I had 100 miles to cover. I filled my water bottles, charged my batteries, applied sunscreen, and took off.
I used my motor sparingly in order to make it the whole way. I started out with 720 Wh from my two batteries. The panels gave me another 100. And I was able to freeload another 100 from the cafe where I had lunch. People look at you funny when you ask to use their outlet to charge a massive 12-pound battery, but so far no one has refused.
As I neared my destination the sky darkened and rumbled. A shadow passed over me and I felt as if a giant foot was about to step on me. The sky opened and out poured its contents. In this situation I usually just put on my swimsuit and keep biking. But a man beckoned me over to his porch. We sat drinking beers and watching the lightning crackle and boom like a fireworks show.
I finally reached my destination. My family and friends welcomed me. I was tired but happy. And I had proven to myself that long distance travel by electric cargo bike is possible and even enjoyable. Not necessarily enjoyable in the sense of comfortable, but enjoyable in the sense of meeting people and experiencing nature firsthand rather than from behind a window.
And I showed myself that solar power can have a valid supporting role in my suchlike travels. I think the ease with which an electric cargo bike can be made solar makes it a good starting point for future experiments.