Twin Long Mirror — 20 ft standard DC block
Two long pairs mirrored around a central skid spine, sharing one aisle — four DC blocks and two skids per section
Overview
Two long DC pairs mirrored around a central skid spine. Each pair contributes one PCS & MV skid; the two skids sit back-to-back in the center, sharing one service aisle. Cable ends face the skids by default.
| Parameter | Value |
|---|---|
| DC blocks | 4 × 20 ft (two long pairs) |
| PCS & MV skids | 2 × 40 ft @2h · 20 ft @4h |
| Section height | 5.1 m (16.7 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 inward to its adjacent PCS skid. At 40 ft each skid has two PCS sections — one per block in the pair.
Single BESS section footprint
Land area at default clearance. When cable ends face the central skid spine, their clearance overlaps with the skid zone — no extra width on those sides.
Cable-end clearance shared with skid zone
149.3 × 39.6 ft
Cable-end clearance extends outward
162.4 × 39.6 ft
| Land use | Cable inward | Cable outward |
|---|---|---|
| Footprint | 45.5 × 12.1 m (149.3 × 39.6 ft) | 49.5 × 12.1 m (162.4 × 39.6 ft) |
| Total area | 549 m² (5,914 ft²) | 598 m² (6,434 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
646.3 × 39.6 ft
4 sections · 16 DC blocks
315.0 × 72.7 ft