The 7,000 volt zap wouldn't be what killed them. As previously stated, it's very low current. It has to be something to do with connecting the Battery Charger to the vehicle, but beats me how or what.
Reading something from (I think) the ABC, it sounded more like there was a bit of unelecrtified fence run from the truck to a tree. I know some stock horses that won't go near a bit hot tape even if it's not hot so this is quite likely. I'm with you, I'm confused as to how it got electrified...
This is what is getting me (although it doesn't help that every time they talk about they change some of the details

)
They were in a "truck" (then reported as a semi-trailer & shown on the news as a drawing of a ute

), parked & ran a "cable" (but no idea what sort of cable - fence electrified / fencing wire / 240v extension cord

) from the (possibly electrified

) fence to the bull-bar to tie the horses to / keep the horses away from the shed

. At some later stage a "battery charger" was connected to the truck. Mum & daughter then came back, touched the cable & were both electrocuted. Dad arrived later & he also got a shock. Last night's news then also said that it showed the importance of having "safety switches" on all your power circuits

It sounds like the "battery charger" has somehow charged the entire truck, but how could it, unless they've actually somehow connected 240v direct to the battery

& what would a "safety switch" (presumably Earth Leakage

) do

None of it makes any sort of sense at all

The only thing we know for sure is that two people are dead, which is an undoubted tragedy
