True grid parity without subsidies with storage around 2023 in the cheapest labor countries with moderately good insolation. Target $0.60/watt installed. If $0.10 for storage, then that becomes $0.50 without storage. At 35% module cost and 65% BOS, you have a module cost in projects at of $0.175 and a BOS of $0.325. The production costs will need to be around $0.13-$0.14 to achieve profits with Opex and shipping globally. By the way those production costs are in the mid to upper range of Perovskite prices suggested by GCL($0.10-$0.15).
These are my rough numbers. but this article suggests 2020-2023 in China for the first subsidy free projects though they do get reduced land fees to free land use.