storage · Storage
Callisto II Energy Center (Unit CALII)
Harris, TX
Developer: Callisto II Energy Center LLC (IPP Non-CHP)
Capacity
400 MW
Waiting
—
Stage
Under construction
Verification
Verified (primary source)
Grid region
ERCO
Equipment
Battery storage
Expected online
Nov 2026*
* Approximate / developer-estimated date, not a firm commitment.
Estimated investment waiting
$526.4M
≈ 400,000 kW × $1,316/kW typical overnight construction cost (EIA) — the dollar value of the power plant itself sitting in permitting limbo, not a bill estimate. Full methodology.
Location
29.6453, -95.4502 — see the map for this project in context with others.
Public Hearings
Unknown
Hearing details: Unknown
Not available from this project’s data source yet. Check the sources below directly.
Sources
Data quality note: No application-filed date is published by EIA-860M, so days/years waiting cannot be computed until one is added via manual override — only a planned operation date (11/2026) is available.