a slight credit and if the input tariff goes up, which I doubt, it could be much more credit.

Looking at the expert replies here there are much more viable ways to power the vans. The only batteries in our van are the ones in the LED lights and torches, My Jump starter battery has a small inverter built in that can run the flat screen TV with a dvd player built in for more than a long movie if needed but with the peace of the bush it rarely gets used. Caravan parks and gas supply most of our energy.

Stay safe and we hope to be able to catch up on the road sometime.

Ian and Lizzy