SUCCESS - Boosted Board Backpack Solar - Part 2

I made a video last year about charging my boosted board from my Yeti 400 solar generator. This is a SUCCESSFUL re-engineering of that system, designed to get size and weight down to a level that can be comfortably transported via a backpack.
Here's Part 1 showing assembly process:
Here's Part 3, all about folding solar panels:
Here's the original Yeti 400 video that started this project:
Get your own boosted board today!
BoostedBoards Dual+: [amazon affiliate]
Here's the power meter used in the video:
"Watt's Up" RC Watt Meter & Power Analyzer WU100 Version 2 --- SALE! [affiliate]
These are similar to the panels used in the video (solar panels go in and out of stock quickly, so these may not be the exact brand in the video, but they're equivalent):
ECO-WORTHY 100 W 100 Watt 12 Volt Monocrystalline Photovoltaic PV Solar Panel Module 12V Battery Charging (solar panel 100w) on Amazon: [affiliate]
ALLPOWERS 100W Bendable Sunpower Solar Panel Water/ Shock/ Dust Resistant Power Charger for RV, boat, cabin, tent, or any other irregular surface: [affiliate]
KINGSOLAR™ 100W Semi Flexible Solar Panel Bendable Solar charger (Black): [affiliate]
HQST 50 Watt 12 Volt Monocrystalline Flexible Solar Panel: [affiliate]
For an idea, maybe buy four or five of these and tie them together with string to create a folding panel:
25 Watt Flexible Solar Panel 12V Mono Crystalline-Grade A Cells-MC4-25W Module: [affiliate]
Or maybe buy one of these:
EBAT 120W Portable Solar Charger Weatherproof Panel Foldable Backup Battery Charger for Phone, Tablet, Laptop, Golf Cart, Marine Battery for Travel, Camping, Shipping: [affiliate]