The short answer
On a 100 amp service, buy for adjustability and load management, not for maximum output. The Emporia Pro is the pick because its PowerSmart load management reads whole-home draw through an included energy monitor and throttles rather than tripping. The ChargePoint Home Flex is the alternative, because it steps down to 16 A — a figure no load calculation will object to.
Every other roundup on this site ranks by charge rate. This one deliberately does not. On a service with no headroom, a 48 A charger is not a better product — it is a product you cannot install. What you want is a charger that fits the capacity you have and can use more later if that changes.
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 |  Emporia Pro Level 2 EV ChargerThe best-balanced 48 A charger for a typical US house: full 11.5 kW hardwired, and the only unit at this price that ships with a whole-home energy monitor so its load management is reading your actual panel rather than guessing. | Most households, and anyone with a tight panel | 9.0 | |
| 2 |  ChargePoint Home Flex (hardwired, 50 A)The most adjustable charger on this page: output steps through 16, 24, 32, 40, 48 and 50 A in the app, so one unit fits almost any panel and can be turned up later if you upgrade the service. | A house whose panel headroom is uncertain | 8.9 | |
| 3 |  Autel MaxiCharger AC Lite (40 A)The widest output adjustment range here — 6 A to 40 A in the app — plus an operating range down to -40 degF, which makes it the practical pick for an unheated garage in the north. | Cold climates and 1 A output tuning | 8.6 | |
| 4 |  Leviton Level 2 EV Charger (32 A, hardwired)A 32 A hardwired unit — the right size for a Wrangler 4xe, a Model 3 RWD, or any house whose load calculation will not support more. | A 40 A circuit, a PHEV, or a 100 A panel | 8.0 | |
| 5 |  Lectron Level 2 EV Charger (40 A, NEMA 14-50)A 40 A ETL-certified portable charger for roughly half what the smart units cost. | The cheapest charger worth owning | 7.9 |
What we ranked on
- Lowest settable output. A charger that goes to 16 A fits a service that nothing else will.
- Whole-home load management. The feature that lets a marginal load calculation pass, per NEC 625.42's allowance for limiting an installation's rating through controls.
- Granularity of adjustment. 1 A steps beat fixed presets when a calculation lands at an awkward number.
- Headroom to grow. If you later upgrade the service, can you turn the charger up instead of replacing it?
- Install cost at the low setting. A 32 A charger needs 8 AWG and a 40 A breaker, which is a materially cheaper circuit than 6 AWG and 60 A.
What we deliberately did not weight: maximum output, app polish, and cable length. All three matter on a normal service and none of them is the binding constraint here.
Why load management is the whole game
A load calculation has to assume the worst: everything on, car charging flat out. Load management breaks that assumption. The charger watches total household consumption and backs off when the oven, the dryer and the air conditioning are competing — then goes to full output at midnight when they are not.
Over a full night you lose very little total energy, because the throttling happens during the two or three hours the house is actually busy. What you gain is an install that passes, on a service that would otherwise have needed utility work. Our load calculation guide covers the code basis.
The circuit each of these actually needs
| Setting | Power | Breaker | Copper (conduit) | Load calc impact |
|---|---|---|---|---|
| 16 A | 3.8 kW | 20 A | 12 AWG | Minimal |
| 24 A | 5.8 kW | 30 A | 10 AWG | Small |
| 32 A | 7.7 kW | 40 A | 8 AWG | Moderate |
| 40 A | 9.6 kW | 50 A | 8 AWG | Significant |
| 48 A | 11.5 kW | 60 A | 6 AWG | Large |
Notice the bottom two rows. The jump from 40 A to 48 A is where the conductor changes and the install cost steps up. On a tight service you are rarely choosing between those two anyway — but it is worth knowing that the saving from dropping to 32 A is bigger than it looks, because 8 AWG is so much easier to pull than 6 AWG.
What to do before you buy any of these
- Get an Article 220 load calculation. Ask for the optional method as well as the standard one — it frequently finds headroom.
- Ask explicitly whether a load-managed charger changes the answer. If a quote proposes a service upgrade and nobody mentioned this, the cheapest option was skipped.
- Check your car's ceiling. If it is a plug-in hybrid at 32 A, the whole problem may already be solved.
- Consider measuring for a month. A monitor turns a conservative estimate into a fact, and can change which charger you buy.
Knowing what your panel is actually doing
Emporia Vue 3 Home Energy Monitor
The monitor on its own, for the house that wants data before committing to a charger. It is also the component that makes Emporia's load management read your real panel.
#ad Price as of October 5, 2026. How we make money
How we picked
Every unit here is currently purchasable, carries a real UL or ETL listing to an EVSE standard, and comes from a brand with an identifiable North American support path. We verified each one's published specifications against the manufacturer's own documentation on the date shown at the top of this page. We do not bench-test chargers, and our methodology says so in plain terms. Ranking order is fit for this specific use case first — commission rate plays no part in it.