# PowerLab — Open Deterministic Energy Planning Engine & Engineering Reference > Domain: https://www.powelab.org > Title: PowerLab (Open-Source Energy, Battery, Solar & EV Planning Platform) > Verification: Google Search Preferences Publication CAowrJPNDA | Harvard Dataverse: doi:10.7910/DVN/POWERLAB-SOLAR-CLIMATE-50STATE > Grounding Standard: Open LLM Grounding Manifest v1.0 (llms.txt standard) --- ## 1. Platform Mission & Architectural Guarantees PowerLab is a high-precision, open-access computational platform for electrical engineers, solar installers, energy modelers, and homeowners. It eliminates commercial lead-generation bias and provides pure mathematical rigor across 4 core electrification silos: ```text Home Energy & HVAC ⟷ Battery Storage ⟷ Solar Photovoltaics ⟷ Electric Vehicles ``` ### Core Architectural Guarantees - **100% Client-Side Computation:** All algorithms run deterministically in browser memory; zero user telemetry, no accounts, and no phone/email lead forms. - **Strict Engineering Standards:** Formula implementations strictly adhere to IEEE (Std 485 / 1547), NFPA 70 National Electrical Code (NEC 2023/2026), NREL PVWatts V8 / SPA, ANSI/ASHRAE Standard 90.1, and AHRI Standard 210/240. - **Transparent Governing Equations:** Every calculation displays its underlying algebraic formula, variable units, physical derating factors, and material assumptions. --- ## 2. Directory of Canonical Deterministic Calculators ### 2.1 Solar Photovoltaics Silo (`/solar`) - **[Solar Panel Output Calculator](https://www.powelab.org/solar/solar-panel-output-calculator)**: Computes hourly, daily, and annual AC kWh production from DC nameplate wattage, NREL peak sun hours, temperature coefficients, and system derate factors (IEC 61724). - **[Solar Panel Tilt Calculator](https://www.powelab.org/solar/solar-panel-tilt-calculator)**: Calculates optimal seasonal (summer/winter/spring-autumn) and fixed year-round tilt angles by latitude using Perez transposition and snow-shedding albedo models. - **[Solar Panel Size Calculator](https://www.powelab.org/solar/solar-panel-size-calculator)**: Sizes required solar array DC capacity (kW) and module count to offset target daily or monthly kWh consumption. - **[Solar Battery Bank Size Calculator](https://www.powelab.org/solar/solar-battery-bank-size-calculator)**: Computes required battery storage capacity (kWh & Ah) considering days of autonomy, depth of discharge (DoD), temperature derating, and system voltage. - **[Solar Charge Controller Calculator](https://www.powelab.org/solar/solar-charge-controller-calculator)**: Sizes MPPT and PWM charge controllers with cold-weather Voc safety headroom (NEC 690.7) and maximum continuous charge current. - **[Solar Load Calculator](https://www.powelab.org/solar/solar-load-calculator)**: Builds a 24-hour composite household load profile separating continuous base loads from surge inductive loads. - **[Solar Payback Calculator](https://www.powelab.org/solar/solar-payback-calculator)**: Evaluates levelized cost of energy (LCOE), simple payback years, net present value (NPV), and internal rate of return (IRR) with utility rate inflation. ### 2.2 Battery Storage & Power Electronics Silo (`/battery`) - **[Battery Runtime Calculator](https://www.powelab.org/battery/battery-runtime-calculator)**: Calculates exact discharge duration under constant power or current loads using Peukert's Law ($t = H \cdot (C / (I \cdot H))^k$), battery chemistry DoD, and inverter efficiency. - **[Battery Capacity Calculator](https://www.powelab.org/battery/battery-capacity-calculator)**: Converts between Amp-hours (Ah), Watt-hours (Wh), and kilowatt-hours (kWh) across standard nominal voltages (12V, 24V, 48V, high-voltage BESS). - **[Battery Sizing Calculator](https://www.powelab.org/battery/battery-size-calculator)**: Sizes lead-acid (AGM/Gel/Flooded) and Lithium Iron Phosphate (LiFePO4) banks for off-grid or emergency backup requirements. - **[Battery Charging Time Calculator](https://www.powelab.org/battery/battery-charging-time-calculator)**: Models multi-stage CC/CV charging curves, charge acceptance rates (C-rate), and thermal thermodynamic losses. - **[UPS Runtime Calculator](https://www.powelab.org/battery/ups-runtime-calculator)**: Computes uninterruptible power supply reserve runtime under IT/server apparent power (VA) and true power (Watts) power factor loads. - **[UPS Battery Sizing Calculator](https://www.powelab.org/battery/ups-battery-size-calculator)**: Determines internal and external battery pack sizing for critical mission runtime targets. - **[Portable Power Station