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50W seems rather low for a a 1m^2 panel. I have some older 250W panels (1.6m^2) and get around 220W in the summer.

Also, how are you measuring a 10-15W load? When plugged in, the charger is going to pull it's rated load from your battery bank (I'm seeing ~84W including inverter losses).

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System peaks around 57W, with battery charge rate limits and frequent environmental disruptions (clouds, angles, etc).

Battery (Goal Zero Sherpa 100AC) shows output load. Lowest draw on MacBook Pro 15" is 7W, usually idling 10-15W, pulls about 50W when charging.

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