Comment by AnthonyMouse

Data centers are pretty useful for adding more renewables to the grid. They generally have both a UPS (for short-term outages) and backup generators (for long-term outages). UPS means they're already paying for inverters and some amount of batteries, and then in combination with a more renewable grid, it makes sense to put the grid storage batteries there, and they have the incentive to do it to take advantage of time of day metering by actually running on them during peak demand hours. Likewise, if you have a huge capacity backup generator and the grid is stressed because renewable generation is low (and therefore prices get high), you can turn it on. Which allows the grid to get more power from renewables the other 95% of the time.