12/1/19 Tesla once again deployed the Megapack trailer containing 10 Superchargers to the Madonna Inn Supercharger Station in San Luis Obispo, CA
The technicians were working on it but I'm not sure if it was being repaired or assembled.
According to the Tesla tech on site this is the only one in existence currently. A single Megapack has up to 3 MWh of storage capacity and a 1.5 MW inverter. Good for charging ~100 cars.
"Owners are reporting that the stalls are capable of delivering 125 kW, which is not quite comparable to the new Supercharger V3, but it is impressive power for a mobile station."
