I am having a PW2 installed this week. The original plan, was to install a critical load panel. Essentially to intercept my sub panel and add additional needed circuits. However, the more I think about it, why wouldn't I just back up the entire house? I have 7KWH solar system (enphase) and I use about 30 to 40KWH per day. This includes what I currently sell back to SCE. My high utilization is due to pool, fountains, outdoor bar, etc. While I understand that the PW2 would only run the entire house for a few short hours, Although with pool and other major equipment off, my utilization is less than 1kwh. I could simply control the load by turning equipment off, as opposed to having this off a separate panel. Thought would also be to add an additional PW2 at a later date. Goal of the PW2 is both for power failure preparedness as well as time shifting utilization from SCE.