Solar WatchDog Timer Keeps Triggering

As far as I can gather from the documentation, I have everything connected properly.  I have an 8000mAH battery connected.  It's been charging with both an external supply and the solar panels on and off for days, but the charge done light never lights up.  It does power up the Pi Zero W though.

However what seems like about every 60 seconds, the WatchDog Triggered LED lights up on the sun control board and the RasPi resets.

Did I miss something?

Thanks.