[Edd Beesley]

I think the Ampera has a setting to reduce it's draw down to 6 amps doesn't it?

 

[Edd Beesley]

With it set to 6 amps in a static caravan I would not be worried.

I mean, if it has an electric oven rather than gas then don't even think about it, it's fine. If it has electric heating, it's fine.

6 amps is vacuum cleaner or hair dryer category, and the ampera only takes a couple of hours to charge.

 

[Edd Beesley]

Hmm, My static has two 20A circuits (a main ring and an extra circuit with only two sockets) and a 6A lighting circuit.

So as long as the OP doesn't use an SES to BS1363 adapter he might be alright....