BESS Sizing Calculator Report
1. Input Parameters
Customer Load: 2.5 MW
Discharge Duration: 4.0 hours
C-Rate: 0.5C
Grid Power Available: 2.0 MW
Solar Power Available: 1.0 MW
Other Power Available: 0.0 MW
Project Application: Peak Shaving
Ambient Environment: Inland
Voltage Standard: 11.0 kV
Grid Stability: Stable
Cooling System: Liquid Cooling System
Cycles per Day: 1
Black Start Required: No
Depth of Discharge: 90.0%
Static Efficiency: 90.0%
Cycle Efficiency: 95.0%
Power Factor: 0.95
Aging Derate: 5.0%
Temperature Derate: 3.0%
Auxiliary Load: 2.0%
Charging C-Rate: 0.5C
Cable Length: 50.0 m
Site Preparation Cost: $50,000.00
2. Calculation Results
Battery Sizing Calculations:
Initial Battery Capacity 10.0 MWh Customer Load × Discharge Duration
After DoD Adjustment 11.11 MWh Initial Capacity ÷ (DoD %)
After Static Efficiency 12.35 MWh After DoD ÷ Static Efficiency
After Cycle Efficiency 13.0 MWh After Static Eff ÷ Cycle Efficiency
After Derating Factors 14.39 MWh After Cycle Eff ÷ Derating Factors
Required Discharging Power 2.5 MW Customer Load
Battery Size Based on C-Rate 5.0 MW Required Power ÷ C-Rate
Battery Size Sufficient Yes
Required Battery Capacity 14.39 MWh Final calculated capacity
Charging Calculations:
Power Available for Charging 3.0 MW Grid + Solar + Other Power
Time to Fully Charge 5.7 hours Battery Capacity ÷ Charging Power ÷ Efficiency
3. Bill of Quantity (BOQ)
Component Model Quantity
Battery System BESS-3727 4
Power Conversion System PCS-10MW 1
Transformer TX-8MVA 1
Switchgear/RMU SG-11kV-RMU 1
AC System Cabinet AC-CAB-S 1
EMS & SCADA System EMS-ADV 1
Containerization CONT-20FT 4
Cabling CAB-MV 50.0m
Fire Protection FIRE-FM200 1
Battery System Details:
Model: BESS-3727
Quantity: 4
Capacity per Unit: 3727.36 kWh
Total Capacity: 14.91 MWh
Chemistry: NMC
Cycle Life: 5000 cycles
Warranty: 10 years
PCS Details:
Model: PCS-10MW
Quantity: 1
Power per Unit: 10.0 MW
Efficiency: 98.0%
Cooling Type: Liquid
Transformer Details:
Model: TX-8MVA
Quantity: 1
Power per Unit: 8.0 MVA
Type: Oil-Filled
Primary Voltage: 0.69 kV
Secondary Voltage: 11.0 kV
Configuration: Step-Up Transformer
Losses: 2.3%
Impedance: 6.5%
Mounting: Pad Mounted
Switchgear Details:
Model: SG-11kV-RMU
Quantity: 1
Voltage Rating: 11 kV
Type: RMU
Current Rating: 630 A
Breaking Capacity: 25 kA
EMS/SCADA Details:
Model: EMS-ADV
Features: Monitoring, Control, Forecasting
Hardware: Redundant Servers
Software: Advanced Analytics
Container Details:
Model: CONT-20FT
Quantity: 4
Dimensions: 6.1x2.4x2.6m
4. Cost Breakdown
Equipment Cost: $7,242,870.40
Site Preparation: $50,000.00
Engineering & Design: $724,287.04
Contingency: $1,202,573.62
Total Project Cost: $9,219,731.06
5. Financial Analysis
Total Project Cost: $9,219,731.06
Daily Energy: 10,000.00 kWh
Daily Energy Revenue: $1,500.00
Annual Energy Revenue: $450,000.00
Capacity Revenue: $250,000.00
Annual Revenue: $700,000.00
Payback Period: 13.2 years
Levelized Cost of Storage: $0.1998/kWh
Net Present Value (NPV): $-2,347,027.87
Approximate IRR: 7.59%
System Lifecycle: 16.7 years
Annual Degradation: 2.5%
Maintenance Costs:
Annual Maintenance: $138,295.97
Battery Replacement (Year): Year 10.0
Battery Replacement Cost: $2,765,919.32
Major Maintenance (Year): Year 8.3
Major Maintenance Cost: $921,973.11
Transportation Logistics:
Battery Weight: 108,000.00 kg
Container Weight: 12,000.00 kg
Transformer Weight: 6,000.00 kg
PCS Weight: 4,800.00 kg
Total Weight: 130,800.00 kg (130.80 tons)
Trucks Required: 7
6. Design Recommendations
Design Option Battery Qty PCS Qty Total Cost Payback (Years)
Cost-Optimized Design 1 1 $7,103,550.00 10.1
Base Design 4 1 $9,219,731.06 13.2
High-Efficiency Design 4 1 $9,346,231.06 13.4
LFP Long-Life Design 5 1 $9,456,450.00 13.5
Extended Autonomy Design 2 1 $10,139,550.00 14.5
Modular Scalable Design 15 4 $12,492,450.00 17.8
Option 1: Cost-Optimized Design
20% reduced battery capacity for lower initial investment, suitable for applications with shorter
backup requirements.
Option 2: Base Design
Optimized design based on your requirements with best balance of cost and performance.
Option 3: High-Efficiency Design
Premium components with higher efficiency and advanced EMS for optimal performance and
monitoring.
Option 4: LFP Long-Life Design
LFP battery chemistry for enhanced safety and longer cycle life (6000+ cycles), ideal for daily
cycling applications.
Option 5: Extended Autonomy Design
20% additional battery capacity for extended backup time and improved cycle life.
Option 6: Modular Scalable Design
Modular design with smaller units for easier expansion and redundancy, suitable for phased
implementation.
Recommended Design:
For the best return on investment, we recommend the Cost-Optimized Design with a payback period
of 10.1 years. This option provides the optimal balance between initial investment and long-term
financial returns.
7. Additional Considerations
1. Site preparation may require additional civil works depending on soil conditions and local
regulations.
2. Grid connection approval from the local utility may be required and could involve additional
costs.
3. Environmental permits may be necessary, especially for larger installations.
4. Regular maintenance is essential for optimal system performance and longevity.
5. Consider future expansion possibilities when designing the layout and electrical infrastructure.
6. Training for operations and maintenance staff should be included in the project planning.
Report generated on 2025-08-26 09:24:17
