Invertor to charge battery

It would be better to run the engine. You may just end up with 2 dead batteries.

Hows the Trolling Troll ?

You can do what you suggest but its pretty inefficent.

I actually do that but in a more effective way.

I often carry an SLA 18 AH

I use one of those cheap $49 laptop chargers and connect it reverse way around.

I.E. I connect its 15V output lead to the battery to be charged.

This process is much more efficent and easy to live with and no 240vac is generated.

Note - A resistor is needed in the output lead to prevent a flat battery drawing to much current and blowing the fuse and this depends on you devices output current (usually 3-6amp)

We have vegie burgers out the back and a free BBQ today so can't work out or remember value just now - but can do if go down that path.

Robin Miller

You might as well keep the two batteries connected all the time to spread the workload because the invertor will burn up heat losses pretty quick plus heat losses in the battery getting charged. My mate used to run his fridge over night from the cranker. Anotherr battery in the circuit would give a bit more security. I would not recomend it but suggest having an auto auxillary controller that wont let the cranker run down and will start the recharging of the auxillary on lower amps and build up to full amps as the aux fills up. There is a good article on this web site that deserves a read by every one who has a battery issue.

Owen