Typical subscribers save about 10% off their annual electricity costs by participating in community solar. For example, a typical subscriber who pays $90-95 for their monthly subscription in could expect to receive $100 in bill credits for that period. Over time, this can really add up.
Actual savings will depend on the actual production of the solar farm and the value of your bill credits over time as compared to the applicable utility rates established by your Public Utility Commission (PUC) and the specific terms of your subscription agreement. Of course, no one can predict the future, so savings are not guaranteed, although they are likely to occur.