Standard Test Condition ("STC") efficiency and cost per watt are a large part of the equation but one must consider the demands of utility-scale and large-commercial power systems dictate and therefore should also evaluate the product specifications and often most importantly, you manufacturing partner, so during your research, consider the following:
- Balance of System (BOS) and installation labor costs
- Annual kWh yield per kWp installed ("real-world performance")
- Warranty details including performance degradation
- Support and logistics services
- Environmental impact and recyclability at end of useful life