Hospital Net Zero

Solar PV yield and carbon offset

Estimate annual solar output, bill savings and avoided carbon for a rooftop or ground array.

What this page is: one calculator that runs in your browser and stores nothing. Sources and limits are on the calculators page; for a linked 42-sheet model use the engineering toolkit.

Solar PV yield and carbon offset20+ year view
About this tool

What it does: Estimates solar output, bill savings and carbon avoided against hospital demand.

Background: Uses a specific yield (kWh per kWdc) with annual degradation.

Benefit: Shows whether a system is sensibly sized for the hospital.

Take this from NREL PVWatts for your site (AC output ÷ DC size).
Planning value. Use your module warranty.
eGRID2023 national: 0.348 kg/kWh generation-point.

Year-t energy = kWdc × yield × (1 − degradation)^(t−1). Offset assumes all PV output is used on site. Yield source: NREL PVWatts. Not a design or interconnection study.

Planning estimate, not engineering design or professional advice. Results depend on your inputs and published factors, and are not a verified inventory, audit, guarantee of savings or net-zero claim. See the terms of use.

Independent planning estimate using published US government factors. Not endorsed by DOE, EPA, NREL or any agency. Not an audit or a verified inventory. See methods.