I have a honda gx390 4gpm @ 4000psi. Im trying to figure out a descent hot box. I would like to keep it 12v but not sure how the highlighted ottor will charge any battery...or shouldn't i just go 115v.
I personally would go with the 115 volt hot box and use a generator to power it. As for brands I would call Jerry and see what he has or Largo or Farley's. Those would be my top 3 choices personally.
Go 115v with a small genset as mentioned, this is give you the least amount of issues. Many guys have tried to go the 12v route and had nothing but problems trying to get things going. One lost job will equal the cost of a small genset and they are simple to run and do a good job keeping things at 115v
115V is the way to go. Amperage for the 12V burners can become problematic. With a small gen set, You will also gain power for other items like work lights etc...
I have a friend that has a few of the Ramteq skid units that were 12 volt systems. He converted them to 115v using a new GM alternator that goes on older cars, got the bracket for it, new pulley, belt and hasn't had any problems since. Total cost was under $150 for everything.
The GM alternator that most would use is a 10Si, there is also a 12Si. I have used the 10si without problems, but didn't like the limited amp's it put out. I upgraded to a delco remi 150 amp heavy truck alternator and enjoy more power.