Portable Level 2 Charger vs a Wall Mounted Unit
Short answer
A portable Level 2 charger plugs into an existing 240 volt outlet, goes in the boot for a trip, and is generally limited to 40 amps because it connects through a plug. A hardwired wall unit can go to 48 amps, is rated for permanent outdoor mounting, and has no plug and socket carrying a continuous load. Both need a properly installed circuit behind them.
At a glance
| WOLFBOX portable Level 1 and 2 charger, 40 A | Emporia Level 2 EV Charger, 48 A, J1772 | |
|---|---|---|
| Maximum output | 9.6 kW at 40 A | 11.5 kW at 48 A |
| Connection | Plugs into a 240 V outlet | Hardwired |
| Portable | Yes | No |
| Permanent outdoor mounting | Not intended | Rated for it |
| Circuit still needed | Yes, a dedicated outlet circuit | Yes, a dedicated circuit |
| Level 1 fallback | Yes, with an adapter | No |
Choose the WOLFBOX portable Level 1 and 2 charger, 40 A if…
Choose the portable unit if you travel and want one charger that works at home and away, or if you rent and want to take the charger when you move. The Level 1 fallback is genuinely useful on a trip where the only outlet available is an ordinary household one. It still needs a correctly installed 240 volt outlet at home, which is licensed electrician work.
Check WOLFBOX portable Level 1 and 2 charger, 40 A on Amazon
Choose the Emporia Level 2 EV Charger, 48 A, J1772 if…
Choose the wall unit for a home you intend to stay in. It charges faster, it is designed to sit outdoors for years, and hardwiring removes the plug and socket connection, which is the part of an outlet installation that wears and can overheat under nightly full load. Both routes need a permit and an inspection in most jurisdictions.
Check Emporia Level 2 EV Charger, 48 A, J1772 on Amazon
Related
- Electrical safety and what needs an electrician
- Home EV charger installation guide
- Installation cost calculator
Comparison based on published manufacturer specifications and the general consensus of owner reports. We have not tested these products side by side. Confirm current specifications and prices before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
We review them on their own too, in full detail: the Tesla Mobile Connector and the wall mounted Grizzl-E Classic.
Common questions
Is a plug in charger less safe?
Not inherently, and it does add a connection point that carries a heavy load for hours at a time. The quality of the receptacle matters a great deal, which is why cheap receptacles have been a documented source of overheating in EV installations. If you install an outlet, have a heavy duty receptacle specified and fitted by a licensed electrician.
Why is a plug in unit limited to 40 amps?
Because code treats a receptacle connection as limited to 80 percent of the circuit rating for a continuous load, so a 50 amp outlet supports 40 amps continuous. Getting to 48 amps requires a 60 amp circuit and a hardwired connection. That is the technical reason hardwired units can go faster.
Can I take a hardwired charger with me if I move?
It can be removed by an electrician, and it is generally treated as a fixture and left with the property. If portability matters, plug in is the honest route. Selling with a charger installed is often a selling point in its own right, which some owners weigh against taking it.
Do I need a permit for an outlet rather than a wall unit?
In most jurisdictions yes, because it is a new dedicated circuit in your service panel regardless of what terminates it. Permit requirements and inspection processes vary by locality. Your electrician will handle it as part of the job, and skipping it is a false economy that surfaces at resale or at a claim.
Getting your own panel and load numbers ready for an electrician? The EV Home Charging Install Planner is the paid version of these pages: 8 printable worksheets you fill in with your own numbers, plus the full PDF, $29.
How this page was researched
Specifications come from manufacturer documentation, listed safety certifications and verified owner reviews. We do not perform hands-on product testing and never claim to. Figures are researched planning information, not professional electrical advice. Last reviewed 2026-08-17.