### Technical Help Calculating Annualized Solar Thermal Efficiency Requested

A competitor has requested help calculating the annualized solar-to-desalination thermal efficiency. Any guidance would be appreciated. The formula in question is listed on page 64 of the official rules here: https://americanmadechallenges.org/solardesalination/docs/Solar_Desal_Prize_Official_Rules.pdf#page=64

See specific questions below:

1. Does Sigma mean that I have to sum 8760 and Qnet (∑8760+Qnet = 8760+Qnet)?

2. Also, is this formula sufficient to calculate the annualized solar-to-desalination thermal efficiency of technology with TES?

3. In what units should the result be (kWh/m2/year?)?

See specific questions below:

1. Does Sigma mean that I have to sum 8760 and Qnet (∑8760+Qnet = 8760+Qnet)?

2. Also, is this formula sufficient to calculate the annualized solar-to-desalination thermal efficiency of technology with TES?

3. In what units should the result be (kWh/m2/year?)?