1,229 Wh energy storage, 5-year warranty, 1,500 W AC output power, 1,000 W AC charging power - the Anker 757 power station has some impressive buzzwords in its luggage. We test how the 1,700 Euro (~$1843) "solar generator" performs in everyday use, from charging via the Anker 625 solar panel (370 Euros/~$401) to using the self-produced electricity. https://www.notebookcheck.net/Powerstation-Anker-757-and-solar-panel-Anker-625-in-hands-on-Stand-alone-system-for-on-the-road.682867.0.html
I am testing the system right now in cloudy conditions. It's been 24 hrs & I got 24%.
Most of the emergencies are caused by bad weather. So unless you are in a sunny state Florida or Arizona, the solar panels will not recharge the battery in a timely manner.
The battery is just a bandaid.