On another forum someone did use their microwave off a bank of 110ah batteries. You need to use a very big inverter due to the start up wattage of most microwaves. Also drains battery very quick. I think he gave up eventually even though he had several solar panels for recharging. Better to use a small generator.
You have a outfit as a "Frock". I don't think any of us have heard of that type of RV? Do you have a link to it so we can see the RV? Where are you based as all those fireplace reviews are for items in the USA and would be very expensive to import into England?
Just remembered that about 3 years ago we bought an small air awning that does not have the Kampa name on it, but was a grey import and is identical to the same 220 Kampa. Needless to say after only 2 uses it developed a small split about an inch long in the front. No ways would it have happened due to perhaps carelessness in packing by us. We still continue to use it as we only use it during the winter. So only used 4 times total of a maximum of about 2 weeks.
We were there in March/April last year and rules were ignored. Generally when coming up to a green light you slowed down and checked to make sure it was safe to cross and that a taxi was not going to wipe you out! No such thing as speed limits or lane discipline.