Bifacial PV + Battery Backup for 5,000 BF and 15,000 BF Global Energy Container Kilns
Both kilns run continuously. Daily energy = constant kW load × 24 hours.
Array sized so that 4 sun-hours/day, after derate and bifacial gain, produces the full 24-hour kiln energy need. Panels round up to full pallets (31 panels/pallet).
Battery covers the 20 non-solar hours/day at full kiln load only — no extra multi-day reserve, per spec. Sized to LiFePO4 at 90% usable depth of discharge.
Panel cost from vendor quote; balance-of-system (mounting, wiring, combiner, charge controller, inverter, battery, powerhouse container, monitoring) priced at typical 2026 commercial off-grid rates. Get formal quotes to firm these up.
| Component | Cost |
|---|---|
| PV panels (3 pallets, 93 × 595W) | $21,027 |
| Mounting structure | $11,067 |
| Wiring | $2,767 |
| Combiner box / disconnects | $2,213 |
| Charge controller | $2,767 |
| Inverter (10 kW) | $5,000 |
| Battery storage (≈178 kWh) | $48,889 |
| 20 ft powerhouse container | $12,000 |
| Monitoring system | $2,500 |
| Total System Cost | $108,230 |
| Component | Cost |
|---|---|
| PV panels (7 pallets, 217 × 595W) | $49,064 |
| Mounting structure | $25,823 |
| Wiring | $6,456 |
| Combiner box / disconnects | $5,165 |
| Charge controller | $6,456 |
| Inverter (22.5 kW) | $11,250 |
| Battery storage (≈400 kWh) | $110,000 |
| 20 ft powerhouse container | $15,000 |
| Monitoring system | $2,500 |
| Total System Cost | $231,713 |
Savings = grid cost fully avoided, since solar is assumed available 365 days/yr at the stated 4-hour average. Simple payback = Total System Cost ÷ Annual Savings (no financing, incentives, or O&M included).
| Metric | 5,000 BF Kiln | 15,000 BF Kiln |
|---|---|---|
| Continuous load | 8 kW | 18 kW |
| Daily energy demand | 192 kWh | 432 kWh |
| Installed PV array | 55.3 kW (93 panels / 3 pallets) | 129.1 kW (217 panels / 7 pallets) |
| Battery storage (nominal) | ≈178 kWh | ≈400 kWh |
| Total system cost | $108,230 | $231,713 |
| Annual grid cost avoided | $10,512 | $23,652 |
| 25-yr avoided grid cost | $262,800 | $591,300 |
| Simple payback | 10.3 years | 9.8 years |
Both kilns pay back within a typical 25–30 year PV system lifespan and LiFePO4 battery cycle life (with a mid-life battery augmentation/replacement likely around year 10–12). The larger 15,000 BF kiln pays back modestly faster because BOS and container costs scale sub-linearly against a larger, more efficient array footprint. Bifacial gain from the white crushed rock and white container wall meaningfully reduces the required panel count for both systems — without it, roughly 13% more panels/pallets would be needed to hit the same output.
| CONTACT TEL: 608-238-6001 Email: greg@globalmicroturbine.com | AMP | PDF |