400 MW BESS site layout
What a 400 MW battery storage site looks like: real layouts generated by the SiteLayout.ai solver at 2-hour and 4-hour duration, with the land and equipment figures they imply.
400 MW / 1,600 MWh — 4-hour duration
Actual solver output: 151 × 126 m site, perimeter ring road, default spacing rules, cabling routed to the Point of Interconnection (POI).
400 MW / 800 MWh — 2-hour duration
Actual solver output: 126 × 75 m site, perimeter ring road, default spacing rules, cabling routed to the Point of Interconnection (POI).
Frequently asked questions
How much land does a 400 MW BESS need?
At 4-hour duration (1,600 MWh), the fenced equipment area is 4.7 acres (1.91 ha); at 2-hour duration (800 MWh), 2.3 acres. Both figures come from the layouts on this page — real solves with 6.25 MWh DC blocks, a perimeter ring road, 5 m safety distance between DC clusters, and a 1.5 m boundary setback. Add land for the HV substation, laydown, and stormwater.
How many DC blocks does a 400 MW BESS use?
256 DC blocks (6.25 MWh, 20 ft) at 4-hour duration, 128 at 2-hour. The 4-hour build pairs them with 64 PCS & MV skids, the 2-hour build with 32 — one skid per DC cluster, following the solver's Auto pairing rule.
What E-house does a 400 MW site take?
Large walk-in (Big prefab · >100 MW). The format is set by site power: 20 ft up to 50 MW, 40 ft up to 100 MW, and a 15 × 4 m walk-in building above 100 MW.
Are these real layouts?
Yes. Every image on this page is unmodified output from the SiteLayout.ai solver on a site sized to the target capacity, with default spacing and road rules. The same solver runs in the layout tool on any boundary you draw.
Why does the 2-hour version need less land?
Land tracks energy, not power. A 2-hour system stores half the MWh of a 4-hour system at the same MW, so it uses roughly half the DC blocks and roughly half the area.
Related
These are reference sites. For the real 400 MW project, draw the boundary in the layout tool and the same solver packs the actual site.
Start a layout