jason.flood
Well-Known Member
- Region
- United Kingdom
- City
- Edinburgh
Thanks for you insight Stefan. I follow your rationale wrt the battery consumption calculation and realized where I had made a mistake.A great write-up Jason! Thank you!
You have used 68% with the reference to the 320 Wh battery, which is 0.68 * 320 = 217.6 Wh. At least in theory. What assistance modes were you riding in? (Your battery consumption factor of 7.8 Wh/km was pretty high, and similar to a full power e-bike; I attribute it to your hills, hard terrain, and pretty a low temperature).
You could. I recommend you ride with the RE though (unless you want to shave a kilogram or so off the e-bike weight). There are several good reasons to use the RE:
I recommend you ride on both batteries until you gain experience. My own experience is both batteries in average SL assistance of 55/55% under warm weather and flatter terrain than yours are good for 116 km, which is far far more than your first long trip.
- As you use both batteries, there will be a smaller number on recharge cycles on both of them, resulting in a better longevity;
- The combined power of both batteries used in parallel gives you a very good power delivery even if both batteries are at the low charge level;
- In case you need to use Sport or Turbo, each of the batteries needs to deliver less current to meet your assistance demand, which is good for the batteries;
- You never know what awaits you on your trail. Say, you need to return home very fast (in Turbo) because of the weather breakdown?
Enjoy!
I can see you have calculated 7.8WH/km based on the Specialized app distance of 27.85km. However the app lost connection or paused half way through the ride. The stats however seem to get captured and the end of the ride but without the full distance registered. Im a bit skeptical about what the Specialized App (can I say Spapp) is saying. The actual distance travelled was 57.2km per the Komoot gps trace in the first picture.
I think this would put my consumption closer to 3.8WH/km
I was in eco 35/35 for the whole ride.
However, if I say the last 12km was downhill through the city, but with with a fair number of stops for junctions and traffic lights; I could take maybe 10km of the total and say 47km which would take the journey to about 4.6WH/km
Given I was riding in ECO the whole way, do you think I should be concerned my battery capacities may not be as advertised?
Thanks