So you don't unflag unjustly flagged posts due to formatting problems? Stange. For me, it's the substance that matters, not the superficial.
As I did not find a way to edit my post for conventinal font selection, I will repost it:
I need passthrough so bad.
I am a fan of foldable solar chargers. I own 10 of them, including an 14W Anker (which has the worst claimed to real watt ratio by the way, just outputs 7W. My Kingsolar 14W, same size, outputs 10W, tested with electronic load) and have a solar backpack. My backpack is nice, has a usb plug in the shoulder strap, so the powerbank inside a side pocket can charge my phone in my jaket pocket.The backpacks solar panel is meant to be connected to the powerbank too. It has to have passthrough charging.
I also have tons of powerbanks, some claim to be passthrough capable. Not a single one is usable for my application. All of them just have a makeshift-passthrough. Using solar chargers directly to charge phones, you get lotS of problems when clouds come. My phone permanently plays the charge- nocharge-song. Annoying. Lots of phones dont even restart powerful charging once the chargecurrent dropped. So it makes ton`s of sense to put a powerbank between it, so it gets the full, uninterrupted Amps the powerbank delivers while the solar input just helps.
NONE, I repeat NONE of my 20 powebanks support solar operation. It`s so annoying. Goalzero Flip 10 and 20: So praised and from the solar specialist, but behave jut like a cheap, non-passthrough-capable easyacc6400.
It is always the same: Use a powerful charger to charge the powerbank and the phone gets charged reasonably well at way lower voltage than in no-passthrough mode. But if you use a 400mA solar charger, or a powerful one in clouds, not a single one of my socalled "passthrough"-banks delivers a mA more than the solar panel delivers at the input. So when the sun is covered, the output collapses, Powerbanks reset, the charge-nocharge song is played all the time. It is actually better if you dont use those makeshift-claim-to-be-passthrough powerbanks and charge the phone directly.
My Anker PB-AS004 doesnt help as it only has 12V input.
All other Ankers like PowerCore 5000mAh Powerbank or the bigger 20000+ one don`t work as well. And those super-hyped "Solar specialist" goal zero units perform really abysmal in this regard despite the hefty pricetag.
Please, please be the first and only powerbank manufacturer with a true solar passthrough powerbank on offer. Make one. One that charges my phone with stable 2A and 5,1V while being charged from a 200mA panel.
And it IS possible to make one. I have modified a cheap chinese powerbank, I just added a chréap separate, TP5000, 1500mA Charging pcb parallel to the stepup and it works like charm. You have additional losses, ok, as the charge current goes through the tps with the losses due to efficiency, and then gets transformed up again with additional losses by the original stepup. But It delivers superstable passthrough operation with full output voltage and amps, and thats much more important for me than 5% more loss.
I cannot take my own unit with me on airplanes, i' ll get problems with security, so i still need a factory-build.