Community Resilience Microgrid
Sample Site · Commercial · Grid Connected
Scenario comparison
Compare alternative design priorities using the same site, load, tariff, reliability, and equipment assumptions.
| Scenario | PV | Wind | Battery | Generator | Renewables | Critical service | Capex | NPV | LCOE | CO₂ reduction |
|---|---|---|---|---|---|---|---|---|---|---|
| Low capital | 282 kW | 0 kW | 2,770 kWh 1,385 kW |
250 kW | 40.8% | 100.000% | $1,974,528 | $-1,454,071 | $0 | 37.3% |
| Minimum lifecycle cost | 390 kW | 0 kW | 4,493 kWh 2,247 kW |
250 kW | 56.5% | 100.000% | $2,860,794 | $-2,203,822 | $0 | 50.5% |
| Balanced Active |
434 kW | 0 kW | 6,000 kWh 3,000 kW |
250 kW | 62.8% | 100.000% | $3,584,344 | $-3,012,682 | $0 | 55.6% |
| High renewable | 585 kW | 0 kW | 6,000 kWh 3,000 kW |
250 kW | 79.3% | 100.000% | $3,736,136 | $-2,651,333 | $0 | 68.2% |
| Maximum resilience | 477 kW | 0 kW | 6,000 kWh 3,000 kW |
500 kW | 69.0% | 100.000% | $3,758,863 | $-3,069,233 | $0 | 60.5% |
Energy and dispatch analysis
First-week hourly dispatch
Monthly energy balance
Annual energy sources
Project cash flow
NPV sensitivity
Monte Carlo NPV distribution
Monte Carlo percentiles
Detailed annual results
| Category | Metric | Result | Interpretation |
|---|---|---|---|
| Energy | Total load | 1,200.0 MWh/year | Modeled demand before any unserved energy. |
| Energy | PV production | 753.6 MWh/year | Synthetic AC-side solar output. |
| Energy | Wind production | 0.0 MWh/year | Output after availability and losses. |
| Energy | Other DER production | 0.0 MWh/year | Hydro, CHP, and fuel-cell output enabled by the user. |
| Storage | Battery charge | 135.6 MWh/year | Energy accepted before charging losses. |
| Storage | Battery discharge | 126.9 MWh/year | Useful energy delivered from storage. |
| Grid | Imported energy | 453.3 MWh/year | Utility energy serving demand. |
| Grid | Exported energy | 0.0 MWh/year | Energy sold under the export constraint. |
| Generator | Generated energy | 0.0 MWh/year | Dispatchable output during modeled outages. |
| Reliability | Unserved energy | 0.000 kWh/year | Demand remaining after all resources. |
| Reliability | Modeled outage hours | 32 hours/year | Events generated from entered outage statistics. |
| Renewables | Curtailed energy | 0.0 MWh/year | Generation not consumed, stored, or exported. |
| Finance | Annual operating cost | $192,316 | Utility charges, maintenance, fuel, and insurance. |
| Finance | Annual project benefit | $77,063 | Energy savings, demand savings, and resilience value. |
| Finance | Benefit-cost ratio | 0.16 | Discounted benefits relative to initial investment. |
| Finance | Battery replacement year | Year 15 | Estimated from calendar and cycle limits. |
| Environment | Project emissions | 255.6 tCO₂e/year | Grid, generator, and simplified lifecycle emissions. |
| Environment | Avoided emissions | 320.4 tCO₂e/year | Difference from the grid-only baseline. |
| Environment | NOx emissions | 0.0 kg/year | Estimated from generator production. |
Formula used
Solar PV capacity
The result is limited by module area, maximum capacity, existing equipment, and the selected scenario.
Battery energy
Battery power is sized separately from critical peak demand, motor starting demand, C-rate, and user power limits.
Generator capacity
The hourly model applies minimum loading, maximum loading, fuel use, battery charging, and outage-only dispatch.
Transformer and inverter
Net present value
Cash flow includes avoided utility costs, operations, fuel, battery replacement, escalation, resilience value, and salvage.
Renewable fraction
How to use this calculator
- Enter annual energy, peak demand, power factor, load growth, motor starting, and profile assumptions.
- Allocate critical, important, and discretionary load tiers for island operation.
- Configure solar, wind, battery, generator, and existing distributed resources.
- Enter utility limits, tariffs, outage statistics, demand charges, export rules, and grid carbon intensity.
- Set islanding duration, reserve, black start, transfer, redundancy, and component failure scenarios.
- Select control architecture, optimization objective, financial assumptions, and uncertainty ranges.
- Press Run sizing and simulation to execute all calculations and hourly dispatch.
- Review validation warnings, scenario comparisons, dispatch charts, costs, emissions, and exports.
Start with the balanced scenario. Compare low-capital, minimum-cost, high-renewable, and maximum-resilience alternatives before refining assumptions.
Included features
Technical sizing
- AC, DC, and hybrid architectures
- Single-phase and three-phase service
- PV module and area calculation
- Wind turbine count
- Battery energy and power sizing
- Generator modular redundancy
- Inverter, transformer, and ATS ratings
- Motor starting and harmonic margins
Operational simulation
- Synthetic hourly load profile
- Hourly solar and wind production
- Battery charging and discharging
- Time-of-use grid purchases
- Export and curtailment
- Grid outage generation
- Critical-load service calculation
- Fuel and cycling estimates
Economics
- Direct and soft costs
- Tax credits and grants
- Fuel and O&M escalation
- Replacement cost
- Simple and discounted payback
- Net present value
- Benefit-cost ratio
- Levelized energy cost
Reporting
- Five scenario comparison
- Validation warnings
- Hourly and monthly charts
- Sensitivity chart
- CSV and JSON export
- Print-to-PDF report
- Browser project storage
- Equipment presets
Model scope and engineering limitations
This application is a preliminary screening and conceptual sizing tool. It does not replace load-flow, short-circuit, protection coordination, grounding, arc-flash, harmonic, dynamic stability, transient, electromagnetic, structural, fire-safety, or detailed interconnection studies.
The annual profiles are synthetic. Detailed design should use validated interval demand, site weather files, manufacturer efficiency maps, generator fuel curves, battery degradation models, forced-outage distributions, and local tariff schedules.
Final ratings must follow local codes, utility requirements, environmental permits, equipment certifications, cybersecurity policies, ventilation requirements, fire protection rules, and qualified engineering review.