Sure the charge is slow, but you can plug it in the evening and let it charge during the night, like you'd do for a smartphone.
Depending on the capacity you may not get a full charge, but it is enough for most uses. If it charges enough for what you'll do during the day, it isn't a problem at all.
It's trivial to get a 240v circuit installed, even an electrician apprentice can do it with their eyes closed. Alternatively, you can install a battery bank that discharges at >120v while being plugged into a 120v circuit.
And it's not trivial when you don't live in a place that allows for you to do that, which is what this article is alluding to.