Using a 100 leisure battery and Jackery Exporer 1000

[Ayjay]

Help please.
My leisure power setup comprises a Renogy 100Ah Smart Battery with a Ctek D250SE Charger and I've also got a Jackery Explorer 1000V2 which they say has a capacity of !070W.
Assuming and ambient temperature of, say, 20°C and that both the Renogy and Jackery are fully charged when we park up and I plug the EHU into the Jackery when we arrive (to trickle charge the Renogy), how long are we likely to be able to power our Dometic CRX50 fridge along with maybe a couple of hours of lighting per day. I understand that the fridge uses about 40W and the lights about 12W in total when fully on although, in practice, they are likely to be dimmed. Apart from anything else, it's the difference between the Ah spec stated for the battery and the Wh spec for the Jackery that's got me confused. I'm purposely ignoring the fact that I've got a 160W solar panel on the poptop as well as a 200W folding solar pane(s) as I'd rather not rely on the sun coming out. Also, I don't particularly want to run the engine just to charge the battery.
So is it possible to say roughly how long that piece of string is likely to be please?

 

[Ayjay]

PS. I know that I could just trial it but with temperatures the way they are at the moment, I doubt if the fridge will need to work particularly hard to keep it's inside.cold so any test probably wouldn't be representative of late spring/ early summer use.

 

[TrevorK]

I did some similar calculations before buying a Bluetti last year.

Your Renology and the Jackery will both supply around 1000wh each, which would run the fridge and lights for 2000/52 = 38 hours.
However 1) fridge motor will only run around 25% of the time 2) you suggest that you will be on EHU when parked up.

Based on my calculations for fridge and lights (and using my 100ah AGM leisure battery and 768wh Bluetti), I managed 4 nights in the New Forest without EHU or solar and a few watts to spare.

Hope this helps.

 

[Ayjay]

@TrevorK.

you suggest that you will be on EHU when parked up.

Apologies but I could have been a bit clearer - we will NOT using campsite mains via EHU as the site that we're thinking about isn't equipped for it. My idea was to plug the the van EHU input into one of the Jackery DC 3 Pin sockets that we could just draw power from the leisure battery (for the fridge and lights) with it then being topped up by the Jackery. That said, I think you have answered my original question and thanks for that.

I'd also be grateful to anybody else who wants to chip on.

 

[Sackmycook]

This is something I have explored with my Jackery 500 , 100w Jackery folding panel and leisure battery. Although my battery is not Lithium. Plug the vans hook-up lead into the Jackery 500, plug in the solar panel to the jackery and sit back and relax.
I also have a fly lead so the solar panel can replenish the leisure battery directly via a solar controller.
I've not got as far as seeing how long the jackery would last as its sunshine
dependant

 

[TrevorK]

My idea was to plug the the van EHU input into one of the Jackery DC 3 Pin sockets that we could just draw power from the leisure battery (for the fridge and lights) with it then being topped up by the Jackery

I decided to go down this route when we were off-grid.

On day 2 I plugged Bluetti into EHU. The leisure battery charger drew about 330wh, so I ran for an hour (which topped up the AGM), and the same on day 3.

You can run the Renology down to lower %, and may find you can keep Jackery in reserve.

 

[Ayjay]

so I ran for an hour (which topped up the AGM), and the same on day 3

@TrevorK. Presumably you mean 'ran the engine for an hour'.

 

[TrevorK]

No - ran the Bluetti through the EHU for an hour

 

[Ayjay]

@TrevorK. Thanks - that's just the sort of assurance I need.