Not sure if l really need it

I would think the money is better used for other things,i am sure you take your motor caravan out to keep "mobile"  even for short trips  if not away which would keep batteries charged ,which would,work out a lot cheaper that the cost of a solar panel

If you don’t go off grid, I’d not bother with an SP. 

 we don't do off grid so l am not sure if its worth the extra money

Could I ask why you never go off grid ?

I thought that was one of the benefits of a Motorhome - especially abroad.

Does your mains electric system keep your vehicle battery topped up?If not a solar panel could be connected to both batteries. An alternative if there is no charging of the vehicle battery is to fit a Battery Master which would probably be a lot cheaper than a solar panel.

David

My experience is that batteries that are trickle charged with an ‘intelligent’ charging system last considerably longer than those that are not. For that reason I’d always have a solar panel fitted, whatever my camping habits. At home or in storage a split charging system will keep both leisure and van battery in good condition without need for EHU. Also, if you’ve got Truma iNet fitted, you can turn gas heating on/off from wherever you happen to be if concerned about freezing at home/storage. Solar panel will enable you to run the blower in eco mode for a while and enable you to monitor battery voltage. 

 I agree, since we changed from a caravan 3 and a half years ago we have rarely used a site, 99% of the time abroad we use Aires, here a mixture of CL's, pub stops, THS etc. and if I were to just use sites and hook up to EHU etc. I would think I may as well stayed with my caravan.

As for the question of having a SP fitted like others say it would keep your batteries topped up and ready to go without having to hook up and solar power is free unlike the stuff that comes out of plugs.

I've got 120W worth on my MH split, IIRC, 80/20 to keep the batteries topped up. Originally it only charged the leisure battery but I linked in the vehicle one, saving me having to hook up a charger once a month. Additionally some of the most delightful places I've stopped have been "wild camping" on the banks of estuaries or rivers.

wouldn't you need to leave the gas on to do that. bit dangerous if left on it's own with gas on.

Probably a no-no in storage. 

 we don't do off grid so l am not sure if its worth the extra money

Could I ask why you never go off grid ?

I thought that was one of the benefits of a Motorhome - especially abroad.

 We had a MH for 6 years and never went off grid. We toured abroad twice a year for 2 - 3 months at a time but always stayed on sites.

Going off grid or using aires was the reason we moved to a MH, we didn't have a fixed SP but we did have and 80W briefcase type one. Never had the occasion to use it when away but we did use it at home to top up the batteries.