Distance on battery

Electrically assisted bikes, trikes, etc.
ambodach
Posts: 609
Joined: 15 Mar 2011, 6:45pm

Re: Distance on battery

Postby ambodach » 15 Apr 2018, 7:21pm

I have a GTech Sport which I inherited. I did not buy it myself but the previous owner died before getting any real use of it.
Today has been my first real test which is a bit disappointing. I got 21 miles and the red light is on. About 2 miles were on steepish hills which I struggle with on my usual pedal power bikes and about 6 or 7 miles were into a vicious headwind. The rest were flattish or with a tailwind. It is very nice to get a push on the hills and into the wind as well as being much faster than my usual pooter. Speed never really fell below 13 mph except on the hills which went down to 11mph. If I had bought this I would be a bit peeved I think but since it cost me nothing I can hardly complain too much.

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brianleach
Posts: 298
Joined: 14 Jul 2007, 2:10pm
Location: Winchester, Hants

Re: Distance on battery

Postby brianleach » 16 Apr 2018, 7:31am

I don't know how the GTech works. Do you switch the power on and off or is it on all the time under 25?

If it was on all the time it was presumably using power even on the flat in which case I would have thought 21 was pretty good. As I said in my previous post I reckon I only get 12 to 17 k of use.

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horizon
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Joined: 9 Jan 2007, 11:24am
Location: Cornwall

Re: Distance on battery

Postby horizon » 16 Apr 2018, 12:24pm

This is a very useful thread. Although I'm sceptical about health claims for ebikes, overall I think they are going to be the bike of choice of many people. Technically, I think the breakthrough (lithium-ion) is already there.

So what I'm getting from this thread is that with ebikes there is a trade-off: hills, wind, distance, battery size/weight, speed, luggage. You can choose any of these but not all at the same time. For touring, you might indeed want all of them. For commuting, the OP's experience actually puts ebikes in a good light - there and back with an overnight charge.
HS2: a deeply saddening project built on greed and welcomed by those blind to its human consequences

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brianleach
Posts: 298
Joined: 14 Jul 2007, 2:10pm
Location: Winchester, Hants

Re: Distance on battery

Postby brianleach » 16 Apr 2018, 12:34pm

I think that is absolutely right from my experience and the sales promotions are rather misleading.

Until battery life improves I rather doubt that they are much use for touring except for short distances. Having had heart issues recently I thought an ebike conversion would be a way of still being able to tour.

I now do not think that this is practical even with a spare battery. Leaving aside the weight charging two batteries overnight would be a challange.

Fortunately the heart issues have improved following what the press seems to describe as "heart surgery" so I have booked a weekend in France in July to see whether I am up to non electric touring!!!

I shall continue to experiment with my converted hybrid in the meantime.

hemo
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Joined: 16 Nov 2017, 5:40pm
Location: West Sussex

Re: Distance on battery

Postby hemo » 16 Apr 2018, 3:10pm

21 miles is pretty good considering the battery is only 5ah/180wh. On average a ride will use 10 - 20wh per mile, a regular fit rider less then 10wh per mile.

ambodach
Posts: 609
Joined: 15 Mar 2011, 6:45pm

Re: Distance on battery

Postby ambodach » 16 Apr 2018, 5:31pm

My GTech is left on high power tho’ there is a lower setting which I have not tried yet. Interesting comments about distance but there is a poster who gets at least40 miles on his commute. Probably uses more pedal power and mebbe also a flattish road.

hemo
Posts: 117
Joined: 16 Nov 2017, 5:40pm
Location: West Sussex

Re: Distance on battery

Postby hemo » 16 Apr 2018, 6:26pm

How many of the 40 mile is in low power mode or with no power at all, other considerations are terrain, riding conditions, rider weight and cycling fitness. Because one rider can or says they can manage XXX miles from said bike and battery doesn't mean every one else can and in this case appears to be far beyond that many could manage for the acclaimed mileage & battery ah, though not impossible if you are determined enough and frugal with battery use.
Another aspect is age and overall general condition of any said battery, even though they maybe the exactly the same.

hemo
Posts: 117
Joined: 16 Nov 2017, 5:40pm
Location: West Sussex

Re: Distance on battery

Postby hemo » 16 Apr 2018, 6:45pm

ambodach wrote:My GTech is left on high power tho’ there is a lower setting which I have not tried yet. Interesting comments about distance but there is a poster who gets at least40 miles on his commute. Probably uses more pedal power and mebbe also a flattish road.


You need to try yours on low power to compare the same route/mileage, lower power will mean more effort from you in general as the controller will only ask for low power/amps discharge from the battery so in doing so will increase the range.

ambodach
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Joined: 15 Mar 2011, 6:45pm

Re: Distance on battery

Postby ambodach » 17 Apr 2018, 2:41pm

Will not have the chance to try the GTech on low power on the same route for a few weeks for comparison as I am home now in a totally different environment. Will use it in my home town which has short steep hills where high power will be needed. Mostly will be only for distances of up to 5 miles at a time at most. Seems to me it would be good for someone doing a fairly short commute who needs a bit of assistance. For non mobile handling would certainly be easier than most ebikes as it is much lighter and getting up the steps to my house is no more difficult than a normal pedal bike.