Search found 183 matches

by solarEbike
Dec 25 2020 11:54pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

As long as this thread is getting bumped to the top, allow me to throw in a YouTube video recommendation. Light Speed is a new documentary about last year's World Solar Challenge in Australia. These solar race cars were the inspiration for my project back in 2006. I thought "sure, these cars ha...
by solarEbike
Dec 25 2020 11:04pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Your regen brakes will charge directly to the battery without interacting with the solar charger controller. There will be no problem. All the solar system sees is an increase in battery voltage. Exactly right. There's no meaningful conflict. When my battery charge is at 90% or higher, regen brakin...
by solarEbike
Oct 07 2020 10:11pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Did you encounter any unexpected difficulties, such as flat tires? Just one flat tire on day 1, thankfully. No serious mechanical issues. My trailer's suspension "collapsed" on the way back but fortunately it was just a bolt that worked it's way loose from all the vibrations and I caught ...
by solarEbike
Oct 06 2020 8:24pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Genasun GVB-8 vs CTK-EV300

Here's a teaser from a project that's currently in my video editing queue.
Genasun-GVB-8-vs-CTK-EV300.jpg
Spoiler: the performance difference in terms of daily Wh is negligible.
Genasun-GVB-8-vs-CTK-EV300.jpg (315.28 KiB) Viewed 765 times
by solarEbike
Oct 06 2020 8:04pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

How many solar watt-hours did you average a day? Here are the trip stats from the end of the video. 20,104 Wh and 12 days looks like 1675 solar Wh/day but that includes solar Wh generated during my non-travel days. If I add up just the travel days, I averaged 1472 solar Wh/day with a low of 1079 Wh...
by solarEbike
Oct 06 2020 6:36pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Since Alaska isn't another country, just call that a practice run. Then you and your bike can take a boat and bypass Canada, so the virus doesn't impede some real progress. Take a month or 2 to see Alaska by bike in late May or early June and get that advantage of very long days with your solar pan...
by solarEbike
Oct 05 2020 11:55pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Just one question. When you gonna get out of that fire infested hellhole and get on the road? It's been 2.5 years of analysis, so time to come out of the analysis paralysis phase and do it. I've been waiting on the message "John I should be hitting CR on about X date, how to we meet up?" ...
by solarEbike
Oct 05 2020 10:25pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

I took a trip down the coast to visit relatives and put the whole rig, gear and rider to the test. I figured I would post here when I got back but I'm not finding the motivation for a detailed write-up. Here's a video I put together. How about an open question and answer session? What do you guys wa...
by solarEbike
Sep 15 2020 6:36pm
Forum: EBike General Discussion
Topic: One stop for solar charging ebike info?
Replies: 46
Views: 1946

Re: One stop for solar charging ebike info?

Aluminumwelder, please come back and give a review on the Chinese MPPT charge controllers. I hope they are a good product. These look awfully similar to the one Alex reviewed except they added under-speced 12v and 5v outputs (6w and 5w only?!). You can buy just one unit for US$30 on eBay or AliExpr...
by solarEbike
Aug 22 2020 10:53pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

That last photo reminds me of our bush fires here in Australia over the summer. Was scary stuff! It was surreal. At New Brighton beach, there was some light ash falling and water-dropping helicopters flying directly overhead. The total area burned so far is only about 1% of the Australia bush fires...
by solarEbike
Aug 22 2020 5:04pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Update on the wind-gust-challenged trailer

I decided my wind gust problem was mostly hardware related. The adjustable driveshaft clutch I'm using to protect the tiny gearbox of the motorized tilt mechanism was not strong enough to hold the panel in place against a sudden wind gust. Even when the panel was level, a slight updraft could sudden...
by solarEbike
Aug 17 2020 8:57pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Fabric tail fairing mock-up. What do we think? Is this worth pursuing? Over decades of riding, and lusting after higher speeds, I found that my average speed on a long day never got over 15 mph. At that power level, adding fairings didn't help. Thanks, Warren. I keep coming back to this every coupl...
by solarEbike
Aug 15 2020 9:12pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Fabric tail fairing mock-up. What do we think? Is this worth pursuing?
IMG_6533.jpg
IMG_6533.jpg (208.46 KiB) Viewed 1514 times
[youtube]k7IBL_LM2Iw[/youtube]
by solarEbike
Jul 21 2020 11:34am
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

