Question

A 90-kW PV system is being proposed for a commercial building in an area with 5.2-kWh/m²/d insolation. The before tax-credit cost of the system is $5/Wp. Assuming a 0.73 derate factor: a) What is the annual electricity production that might be expected?

Answer 1

The expected annual electricity production for a 90-kW PV system with a 5.2 kWh/m²/d insolation and a 0.73 derate factor is 225,558 kWh.

Step-by-step explanation:

To calculate the annual electricity production of a 90-kW photovoltaic (PV) system, we need to consider the average daily insolation and the system's derate factor. The formula to estimate annual production is:

Annual Production = System Size (kWp) × Average Daily Insolation (kWh/m²/d) × Days per year × Derate Factor

Given a system size of 90 kW, an average daily insolation of 5.2 kWh/m²/d, a year with 365 days, and a derate factor of 0.73, the expected annual production can be calculated as follows:

Annual Production = 90 kW × 5.2 kWh/m²/d × 365 days × 0.73

Annual Production = 225,558 kWh

This estimation assumes that the PV system will operate under average conditions throughout the year.