Yes you can charge back through the Pin 6 or Pin 1. They are electrically the same inside of the SSPB. That is how mine is hooked up and what is shown on the functional diagram.
The issue you are referring to is that there is a not a full 10 amp limit charging on pin 1 and 6; it is closer to 6 amps. The SSPB would handle 10 amps going out, but since I can't control the charging going in I put a reset able fuse limited to 10 amps /10 sec, or 6 amps/100 sec or 4.75 amps/1000, or 4 amps/10,000 sec etc...
Charging a battery you should not be exceeding about .25C ; for a 14 ampHr battery that is 3.5 amps; in steady state the trickle charger is closer to 1-2 amps max.
This only applies to the unswitched power pins 1 and 6. You should not try and charge from any other pin as the internal protections will not work. So either put a charger on either of these two pins or run the charger direct to the battery. For a power socket that is used to charge the battery (current going in) or charge an Iphone (current coming out) use only pins 1 or 6.
look at upper right hand corner to see charger connection.

Jim
















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