DIY solar charger followup / eskateboard / storing solar energy

My book DIY Lithium Batteries:
My book DIY Solar Power:
My book The Ultimate DIY Ebike Guide:

Electrek article:

Solar panel on Amazon:
Solar panel on Aliexpress:
DC-DC converter on Amazon:
DC-DC converter on Aliexpress:
MC4 connectors on Amazon:
MC4 connectors on Aliexpress:

The gear I use for my videos:
Camera – Nikon D5300:
Lens – Tamron 18mm – 270mm:
Thermal camera for iPhone/Android:
Camera drone:

Parts that I use:
48V 14.5 Ah Hailong (shark) battery:
36V 11 Ah bottle battery:
All ebike batteries:
All 18650 cells:
Bafang BBS01 kit:
Bafang BBS02 kit:
Bafang BBSHD kit:
100W Flexible solar panel:
18650 cells:
18650 positive insulating washer:
Nickel strip:
Spot welder:
Silicone wire:
Black 18650 cell spacers:
Vruzend cell spacers:
Large heat shrink tubing:
Small heat shrink tubing:
Foam sheet for protecting battery:
Kapton tape:
350W hubmotor:
36V/48V controllers I used:
Cycle Analyst:

***Question response book giveaway rules***
When you guys asks questions in the comments of my videos, I’ll try to answer them. If there are questions that I think would make a good video response, I’ll choose them to do a longer segment. If I choose your question for a video response, you’ll win a copy of my book The Ultimate DIY Ebike Guide (the paperback or the ebook), or my book DIY Lithium Batteries.
Here are some things that YouTube makes me say: This contest is not sponsored by YouTube and YouTube isn’t affiliated with it. I’m supposed to provide a link to the community guidelines for YouTube (…). YouTube is not a sponsor of this “contest” and by participating, you are releasing YouTube from any potential liability, whatever that might be. Privacy notice: I won’t steal your info. If you do win, you can choose to send me your address so I can mail you a paperback copy of the book (or some other prize if that changes) or you can send me an email address and I’ll send you a copy of the ebook. I will do everything in my power to immediately forget your personal information afterwards.