Electrical Questions? Ask an Electrician Online.
Hi,I'm Mike G and I'll be assisting you. The first thing would be to install a panel with a power inlet to connect to shore power or generator power. A 15KVA load would be on the 240V power and should also have a 120/240V generator. The size of the inlet should be sized to the expected power source.
15Kva /240V=62.5 Amps. Depending on the constant load it would not exceed that. You would need a generator sized for that load as a minimum. As far as the fuel source, you should be able to find one online.