[s_tec]

I installed the solar first, which cost about $10k for parts, plans, and permits. I got quotes between $18k - $26k for the same-sized system professionally installed, so this was a great savings for 3-4 weekends of physical effort.

I don't know how much I saved on the battery, since I didn't get any quotes. The battery was vastly more time and effort, since I had to move my house onto that backup loads panel.

If you just want to shift usage, the backup panel may not be necessary. The Enphase batteries do support a fully grid-tied mode, where they simply connect to your main panel as a branch circuit. I'm sure other brands do too. This would be an easy DIY weekend project, as opposed to a months-long home re-wiring project. The Enphase mandatory training would be the biggest downside for using them here.