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Level 1, Level 2 and dual-input chargers side by side

By Ethan WalkerPublished October 27, 2026Data as of October 27, 2026

The 7 Level 1 listings on the ENERGY STAR list are rated 1.8 to 1.92 kW at 120 V. At those ratings, taking a 75 kWh battery from 20 to 80 % takes 26 h 3 min to 27 h 47 min, against 4 h 21 min on a 48 A Level 2 charger with an 11.5 kW car. Most of the 30 dual-input listings are listed with their 120 V rating.

Three product types on one list

The ENERGY STAR file sorts AC chargers into three product types. Level 2 chargers are listed at 240 V; there are 424 of them. Level 1 chargers run on 120 V; there are 7. Dual-input chargers can run on either; there are 30. This site ranks the Level 1 and dual-input listings together, as one group of 37, because few of them are listed at 240 V.

For most dual-input listings, the rating fields describe the 120 V side. Only 3 of the 30 are listed at 240 V. The table shows each combination as listed.

As listed. A dual-input listing rated at 120 V may also run at a higher output on 240 V; the file gives one rating per listing.

Charging time at these ratings

At 120 V the rated outputs are small. The Level 1 listings are rated 1.8 to 1.92 kW, and the most common dual-input rating as listed is 1.92 kW. Taking a 75 kWh battery from 20 to 80 % at 90 % efficiency takes 26 h 3 min at 1.92 kW and 27 h 47 min at 1.8 kW. At the 1.44 kW rating of some dual-input listings it takes 34 h 43 min. A 48 A Level 2 charger with an 11.5 kW car does the same job in 4 h 21 min.

Over a night of eight to ten hours, a 1.92 kW charger adds about 14 to 17 kWh to the battery at 90 % efficiency, which the tool turns into miles for any car efficiency.

Standby draw

The Level 1 listings have a median standby draw of 1.25 W, lower than the Level 2 median of 3.66 W. The dual-input listings have a median of 3.735 W, close to Level 2. The two lowest values in the whole group are the Tesla 1937825 at 0.43 W and the Schumacher SEV1670 at 0.69 W; the first is the lowest standby draw of all 461 listings.

The group of 37 is small and concentrated. HBE accounts for 15 of the listings, so the group's medians lean on that brand's results; the Level 1 and dual-input page also gives medians per model group.

The dual-input listings rated at 240 V

Only 3 dual-input listings give a 240 V rating: the Deltran Battery Tender, , 022-3017 (32 A, 7.68 kW), the Tesla 1937825 (32 A, 7.68 kW) and the NUVVE POWERPORT PowerPort Neo (80 A, 19.2 kW). Because they are listed at 240 V, the tool's picker uses that rating for them. The other 27 dual-input listings are listed at 120 V, at 12 or 16 A.

The 120 V dual-input listings come mostly from one brand: HBE has 14 of the 27. Several of them have reported identical test values in the ENERGY STAR list to listings under other brands; the guide on listings that share test values lists those groups.

Allowances, idle draw and networks

Medians per listing.

The Level 1 listings have the smallest standby allowances, a median of 4 W, and use a median 31.2 % of them. Only 2 of the 7 are networked. The dual-input listings look more like Level 2 units: 19 of 30 are networked, and their median idle draw, 8.725 W, is above the Level 2 median of 6.175 W.

The Level 1 group is also small in brands: 5 brands hold its 7 listings, against 12 for the dual-input listings and 137 for Level 2.

Portable units

Four listings on the whole file are marked as portable: EvoCharge Base, EvoCharge Home, EvoCharge W1-1962-7PT0 and Tesla 1937825. By product type they are 3 Level 2 and 1 dual-input. The listing field says only that the unit is portable, not how it is mounted or carried.

Reading the listings

Because a dual-input listing may show only its 120 V rating, its listed kW can understate what it delivers on 240 V. This site shows the rating as listed and never places dual-input listings in the Level 2 amp groups or uses them as Level 2 presets in the tool. In the charging-time tool they are labelled with their listed voltage.

All 37 listings, sorted by standby draw, are on the Level 1 and dual-input page. The charging-time guide covers the Level 2 side in more detail.