Dec 31st Closing Price, page-11

its usualy not tool but the big fixed machinery - for eg 2-3 years ago thre was a wave of complaint about massive increase in business energy costs for places like butchers and food storage fromt he peak price period spikes

i have a friend who now runs a queensland power company based on using dams at an old mine site to generate hydro power (dams are converted waste pits)

they flow water from 'head' (highest elevation dam) to lower dam to drive turbine and generate power during peak price periods - then overnight buy power back at 5c on the dollar off peak - use that power to pump the water back up to the head dam - rinse and repeat next day

very clever and very green solution to what would otherwise be close to unusable land

reason he came up with the idea is because of the massivand apparently widening gap between peak and offpeak demand/price

his solution was basically creating a large battery via an economic transmission system to 'store' offpeak power for peak periods