Clipper Creek makes a UL listed LVL 1 unit. 12 amp with a 25 food cord.
https://store.clippercreek.com/featured/pcs-15-portable-ev-charging-station
They also supplied the Gen 2 GM Volt with essentially the same unit (stock). You could probably find a used one for $200, UL, 25 foot, and 12 amps. Not cheap, for a level 1, but portable and durable.
https://www.ebay.com/itm/175107539449?epid=6004257117&hash=item28c53901f9:g:sRMAAOSwLfVgxZfH
I regret giving away that unit, the charge speeds, at 12 amps, is noticable quicker over the stock Mini EVSE. We use Level 1 to charge the second EV, freeing up Level 2 for the Mini.
We haven't noticed any circuit limitations at 12 amps. Was sharing a 20 amp garage breaker with other lower draw appliances. Out chest freezer draws approximately *70 watts continuously. I'm guessing the washer OR heat pump dryer is sharing the same circuit, haven't had any issues with simultaneous use..... the same can't be said with running the dryer and a thirsty vacuum simultaneously, learned from that mistake recently.
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