The short answer
Fit a Type 2 surge protective device at the panel, at the same time as the charger circuit. The Eaton CHSPT2ULTRA is the pick for a panel with two spare slots; the Leviton 51110-SRG is the alternative when there are none, because it is NEMA 4X rated and can mount outdoors beside the meter.
Quick picks
Ranked by fit for the stated use case first, then price, then warranty and support. Tap any row to jump to the full assessment. Commission rate plays no part in the order.
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 |  Eaton CHSPT2ULTRA Whole-Home Surge ProtectorA panel-mounted Type 2 device rated at 60 kA. | Protecting a charger that is wired into the panel | 8.8 | $70.99View on Amazon $79.99 list · 11% off |
| 2 |  Leviton 51110-SRG Type 2 Whole-House Surge PanelA NEMA 4X-rated Type 2 surge panel, which means it can live outdoors next to the meter — useful when the panel inside has no spare spaces. | A surge device mounted outdoors beside the meter | 8.2 |
What we ranked on
- Type 2 at the panel, because a hardwired charger has no plug for a point-of-use device.
- Surge current rating, with the honest caveat that all credible residential devices exceed what a typical transient delivers.
- Mounting flexibility. Two spare breaker slots is a real constraint on the panels that most need this.
- A visible status indicator, because these devices are consumable and silent failure is the default otherwise.
- Availability through normal electrical distribution, so a replacement in five years is a phone call rather than a hunt.
Why this goes in at charger-install time
The device is cheap; the service call is not. Your electrician will have the panel open fitting the charger's two-pole breaker. Adding an SPD then is minutes of extra labor. Deciding you want one later is a whole visit, and the most common reason people never fit one.
The full reasoning, including Type 1 against Type 2 and what these devices genuinely do and do not protect against, is on our surge protection guide.
The slot problem
A panel-mounted Type 2 device occupies two slots. The charger's breaker occupies two more. On a full panel that is four slots you may not have — and a full panel is disproportionately common in exactly the houses adding an EV charger.
That is the case for the outdoor-rated option. A NEMA 4X device mounted beside the meter consumes no indoor panel space at all, at the cost of a little more installation labor. Worth raising with your electrician before they tell you there is no room.
What this does not replace
A panel SPD is not a substitute for correct grounding and bonding, and it will not help a house whose grounding electrode system is inadequate — in fact a surge device depends on a good ground to do its job. If your panel is being upgraded, the grounding work in that quote is doing more for surge resilience than the device is.
It is also not a substitute for your charger's own protections. Several units include integrated surge protection; panel-level protection is in addition to that.
How we picked
Both devices are currently purchasable, UL listed, and available through standard electrical distribution. We verified published specifications against the manufacturer's own documentation on the date at the top of this page. We do not bench-test equipment — see our methodology. Ranking is fit for this use case first; commission plays no part in the order.
