About this project
Michael Polák from the Czech Republic calls himself a geek: ex-programmer, ex-musician, internet service provider and fan of decentralised social networks. He rode the big Sun Trips of 2015, 2018 and 2024.
His machine is closer to a solar motorcycle: a two-wheel recumbent built on a cargo bike frame, with an aerodynamic cargo box, a 1,000 W direct-drive front motor with regenerative braking, a 21 Ah Li-ion battery stepped up to 48 V, and three flexible 150 Wp ETFE panels as roof and front panel (450 Wp). Top speed about 40 km/h, weight about 70 kg.
“Most Czechs are sceptical about renewable energies, so I am seeking a fun and cool way to communicate the possibilities.” He posts on Mastodon as @xchaos.
Technical data
| Rider | Michael Polák (Czech Republic) |
|---|---|
| Vehicle | Two-wheel cargo recumbent with aero box |
| Motor | 1,000 W direct drive front, regen braking |
| Battery | 21 Ah Li-ion, step-up to 48 V |
| Solar | 3 × 150 Wp flexible ETFE (450 Wp) |
| Speed / weight | ~40 km/h, ~70 kg |
| Sun Trip | 2015, 2018, 2024 |
Links
- Mastodon: @xChaos@f.cz
Sources
Photos and details come from the rider’s profile on The Sun Trip website.
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