You will have to determine the likely stay time of cars at your site. If it is a destination where people will stop for several hours, then 7kW chargers would be useful. You will probably get more revenue from what they are doing at the destination than from the chargers, but installation and running costs will be low.Anyone on here had any experience buying and running these stations, just had a quote to fit 3 chargers, never used them myself so no idea of the charges, but we are in a place where they will be well used, thanks for any info.
There are few cars that can take 22 kW on 3 phase AC, only the Zoe or certain old Teslas with dual chargers. Current Tesla S and X take 16 kW on AC, the Model 3 is 11 kW or thereabouts. The majority of other cars cannot take more than 7 kW.Thanks for the replies, l am just a little confused at the moment, the 50 150 +350 kw threw me a little as my quote was for a bank of three chargers, 3ph. 22kw, so l searched through all the charger adds, none stating how many kw. then l found a site, edfelec. with a full list of everything l wanted to know, it gave 3-7 kw for home chargers, 7-22 kw as a standard charger found in s/markets - town centres and private sites, it said the 50 kw plus sites were not suitable for the ave. family car, it does give the miles = charge time which was interesting, just a little less confused now.