Three LV Solar Arrays run a quarry nicely using an Energy Link; far less maintenance than engines, and it will only run during the day. You can limit the amount of energy the link uses by putting an LV transformer in front of it, but that's still more than three LV arrays will generate. More arrays and an MFE should allow the quarry to run at night as well, just make sure you have enough infrastructure built to process all the stuff it pulls up.