I tested it myself and got good results.I bought this unit while it was special sale. I tested 2 times the 1st time during smoky sky (CA has wildfire), no sun around 4PM and saw current flowed into battery around 120mA at ~14V.
The 2nd time when I got good morning sun light around 11AM. This time I tested with no load and with 60 watts light bull.
At no load I saw current flowed into battery was 1.15A at ~14V. With load I saw current flow into battery was 3.25A while current flowed to load was ~4.8A.
Based on this I can tell solar panel supplied 3.25A X 14V = 45.5 watts at 60 watts load. The battery is 35A hour mighty max. It is hard to say how much more sunlight to get more current. But it was about 50% of 100 watts.
Conclusion: All works but the power from the panel is 50% less than spec. I can use this for router and monitor and laptop during power cut off (PG&E). However, I need one more panel to provide more power.
by Chanh