solar power on a Pine64 tablet

[MarkHaysHarris777]

im making a Pine64 tablet with a c4 labs screen case, i want to put a 5v solar panel with a 5v 2A voltage regulator on the back to charge the 3.7V Li ion battery, im thinking about using a usb plug from the voltage regulator to the pine64 board, my questions are is this possible and do i have the voltage and amps correct to charge?

If your voltage is constant, and clean, then yes you may get away with it.  Better would be at least 2.5A (2500ma), @ 5.1v;   and this as long as you're connecting to the pine board's DCIN;  euler bus pin(4  +5v), pin(6  gnd).

The axp803 PMIC controls the charging, along with the ARISC. Don't try to charge your lipo directly with the 5v system!  (you will be sorry, but I spare you)

It might be better to have a 12v SLA system that powers the pine(s) via dc-dc converter;  have your solar system charge the 12v system, and allow the pine to run off the 12v feed via CPT or other dc-dc.  (this is how my setup works)  Be sure to have good filtering between the dc-dc converter and the pine(s), with plenty of decoupling caps. Its important to have the DCIN clean, and constant.