Here are the results of a unscientific test I did on the performance of my Orbea Gain battery.
Hopefully this may help potential buyers and pertinent to a few recent posts will include my findings on the performance of the battery
when on it's last 25% of charge.
As with all e-bikes the largest single variable is the rider, and so for newcomers here who haven't 'slogged' their way through 60 odd pages
I include the following. I am 73 years of age and approx 71kgs. The last few years I have ridden 4,000- 5,000 miles a year shared between
my Gain and an indoor trainer setup with a dedicated bike on a Tacx Neo smart trainer.
My Gain is a 2019 D30 (shimano 105) which has completed 2,885 largely 'blameless' miles. It is fitted with full mudguards
and rides on 38mm 'gravel' tyres. On the road with water bottle and my added accessories it weighs approx 16.5 kgs !
I ride almost exclusively in the lowest assistance setting and I have my 'engine settings' at Lowest=90%. Medium=80%. High=70%.
This 'test' came about after reading the MAHLE ebikemotion page advice/recommendations that include:-
"How to calibrate the battery: Advice is to periodically discharge the battery to 0% before recharging to 100%
Prior to this test my battery had never been discharged to 0% and has been overwhelmingly used in the 25>85% range.
So my battery was 'run down' to 0% and charged to 100% and for clarity I will detail my 7 rides over 10 days.
Miles/ Time/ Avg speed/ Elevation Gain/ Battery used/ Battery remaining
1. 19.89 1:15:14 15.9mph 558ft 12% 88%
2. 23.99 1:27:53 16.4mph 774ft 13% 75%
3. 16.50 1:00:49 16.3mph 449ft 12% 63%
4. 23.37 1:30:12 15.5mph 1,247ft 22% 41%
5. 19.15 1:09:34 16.5mph 891ft 14% 27%
6. 19.13 1:07:00 17.1mph 890ft 11% 16%
7. 19.15 1:08:53 16.7mph 892ft 11% 5%
(N:B Ride 5/6/7 same route)
.
Totals.......................................................................
141.18 Miles 16.34 Avg speed 5701 feet 95% used 5% remaining
Observations. I have to be happy with the total mileage but not a lot of climbing involved (bearing in mind the mileage)
The total mileage would fall significantly as the Elevation gained increased.
Ride 7 I felt 'knackered' from the start, borne out by comparison with ride 6 but 11% battery used on both rides ?
All rides only lowest assistance used.
Rides 5/6/7 were chosen to gauge battery performance over the same course/conditions over the last 27% of remaining battery charge.
I see no significant difference in these 3 rides, and my battery seems to discharge linearly ?
I guess battery discharge may seem inordinately high towards the end of a ride, if you have maybe increased the assistance level ?
You are tired and your cadence has slowed ? I understand the Gain motor balances power output against rider input based on cadence.
There is no torque sensor as on some e-bikes.
Ok, I have filled an hour or two and exercised my tiny brain doing this but feel free to tell me if you think I'm talking 'tosh'
P.S Oops ! I tabulated the Miles / Time / Avg Speed etc and it shows fine on my hard copy but after submission the tabulation is missing ? Hope it makes sense ?