4 ms·
This is ridiculous. People aren't charging 100% of the time, and even when in use, the chargers burst to 80kW, but they don't average 80kW. All you need are som
by nardi 10y ago
This is ridiculous. People aren't charging 100% of the time, and even when in use, the chargers burst to 80kW, but they don't average 80kW. All you need are some batteries to level the load. Assuming 20kW average, and stall being used 20% of the time, that brings your calculation down to 4,000/120 =~ 33m2. Accounting for night and bad weather, let's quadruple that to 133m2. That's about a quarter of an acre for EIGHT stalls.
- sandworm101 10y agoI skipped many other multipliers that negate any error in the needed wattage per stall. Top of the list: latitude. Demand will be constant throughout the year, but solar output can be radically different depending on the season. Then, is the horizon flat? If it isn't, then you aren't getting as many hours of sun. Then whether the panels are fixed or sun-tracking (tracking is better but require more space/maintenance). Tracking rigs are also much less space efficient when the sun is low. They end up shadowing each other for much of the day. Access roads, setback from obstructions (treelines) panel output degrading over time, energy losses in/out of batteries ... there are scores factors to undermine the per-acre efficiency of small solar farms located near to consumers. Imho tesla would do far better by building large solar farms in perfect locations and hooking them into the public grid. Panels at the charging stations can be the window dressing.