First commute on e-mtb

[albion]

But you were adding to the 'Mustang obviously meant watt hours. Wh is Amps multiplied by Volts. So the 640wh battery could well be 36V 17.7A or even more likely a 48V 13.33A.

Your variation of Amps comes from Amps as in Power, not Amps as in capacity. It almost never ever gets used in this context, it being quite irrelevant, just like this thread is now.

 

[Dadam]

Amps are Amps (short for amperes) and are a measure of electrical current. Nothing else.

"Wh" is amps multiplied by volts multiplied by hours!

What you're missing is that the "48V, 13.33A battery" you mention will be a 13.33 amp-hour (Ah) battery. This means it has the capacity to supply that current for 1 hour, or half that current for two hours, etc.

Amp-hours have been quoted for years as a measure of battery capacity, or milliamp-hours for smaller batteries. I've got a bunch of rechargeable AAs that are 2000mAH.

 

[roubaixtuesday]

Your variation of Amps comes from Amps as in Power, not Amps as in capacity. It almost never ever gets used in this context, it being quite irrelevant, just like this thread is now.

Amps is a measure of electrical current:

The ampere (/ˈæmpɛər/ AM-pair, US: /ˈæmpɪər/ AM-peer;[1][2][3] symbol: A),[4] often shortened to amp,[5] is the unit of electric current in the International System of Units (SI). One ampere is equal to 1 coulomb moving past a point in 1 second, or 6.241509074×1018 electrons' worth of charge moving past a point in 1 second

https://en.m.wikipedia.org/wiki/Ampere

I have never used it as "power", nor "capacity" (capacity of what?) and have never seen it used as either.

Again, if there is a context where it is used in ways other than the standard above, it would help to provide a link or reference to better understand your meaning - which I'm struggling with.

 

[roubaixtuesday]

What you're missing is that the "48V, 13.33A battery" you mention will be a 13.33 amp-hour (Ah) battery. This means it has the capacity to supply that current for 1 hour, or half that current for two hours, etc.

Aha, now that does make sense.

Eg this random one I just picked from Halfords. @albion note:

Watts x hours (Wh) = Amps x hours (Ah) x Volts.

Divide both sides by hours and hey presto

Watts = Amps x Volts.

 

[albion]

And yet you FIRST said 'Amps x volts is the instantaneous power the battery produces, in watts (W)'.

Here, the only way that works is as I kept saying, out of context. That is the last I say or else I will end up doing a Basil Fawlty.
Understand what gets copied and pasted!!!

 

[roubaixtuesday]

And yet you FIRST said 'Amps x volts is the instantaneous power the battery produces, in watts (W)'.

Here, the only way that works is as I kept saying, out of context. That is the last I say or else I will end up doing a Basil Fawlty.
Understand what gets copied and pasted!!!

It's true at all times, and in context.

What is not true, ever, in any context is:

Wh = amps x volts

 

[roger06]

TLDR: wow! 2.6 inch 29er tyres, front suspension, electric power.

It really is fantastic. Those 2.6 Inc tyres makes mince meat out of anything the road can throw at me. So comfortable, not only in the ride quality (30psi) but no need to think or look out for cracks in the road, not as fussed about pot holes. It all adds to mental wellness, not having to go around avoiding the pitfalls, looking left and right, behind me, to make sure I don't veer into the path of overtaking cyclists (not that I'm clumsy with a normal bike, but all the looking around my space becomes a non-event when I can just plow through any cracks).

And going electric is brilliant. No longer do I get to work even remotely sweaty which saves time not having to shower. I also do not have to carry additional baggage, clothes and things like that for the return journey. It's also the bike that I feel ok wearing jeans on, so no time faffing around getting "the bike kit on" - it really is a get-on-and-go bike.

While I don't want to ride in the rain, I have mudguards for wet roads to stop spray.

There is a very slight problem in that the bike is really heavy and is quite noticeable when maneuvering the bike Tommy storage place at work but other than that, it's absolutely fantastic.

Oh, just one more thing: being an MTB, it has wide handlebars which means I cannot filter through traffic as easily as a road bike. It won't ever replace.my road bike, the experience is totally different, but I will certainly be using it a lot more.

A few stats: 18km each way, pretty flat, knobbly tyres, 29er 2.6in 30psi, I'm a big guy and used up 40% battery in total on auto power (so mainly using 3 or 4 out of 4 on the power thingie); riding at 25kmph whenever possible but accelerating reasonably gently from the lights and it seemed like quite a blustery day.

I too have bought an eMTB, mainly for commuting (6 / 11 miles depending on site). I've done this to make it easier to ride longer, unpaved routes purely to avoid roads as much as possible.

Sadley I've concluded that many close passes and other anti-cycle behaviour is now deliberate and ingrained in powered vehicle culture. I've had cars pass me within inches while honking the horn and gesturing.

So part of my route now involves a canal path, but it's unmaintained so wet, bumpy and muddy. I also cut through a holiday park to avoid roads. The ebike just makes this so much easier and gives me less excuse to just give in and take the car.

I ride almost always in Eco so easily get 65+ miles range but it's great to be able to bump up the power for rough terrain, headwinds or when I'm just knackered.