Flat batteries in new campervan.

Solar panel should keep leisure battery topped up (and starter battery if it has a split charge controller). Is the van stored under cover or left in deep shade? If not, it needs to go back to the dealer to check. Your solar panel needs to be able to keep pace with the discharge caused by your alarm - do you know the wattage of the solar panel?

If the van is parked on your drive, can you not plug it in to your domestic electricity supply every few days/week to keep the batteries charged?

I'd have thought that the solar panel should be capable to charging both batteries as Bill says ... 

But not if it’s parked in the shade as Bill says…

I suspect its a process of elimination. Firstly I would also ask the same question as TW about plugging it in at home? However even that might not help if the 230v only charges the leisure battery? Can you check if the solar charger is charging both batteries? If it is you could check the percentage charge going to the cab battery. Sometimes this is set as low as 10% which in current daylight hours and not so good weather might not be enough, especially as you have an alarm and tracker linked to the cab battery. If, whilst on 230v, it only charges the leisure battery you could think about fitting something like a Battery Master which will push any excess charge through to the cab battery.  Hope you get it sorted.

David

Solar(relating to the sun) panel-yup spot on Tinny it needs the sun for sure👍🏻
Shade-sheltered from the sun-yup spot on again it won’t be charged for sure👍🏻

Obviously  .... 🙄

Depends how many gloomy days we get. We had a very gloomy November and my 120w solar panel did not keep pace with the discharge rate. I ended up pluging into the house mains.

peedee

We have 160w of solar and so far that has kept pace with the discharge rate. Even last winter in a really dull period, when several were posting on here of problems. However, it is kept in a very open storage compound. No nearby buildings or trees to obstruct the light.

Trees do shade my parked vehicle but this time of year they have little effect on the availability of light. Pehaps I need to clean my panel. I have just jet washed the sides after a dirty road trip away but not yet tackled the roof.

peedee