Over the top prices

About 3 grand as a finger in the air jobbie

Have you heard rumours or just starting one Michael 

Contact someone like CAk Tanks they should be able to help as they sell just about everything needed  then plus the cost of fitting, ,but then how long will it take to get any sort of return on your "investment"hence why we would never go down that route unless the LV it was all installed in was to be a very long time ownership

Just based on experience and reading some other forums.

Solar Panel £400-£500

Lithium Batteries £1,200+

Gaslow £400-£600 (1 or 2 bottle set up)

Inverter £300-£1000 (depending on make, size etc.)

These are fitted indicative costs, may be bale to save a few quid fitting yourself ET.  Of course you save a hell of an amount on £5 a night sites to recoup the initial outlay

I am sure someone can get things cheaper and maybe a shareholders discount on certain refillable gas bottles though but at least its a start...

Don't have the cost for everything Merve suggested but we did do the gas refill and the solar panel on the MH. Never did recoup the cost though before we sold the van  you have to use it a lot and always go off grid to make it worth while.

Edit

These are fitted indicative costs, may be bale to save a few quid fitting yourself ET. Of course you save a hell of an amount on £5 a night sites to recoup the initial outlay.

However they are not always where you would like to be and if you have a MH not always suitable as they are on grass.

It was a tongue in cheek comment TG hence the smiley and like you said probably never going to recoup the costs but it gives you choice esp in a MH abroad using aires etc...

Our 100w solar panel and a few fittings for it came in at a little over £100, this was a DIY job plus the van was already geared up for a panel. Offset that against five years worth of sites (some EHU some not) it has given us the freedom of choice. There are still people who don't have SPs but who go off grid, you don't need a lot of expensive equipment.

Apologies to the OP as I've just re-read it and they need electrics. 

That's certainly why we are having solar panels and refillable gas fitted to the MH we are purchasing. I think it very unlikely we will recoup the cost outlay. However, it will give us a lot more choice.

A lot of new vans now come with a solar panel fitted as standard.  We’ve used CL’s as cheap as £5/night. 

What about Ribchester?  Commercial site, within walking distance of Ribchester, with shops, museum, river and in the middle of lots of footpaths for walking.  Dale Hey Farm

Stayed there for 4 nights last July, when we were having new CH put in, and liked it.  £18 per night, site has quite extensive woodland for dog walking too.  Our cat also liked it there