Amazing what can now be done to help save our planet…
As it happens, many of the huge draglines, face shovels and coal cutters are electrically fed by 6600 volt cables. There’s lots of diesel power though I agree.
I think diesel power has become so efficient, and electricity so expensive, over the past 20 years or so that diesel is outperforming electric power.Correct, but in recent years we have seen a tread of customers replacing electric rope shovels with diesel hydraulic excavators / shovels due to their flexibility. The 2 main mines where I work produce over 110 million tons of coal a year, but not 1 electric machine in sight.
Could it be a case of misguided re-badging of an indoor mini digger as a ‘Zero emissions’ machine? This can only really be virtue signalling because there is absolutely no point h as bing a zero emissions excavator. Why? In the grand scheme of things these are at or near the group of vehicles with the lowest total emissions, they add only a tiny fraction of total diesel emissions even in the busiest cities. It’s like saying we’ll change all the classic vehicles to battery power.I've seen these advertised for working inside buildings where you don't want the noise or exhaust from an engine but in most situations you just can't store sufficient power to make the sums add up.
The smallest diesel JCB mini digger has a 9kW engine and the electric digger has a battery of just less than 20kW if you go for the biggest battery. I've no idea what the power requirements are when you are digging but let's assume 80% of the available power is used for a six hour day so the diesel digger would consume 43.2kWh of power. This is more than double the capacity of the electric digger i.e. it would last just less than three hours at this work rate.
I'm sure that JCB have done their sums but I think you would have to be selective on the type of job it was put to work on for it to make sense.