I’ve been using the Bixpy PP-77-AP Power Bank paired with the Bixpy SUN45 Waterproof Solar Panel (PP-166 & PP-77-AP) to run my Lowrance fish finder and charge my GoPro batteries simultaneously while kayak fishing.
So far it’s worked out great! I also use this set up while primitive camping to charge my headlamps, cell phone, drone, and to blow up my air mattress with a pump. Let me know if you have any questions. Happy to answer them!