Stafford Hill Solar Hybrid — United States of America

Stafford Hill Solar Hybrid is a 4 MW storage power plant in Vermont, United States of America. It is operated by Green Mountain Power Corp. Based on reported annual generation of 2 GWh, it can supply roughly 542 homes. It ranks #7622 of 10,884 United States of America power plants by installed capacity. Commissioned in 2015, it is around 11 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0060518.

Data provenance

Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.

capacity: WRI GPPD; fuel: WRI GPPD

In context: how this plant compares

At 4 MW, Stafford Hill Solar Hybrid is around the median storage plant in United States of America (4 MW). This facility converts its energy source into electricity for the grid; its capacity, fuel type and location determine its role in the national power mix.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

Key facts

Load factor

5%, from 2 GWh of reported generation; the median for 12 storage plants in United States of America that report generation is 4%

Share of United States of America storage capacity

0.5% of 815 MW across 104 plants in this dataset

Age among peers

21 of 104 dated storage plants in United States of America are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Reported generation trend

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Green Mountain Power Corp. All plants by this company →

Local climate & thermal context

This storage plant stores and releases electricity (pumped-hydro or batteries) to balance the grid. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 43.6°N — which shapes how much energy it can produce and how its output varies through the year.

Monthly mean temperature

Heating degree-days here run 78% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 89/100 — this site sits in the top third of the power plants we cover by heating degree-days.

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

Site climate & environmental severity

This site sits in a mild atmospheric environment (estimated ISO 9223 class C2 — Low), with thermal cycling the leading environmental stress.

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby plants

The #51 largest storage power plant of 104 in United States of America by capacity.

United States of America has 104 storage power plants in this dataset, together about 815 MW of capacity.

Nearby power plants

• Main Street Solar Project · Solar · 1.5 MW · Vermont
• Glen · Hydro · 2 MW · Vermont
• Cold River Road Solar · Solar · 2.3 MW · Vermont
• Rutland · Oil · 13.2 MW · Vermont
• Proctor · Hydro · 6.9 MW · Vermont
• Pittsford · Hydro · 3.6 MW · Vermont

Location

Coordinates 43.6194, -72.9503 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions