Yes, on different addresses. However, if you wanted to claim STCs on multiple systems at the same address you must prove that each system is independently eligible. This means that premises at the same address must be clearly separated from the other premises.

For example on a dairy farm, the farm buildings and residential house would be counted as two separate premises and both are eligible to separately apply for STCs.

A garage or other small building located near a house would not count as a separate premise so only one application for STCs could be done.