How would i hook up an inverter on a pontoon boat?

did i have to have to batteries? i want to put an 5000 watt inverter. i am going to be hooking up lights for bowfishing on the front. if i have to have 2 batteries how would i wire it.How would i hook up an inverter on a pontoon boat?
How much lighting are you planning on? And why are you using 120 VAC? You can use 12 volt flood lights which are cheaper and easier. A 5kw voltage inverter will suck both of those those batteries dead in about 20 minutes! Most in that size draw 300 amps with 12 vdc. You'd be better of getting a Honda Generator. I'd go with 12volt dc lights rather than ac lighting.