## How to calculate how many solar modules you need

March 31, 2020

**How much solar power do you need?**

**How many modules are needed for this?**

**What is the efficiency?**

**How would you calculate?**

Solar Power Professional Development Course for Engineers Sizing a PV System Calculate the required PV power capacity based on – the energy consumption of the load and – the number of peak sun hours per day (at 1000W/m2) Example : Annual energy consumption of the load = 9125 kWh/year = 25 kWh/day Let’s say 50% of energy consumption will be provided by PV PV system energy output = 12.5 kWh/day Now determine the number of peak sun hours available per day at the installation location. There are two ways of doing this…

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