Comedian wrote:Joeblake wrote:Comedian wrote:
Can you tell me how many KW is required for a full charge of your battery from flat?
I think kilowatt
Hours would be more appropriate.
Joe
Yes, and then we need power station efficiency figures before we can say for sure about this.
I remember reading an article a while back that it was approximately 1kg of co2 per kw hour for an average Australian power station.
Not in every instance. For example, (sorry to keep harping on it) but I've got photovoltaic panels on the roof of my house, so in most circumstances where I need to recharge the battery(ies) in a hurry, rather than use the PVs on the trike, I plug an ordinary battery charger into the domestic circuit and use the solar energy in that way.
Of course, not everybody has rooftop PVs, so this won't apply to everybody.
Other factors can apply as well, such as whether the e-bike has the ability to harvest energy via, say, regenerative braking, which is in effect using the same electricity twice, hence it should cut the carbon generated in half.
So I suppose my underlying point is it's not very easy to determine the carbon footprint of an e-bike, it would seem to be much simpler with a petroleum fuelled machine. (Unless you've got a diesel which will run on biofuel, recycled chip oil etc etc.)
Too many factors to make a hard decision either way.
I was interested to see that figure of 3.3 l/km for the 50 cc scooter. My 650 BMW gets (according to the manual) 3.3 l/km and in real life just a tad under 4 l/km. Man that must be a VERY inefficient engine on that scoot.
Joe
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