Twin Short Mirror — 20 ft standard DC block
Two short pairs mirrored around central skids — four DC blocks and two vertical skids per section
Overview
Two end-to-end DC pairs mirrored around central skids. Each pair contributes one vertical PCS & MV skid; the two skids sit back-to-back in the center. Only the aisle is shared, never the skid.
| Parameter | Value |
|---|---|
| DC blocks | 4 × 20 ft (two short pairs) |
| PCS & MV skids | 2 × 40 ft @2h · 20 ft @4h |
| Section width | 12.3 m (40.4 ft) |
Energy capacity
Section energy and power rating for this configuration.
| DC block | BESS section (4 blocks) | Duration |
|---|---|---|
| 6.25 MWh | 25 MWh / 12.5 MW | 2h |
| 6.25 MWh | 25 MWh / 6.25 MW | 4h |
Clearance and spacing defaults
Service clearance and spacing used by default. All values are adjustable in BESSLayout.
| Setting | Default |
|---|---|
| DC block door side | 3.5 m (11.5 ft) |
| DC block cable end | 2 m (6.6 ft) |
| PCS & MV skid | 3 m (9.8 ft) all sides |
| Fire separation (between DC blocks of different sections) | 5 m (16.4 ft) |
Cable layout
Each DC block cables from its outward-facing cable end to the adjacent skid below or above. At 40 ft each skid has two PCS sections — one per block in the pair.
Single BESS section footprint
Land area at default clearance. Door clearance on the top and bottom (outward-facing doors), cable-end clearance on each side.
Skids in center, DC block doors top and bottom
53.5 × 151.8 ft
| Land use | Value |
|---|---|
| Footprint | 16.3 × 46.3 m (53.5 × 151.8 ft) |
| Total area | 755 m² (8,124 ft²) |
Multiple BESS sections footprint
Land area for four sections, in a row and in a 2 × 2 grid, at the default spacing.
4 sections · 16 DC blocks
224.0 × 151.8 ft
4 sections · 16 DC blocks
110.3 × 297.0 ft