I find this interesting as I've found the opposite. After I first put a solar panel on the front of my semi-recumbent I noticed a significant improvement in cruising speed (45-50kph) efficiency of about 50W+. I've increased the size of the panel over the years from 15W to 40W now and the efficiency...
by solarEbike
Jul 20 2020 1:33pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

I was wondering why I dont' see any aerodynamic trikes compete in sun race... I think this is one of those things that seems simple and obvious until you actually try to implement it. It's a challenge to make a fairing light enough so the gains aren't eliminated by the weight penalty during slow hi...
by solarEbike
Jul 13 2020 4:55pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Does automated tilt tracking make sense on a solar ebike?

Now that I've ridden several hundred miles with the new sun tracking trailer, let's revisit the question of "how much more energy do you get with sun tracking?" The short answer is "it depends" and "probably not enough." We'll need some definitions of sun tracking in th...
by solarEbike
Jul 05 2020 2:07pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Thanks -- this has been *very* useful information and will save me from multiple trips down the wrong rabbit holes. I can't begin to express the real gratitude I feel for the amount of your time and hard work that you're willing to share with total strangers like me. If your travels ever take you t...
by solarEbike
Jul 04 2020 7:01pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

I agree that using your design as a "starting point" is likely the wisest approach, since my foot/pedal clearances might just be sufficiently different. Having an actual printed piece would allow me to get more accurate dimensions, and would be an easy way to produce a prototype. Sounds g...
by solarEbike
Jul 04 2020 2:27pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Thanks for the great advice -- the arrows you've taken in your back are definitely making life easier for those of us who are following in your footsteps. Hang on a sec... If I'm in the front, you're following in my footsteps and the arrows are in my back, who is doing the shooting? Unfortunately, ...
by solarEbike
Jul 03 2020 2:52pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

It will take a while to digest all of the data in your magnificent post, but I think you've definitely earned a place in the history books for this achievement. I appreciate the sentiment but I've managed to remain humble by remembering that the solar bike record is held by 2018 SunTrip participant...
by solarEbike
Jul 02 2020 7:27pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

The 200 mile test ride

A deadline has a wonderful way of focusing the mind. I got my custom encapsulated solar panels in August of 2018 and kept putting off the irreversible final step of bonding them to my new nearly-finished trailer until two weeks ago. Some of it was about wanting higher confidence that I hadn't overlo...
by solarEbike
Jun 24 2020 11:07pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Indeed, even if you went to 20 degree adjustments you'd see almost no change in harvested power. Sure, for some definition of acceptable loss. At 20° error, the loss is around 6% which kind of defeats the point of having automated sun tracking. Admittedly, the tracking is more of an interesting exe...
by solarEbike
Jun 24 2020 5:27pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Here's a short time lapse of the sun tracking while the bike is stationary. I'm looking forward to doing these in more scenic locations in the future. [youtube]5p6qLDJF6zQ[/youtube] Eliminating the clutch will reduce the backlash which means I could do smaller, more precise angle adjustments but hav...
by solarEbike
Jun 24 2020 1:45pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

solarEbike, wow it looks awesome. Thanks for sharing. Hello and welcome to the forum. Thanks for creating an account just to leave a kind comment here. the total solar Wh was 10% higher than the model predicted. Either my model inputs are too conservative or the perfect cloudless day had more insol...
by solarEbike
Jun 19 2020 2:48pm
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 55726

Re: Around the world on a solar ebike

Thanks for all the suggestions. I've done several test rides with the handlebar mounted potentiometer to limit the maximum tilt angle and it appears to be quite effective in terms of giving me fine manual control of the wind profile on the fly. I don't mind having to fiddle with it for now since it'...