Been using NOCO charges for a few years, have a pair of twin NOCO Genius 2, 2 amp chargers on the garage wall for the day bikes, ideal for all year round maintaining. For battery recovery I have an older version of the new Gen 25amp maintainer, pricey but has recovered a car battery from 3.5V. Andy
Got a double outlet NOCO on my wall. Really well made and pretty good at recovering almost dead batteries. Got mine from Halfords using my discount card.