Old Mini Van to power and heat house.

HowlerMonkey

How about a toyota prius as a starting point?

xxChrisxx

But then you have to own a Prius.

HowlerMonkey

I just got back from the junkyard and there is one that is complete.

Engine and transmission are 600 bucks.

Wiring harness is 20 bucks.

Main ecu is 30 bucks.


That said, I think a diesel hybrid would be the way to go.

sophiecentaur

What use would a hybrid be? You don't want to be using up battery power to turn over the engine if it's not taking you anywhere.

wissy

I am going with propane because I already have propane and its cheap here, 2 cylinder liquid cooled 4 stroke making about 50 to 80 HP should be fine, the heat from the engine and alternators 12v and 120/220 volt, all tied into a system,

HowlerMonkey

Hybrid cars can generate a huge amount of electrical power.

Hybrid certified Toyota and Lexus master technician.

sophiecentaur

Yes but not at mains voltage AC, which is what we all really want in the home. The real reason for not using a motor car engine is the lack of accurate speed regulation and, in fact, getting the gearing / pulley system right for optimum engine speed / efficiency. This project is supposed to be competitive with the mains supply so it needs to be done right.
A car engine is designed for variable power / speed output, up to, say 100kW. A generating set needs to produce up to 10 - 20kW at a fixed speed. Two significant differences when you're talking about efficiency.

HowlerMonkey

NOTHING is competitive with the mains supply.

sophiecentaur

Correct if you live in town under normal circs. but other factors can tip the balance. Not that I think this proposal is actually viable but it could be a fun project, especially one for 'in your head'.
One thing that gives the mains an advantage for the consumer is that you're charged the same per unit, irrespective of the losses on the way to your house.