-
Unfortunately you didn't answer the question. I just wanted to know if a battery requires 0.5kwH or whatever to charge from your home supply and that costs 2p or whatever, how far you'd need to ride to generate the same money's worth of electricity. Nothing to do with cost of either device - clearly the Li-Ions have leaked into your food supply :P
The convenience of my dynamo power is worth far more to me than £s. For that, you'd have to ask "how expensive would a dynamo setup need to be before I wouldn't use one?".
hippy-
you'd have to ask "how expensive would a dynamo setup need to be before I wouldn't use one?
I don't know, but I reckon that if you keep riding all day every day until 2035 you can save 3p!
:) -
The convenience of my dynamo power is worth far more to me than £s.
Not having my front light suddenly run out of juice again during a fast descent in the pitch dark at 4am is worth quite a bit to me. Did not enjoy that.
frank9755
Brommers
OK.
On the TCR I was typically using about half of a 10Ah battery per day for my lights. That was basically for a slow 300km ride each day.
A bit of googling tells me that it takes about .25kWh to recharge a 5Ah batttery (actual leccy needed taking into account losses, not theoretical 100% efficiency).
Electricity costs about 12p per kWh, depending on your tariff (obviously if you do it in a hotel it is free to you), or 3p for a day's lighting.
Dynamos cost lots of money. SJS says a Son Delux hub costs £180.
Assume your lights cost the same whether they are battery or dynamo (mine are actually really cheap but ignore that). Also ignore the cost of all the wire and other bits of crap that you need for a dyanmo setup. And value all the time that it takes you to faff around setting it up, and solder it and all that, at £0 per hour.
In that case, to recoup the cost of your dynamo hub, you would need to do 33.33 x 180 rides of 300km.
That is 6,000 rides or 16.4 years, riding 300km every day - or 1.8 million km in total.
Do dynamo hubs last that long?