How does Heartland determine the “appropriate size” for solar or wind?

Heartland uses the formula for "appropriately sized" found in Kansas law and shown below.

When plugging in your annual kWh used, we look at your actual electric use over the past 12 months. If you’re new, we estimate based on the square footage of conditioned space (7.15 kWh per square foot per year).

For existing locations: 

Max Export (kW)=Annual kWh/8760 divided by 0.288

For new locations:

Max Export (kW)=7.15×Conditioned SqFt/8760​÷0.288

The result, rounded up, is the maximum system size we can approve for export.