# William F Wyman Hybrid

ISO-NE asset profile · https://askthegrid.com/assets/facilities/william-f-wyman-hybrid

Four oil-fired units plus the separately interconnected Casco Bay battery

William F. Wyman is a hybrid EIA plant in Yarmouth, Maine: four petroleum-fired units total 846.0 MW nameplate and the separate Casco Bay battery adds 16.7 MW gross.

## Profile

- **Plant and battery scope:** The 862.7 MW plant total comprises 846.0 MW of petroleum generation and 16.7 MW of battery capacity. The available records do not report the battery's storage energy or duration.

## Metrics

- **Plant nameplate:** 862.7 MW — 846.0 MW petroleum generation plus 16.7 MW battery storage.
- **Battery power:** 16.7 MW gross — 16.2 MW net summer and winter.

## Facts

- **ISO-NE queue:** 575 — Casco Bay Energy Storage · confidence: high
- **Battery POI:** Wyman Station 115 kV switchyard · confidence: high

## Related parties

- **Transmission owner:** Central Maine Power — Executed interconnection agreement ([source](https://www.iso-ne.com/static-assets/documents/2016/12/er17-581-000.pdf))

## Sources

- [William F. Wyman battery interconnection agreement](https://www.iso-ne.com/static-assets/documents/2016/12/er17-581-000.pdf) — ISO New England / FERC · executed regulatory filing — Exact battery scope, capacities, equipment, and 115 kV point of interconnection.

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Canonical page: https://askthegrid.com/assets/facilities/william-f-wyman-hybrid

Source: Ask the Grid — https://askthegrid.com/