When charged to 100%, it allows more power than it can actually accept (60W max input) to pass through and charge devices plugged into it. Internal battery is maintained at ~100% as long as panel remains in full sun.

I couldn’t find this detail anywhere in the documentation or reviews, so I’m making a video in case you’re looking to buy this model.

This is the Harbor Freight Jackery Explorer 290 that retails for $299, paired with the Thunderbolt 100W solar panel which retails for $129.

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