They are putting these units at airports in the US, they can be used to charge electric aircraft and also vehicles, especially the vehicles that are used at the actual airport. They have a semi tracking solar panel system on the top, they have battery storage in the stand, they have a pad which acts as the balancing system to stop them getting blown over and you simply drive up onto the pad, plug-in and you get a fast charge from the batteries in the system so it is DC to DC which is much quicker than AC to DC (I am told) apparently there is enough to charge 3 Tesla vehicles in the battery system alone and any time there is no sun it operates from mains electricity. These systems can be put out in rows like parking bays and they are standalone, there is no other infrastructure needed, just place them on the ground and wait for the sun to come up. They can also use a couple of extra banks of solar panels on the roof of a building or something or in our case a hangar if the units are getting a lot of use. The panels are roughly 5 kW and you can have remote panels connected up to, I think 35 kW if you wish. It used to be called the EV Ark but apparently someone jumped in and trademarked the name so it is now called BEAM and I have seen about 10 of these in California in some rural airports