Power for mobile catering - batteries versus generator?

[Flipflop]

Hi all,

I'm new here and have a pretty specific question. We've got a vintage ambulance we've converted to a coffee bar. There's a mains voltage hookup to a 3 way consumer unit which runs everything including a 12v charger which charges 2 x 110Ah batteries. Now, we're looking at a pitch where we wont have the luxury of hooking up and I was wondering if anyone had recommendations for a best approach?

We have some power-hungry-appliances (espresso machine @ 3kw, taps @ 2kw, filter machines (2 of) @ 1kw plus lights and speakers). They're not all drawing max load the time, like the espresso machine is a lot less after it's initial heat.

Anyway, what would be the pros/cons of getting a smallish generator (we can't be noisy at our pitch) to charge the batteries (I have 2 extra so a possible maximum of 4 @ 110Ah each) and an inverter?

Thought and suggestions welcome and appreciated!

 

[grantr37]

petrol gennys are expensive on fuel. diesel ones will wake the dead. if you wait a few years i'll have designed a silent nuclear powered genny that only costs a few pence an hour. but find your own ocean to dump the radioactive waste.

RTG generators have been in it for 60 years, they are super dangerous and the fuel for one will cost about £30 million to £50 million not to mention a licence from the home secretary and a 10 year wait, they are used to power space probes where they are on a one way trip to forever and won't be coming back to need disposal under a desert or mountain

 

[jeffthechef]

What about using a tesla module they kick out 15kva? I need min 10kva amp to run, but I need mostly to run fridges and security overnight when u don't want the noise. So would run generator when in full service. is there any possibility for this? plus could the generator recharge battery?
Yours hopefully
Jeff the chef
Aka Pie man