I didn't bother going into incidentals like wiring, but you're absolutely correct that it adds up. In my case I have the wiring already place due to the large RPC and existing exterior panel which would make easy work to wire the outdoor idler. But someone starting from scratch should factor it in - opening walls, wiring, 3ph distribution panel, etc...can add up big-time.
Do you know if PP ever runs major sales? The RPC from American was appealing because once a year they have significant discounts on top of S&D/refurb. But by MSRP: you have a point, though I also didn't mention simplicity/reliability...but that's a bit harder to quantify.
While here: couple Q's about PP
- Any value to the hobbyist for the PP enterprise vs. simple? 7.5hp models. The couple things that caught my eye between the two are regen loads (not applicable unless I have braking added to my lathe) and surge protection.
- Does the optional on-off switch only disable the 3ph output or does it totally shutoff the PP (ie. no current draw)? I get the sense that its the former; if so, I assume a separate service disconnect would be ideal between the PP and breaker panel? Or do folks just leave PP on?