When I am running QRO with an FT-891 I have a Chins brand 12ah lifepo4 battery. I run the radio at 40w most of the time and the battery lasts longer than I do. I used to run it at 100w most of the time and the battery was good for 3.5-4 hours. Adding a Bioenno 60w folding panel to the equation, it’s pretty much an all day situation. I have been doing jamboree on the air for the local scouts for the past few years and for that I have been running 100w. Last year we kicked off at 0830 and shut down at about 1830 with no difficulties with power at all. That 60w panel keeps the battery topped off well. I have, so far, not felt the need to go out and get one of the “solar generator” setups. They don’t fit in my backpack and are too heavy and bulky to carry in my hand.?