I've got an all-in-one Pecron E3600LFP 3kWh battery, 2x 1200W MPPT, 3600W inverter, AC charger. It's 35 kg which (at 62) I find ok to move around as it's not too large and has good handles on the top. It was a LOT harder to get into my car at the store in the huge featureless shipping box.

I was glad I didn't get the (exactly twice the price, 4kWh, 4kW) Ecoflow Delta 3 Pro which weighs 51.5 kg!!
The Pecron takes up to 4 expansion batteries EP3000-48V of 3kWh each, for a total of 15kWh. Each battery weighs 26 kg.
I don't have any yet but I think maybe I'll get one, for 6kWh total, which should see me through from dusk to dawn for at least the summer and maybe a good part of spring and autumn. (I'm ok with using night-rate power between 11 PM and 7 AM to maintain some minimum state of charge when needed)
The price is more than for DIY LFP batteries, but I think it's not stupidly more, and worth it at US$809
https://www.pecron.com/products/pecron-ep3000-expansion-battery-3072wh