Square D – HOM250PSPD Homeline Whole House Surge Protection Device, 50kA, 120/240V, 1-Phase, No Wiring, Plug-On Neutral

Easy install, time will tell…
Installed easily in my interior subpanel (main panel is exterior, I put another brand and style rated for exterior use on that one) in the closest breaker position to the main feed and now we see how it performs… great value up front.

Exactly what I needed!
Great, easy to install. Surged 3 times since install with 0 issues to my electronics!

Does not necessarily fit right into panel without mods
This is pitched as a whole house surge protector you simply plug into your Square D Homeline panel.It is a straightforward install, however note a couple of things:1. The required neutral connection is done (for installation convenience) via a clip on underside of unit that clips over the neutral bus bar adjacent to break mounts – normally this kind of unit would use a free white neutral wire that one manually connects to neutral bus bar. This means you must have the neutral bus bar extending to the open breaker slots you plan to use. Mine did not, so I had to reshuffle breakers on panel to free up open slots further up that were adjacent to the neutral bus bar.2. I also had to relocate the existing neutral wires screwed into bus bar right by the free breaker slots I wanted to use, and had to remove the wire securing screws in the neutral bus bar there, as the neutral clip on the back of the unit will not fit over any wires or screws.3. There are two grooves on back of the unit, one for neutral clip mentioned above, the other is notched to fit over the plastic mount on panel. This plastic mount on my panel had a different notch pattern and had to be ‘modified’ so the unit properly clicked in place. Basically I twisted off a couple of the plastic notches. Given the neutral clip is quite secure, the unit is securely mounted even with this modification.** Note please ensure you switch off panel power when installing this (well, really of course you always should) – for real this time – do not be lazy. You have to fiddle around close to live circuits and it not a happy ending to take shortcuts.Before installing or purchasing take a careful look at the unit to ensure you are clear how it will fit in your panel. I am just recounting my experience, not offering expert advice you should follow.

QO panel
Works on a QO panel. connected closest to the feed.

Easy to install and works.