Published specs for the four units here. “Not published” means the manufacturer does not state that figure — the Lectron Nexus 48A is the case in point: Lectron publishes no operating-temperature range for it, so we record that as unstated rather than assuming either way, and keep it off our cold-weather list.| Charger | Max amps | Connector | Install | WiFi / app |
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| Lectron Nexus 48A J1772 | 48 A | J1772 | Hardwired | No |
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| ELEGRP 40A Portable Level 2 Charger | 40 A | J1772 | NEMA 14-50 plug | No |
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| Lectron Nexus NACS (Tesla) Charger | 48 A | NACS | Hardwired | No |
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| Lectron 40A Portable Level 2 Charger | 40 A | J1772 | NEMA 14-50 plug | No |
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The case for no app, stated honestly
Fewer things that can fail. A charger with no radio has no network credentials to lose, no pairing to redo after a router change, and no cloud dependency. Garages are hostile to WiFi — concrete, foil-faced insulation, a metal door and a router two rooms away — and a meaningful share of “my smart charger stopped working” is really a signal problem. Our connectivity guide covers solving it; not needing to solve it is also an option.
No abandonment risk. A charger is a fifteen-year fixture bolted to a wall. Phone apps and cloud services are not fifteen-year products. A unit whose functionality lives entirely in its own hardware cannot be degraded by a decision made somewhere else.
Nothing to update at 2am. Firmware updates are usually fine and occasionally are not. A charger that does not receive them cannot be broken by one.
Lower price for the same charging. These deliver identical amps to their connected siblings. The Grizzl-E Classic and Grizzl-E Classic Connect are the same cast-aluminum box with the same 40 amps and the same cable — we put that comparison side by side in Classic vs Classic Connect, and the price difference buys software.
What you actually give up
We are not going to pretend the trade is free. Three things are genuinely lost.
Usage history through the wall. The one your car cannot replace. The vehicle reports what it received; the charger reports what came through the meter, and those differ by charging losses of roughly 10%. If you want to verify what a session actually cost rather than estimate it — particularly on a time-of-use rate — you want a connected charger.
Remote lockout. Matters if the charger lives outdoors where someone else could plug in. On an enclosed garage unit, it does not.
Utility managed-charging programs. The one with money attached. DOE catalogs managed charging as a distinct incentive category, and those programs need to reach the charger. If your utility offers one and you want it, an offline unit disqualifies you — check before buying, using our utility rebate guide. Note that a straightforward purchase or installation rebate usually does not require connectivity; it more often requires ENERGY STAR certification, which the Lectron Nexus 48A and the Lectron NACS both carry.
How we chose these four
One piece of history first, because it moved the top of this list. The Grizzl-E Classic was our pick here for a year until our 3 September 2026 check found all three SKUs unlisted on Amazon, which cost it the slot. As of 28 September 2026 all three are listed again with live prices, and Grizzl-E never stopped selling it directly — the gap was an Amazon listing gap, not an end of life. Its review carries a buy link once more. We have not put it back at the top, because a listing that has already gone dark once is not what we want to send a reader to first — but if you want that specific cast-aluminum box with no radio in it, it is buyable again. The Classic Connect is the same box with WiFi, and so belongs on the other list.
Lectron Nexus NACS is the Tesla answer, and it is the cleanest expression of the argument on this page. Teslas schedule charging in the car exceptionally well, so a charger’s scheduler is redundant by design — which leaves a native NACS connector at a full 48 amps, in an IP66 body, with UL/ETL listings and ENERGY STAR, and no adapter to lose. Our Tesla roundup covers the alternatives.
Lectron Nexus 48A is here for anyone who wants 48 amps without the software. Hardwired J1772, an IP66-sealed body, and a 23-foot cable of heavy 15 mm compound Lectron says is built to stay flexible in freezing weather, with the wall-mount J-hook and plug holder in the box. It is the best-certified offline charger on this page — ETL to UL 2594 / 2231 / 2251 plus ENERGY STAR — which also means it qualifies for the certification most purchase rebates ask for. The honest note: Lectron publishes no operating-temperature range, so we make no cold-weather claim for it and keep it off our cold-weather roundup.
This 48-amp slot used to be the Grizzl-E Ultimate 48A, which we recorded as discontinued in August 2026 after its Amazon listing went dark. That call was wrong and we corrected it on 28 September 2026: Grizzl-E sells the Ultimate 48A at $383.99 in J1772 or NACS, alongside the 80A rather than replaced by it, and the Amazon listings are live again. It is still a genuine no-app charger — DIP switch, LED, no radio published — and its review carries a buy link once more. The Lectron keeps the slot here because we do not reshuffle a ranking on a listing that has already proved patchy.
ELEGRP 40A is what a no-app charger looks like when the money goes into the hardware instead of a radio. A genuine 40 amps on a NEMA 14-50, selectable down to 32, 24, 20 or 16 for a smaller circuit, a 25-foot cable, and an IP67 station body rated -22°F to 122°F— the toughest published rating in the budget band, and the closest thing on Amazon today to the weather-sealed brief the Grizzl-E Classic used to fill. Two honest limits: the connector is rated IP54, well below the station, so keep it off wet ground; and ELEGRP publishes no ENERGY STAR listing for this SKU, so it is the wrong pick if a rebate turns on that certification. Our ELEGRP 40A review works through all three of those trade-offs in full.
Lectron 40A is the most portable unit here — plug it into a 14-50, unplug it to take on a trip, and its 16-foot cable is the one you will actually enjoy coiling. ETL listed to UL 2594 / UL 2231. Lectron does not publish an enclosure or IP rating for it, which we record as unpublished and would treat as an indoor unit until they do.
Who should buy a smart charger instead
Four situations where we would tell you to spend the extra:
- Your utility runs a managed-charging program you want to join. That requires connectivity, full stop.
- Your panel is tight and you need load management. Dynamic load balancing is inherently a connected feature — see Emporia Classic vs Pro and small-panel chargers.
- Your car does not schedule charging natively. Rare on modern EVs, worth verifying rather than assuming.
- You genuinely want the energy data. A legitimate reason, and the one feature here that has no substitute.
The full two-sided argument is in smart vs dumb chargers, and if you land on the other side, our smart charger roundup is where to go next.