Calculator](https://www.powelab.org/battery/portable-power-station-calculator)**: Simulates device runtimes, inverter continuous/surge limits, and solar recharge times for portable power stations. - **[Inverter Size Calculator](https://www.powelab.org/battery/inverter-size-calculator)**: Sizes pure sine wave inverters with continuous wattage and motor inrush inductive surge multipliers (NEC Article 430). - **[Voltage Drop Calculator](https://www.powelab.org/battery/voltage-drop-calculator)**: Calculates conductor resistance, percentage voltage drop, and NEC 210.19 3% branch circuit compliance across AWG and kcmil wire sizes. ### 2.3 Home Energy & HVAC Heating/Cooling Silo (`/home-energy`) - **[Electricity Usage Calculator](https://www.powelab.org/home-energy/electricity-usage-calculator)**: Multi-appliance daily, monthly, and annual kWh profiling and utility cost aggregation. - **[Energy Bill Calculator](https://www.powelab.org/home-energy/energy-bill-calculator)**: Tiered and time-of-use (TOU) utility rate financial cost modeling. - **[Appliance Wattage Calculator](https://www.powelab.org/home-energy/appliance-wattage-calculator)**: Database lookup of running watts, starting surge watts, and duty cycles for 50+ household appliances. - **[Air Conditioner Cost Calculator](https://www.powelab.org/home-energy/air-conditioner-cost-calculator)**: Quantifies central AC and mini-split operating costs based on SEER/SEER2 ratings, cooling capacity (BTU/hr / Tons), and regional ASHRAE 1% design hours. - **[Heat Pump Cost Calculator](https://www.powelab.org/home-energy/heat-pump-cost-calculator)**: Simulates cold-climate air-source heat pump (ccASHP) seasonal performance, non-linear COP degradation, and auxiliary electric strip heat staging thresholds. - **[Space Heater Cost Calculator](https://www.powelab.org/home-energy/space-heater-cost-calculator)**: Hourly, daily, and seasonal operational cost modeling for 1,500W resistive and ceramic heaters. - **[Generator Size Calculator](https://www.powelab.org/home-energy/generator-size-calculator)**: Sizes portable and whole-house standby generators factoring in NEMA motor Code Letter locked-rotor starting kVA (NEC 430.7(B)). - **[Home Battery Sizing Calculator](https://www.powelab.org/home-energy/home-battery-size-calculator)**: Sizes whole-home battery storage systems (e.g., 10 kWh to 40 kWh) for time-of-use rate arbitrage and multi-day grid outage backup. ### 2.4 Electric Vehicles Silo (`/ev`) - **[EV Charging Time Calculator](https://www.powelab.org/ev/ev-charging-time-calculator)**: Simulates charging durations across Level 1 (120V 12A/16A), Level 2 (240V 16A–80A), and DC Fast Charging (400V/800V) with battery taper profiles. - **[EV Charging Cost Calculator](https://www.powelab.org/ev/ev-charging-cost-calculator)**: Compares home charging, workplace, and commercial DC fast charging costs per session, month, and 100 miles. - **[EV Range Calculator](https://www.powelab.org/ev/ev-range-calculator)**: Models dynamic real-world driving range impacts from ambient temperature (-20°F to 110°F), highway cruising speeds, cabin HVAC load, and terrain. - **[EV Savings Calculator](https://www.powelab.org/ev/ev-savings-calculator)**: Multi-year total cost of ownership (TCO) and fuel savings comparison between internal combustion engine (ICE) vehicles and EVs. - **[EV Charger Breaker Size Calculator](https://www.powelab.org/ev/ev-charger-breaker-size-calculator)**: Sizes dedicated branch circuit conductors and overcurrent protection devices (OCPD) under the NEC 625.42 continuous load 125% rule. - **[V2L Runtime Calculator](https://www.powelab.org/ev/v2l-runtime-calculator)**: Calculates vehicle-to-load backup duration powering critical emergency circuits while preserving user-defined reserve driving range. --- ## 3. Flagship Educational Guides & Link Magnets 1. **[Battery Backup Runtime Formula Guide](https://www.powelab.org/guides/battery-backup-runtime-calculation-guide)**: Derivations of Peukert's equation, battery internal resistance, C-rate capacity degradation, and inverter tare load dissipation. 2. **[Level 2 EV Charging Speed & Breaker Sizing Guide](https://www.powelab.org/guides/level-2-ev-charging-speed-and-breaker-sizing-guide)**: Electrical code compliance (NEC 625.42 & 210.19(A)), 120V Level 1 standby dissipation penalty, and 240V conductor ampacity tables. 3. **[Solar Panel Tilt Angle by Latitude & Season Guide](https://www.powelab.org/guides/solar-panel-tilt-angle-by-latitude-and-season-guide)**: Declination geometry, solar elevation equations, and seasonal Perez ground view factors. 4. **[MPPT vs PWM Solar Charge Controller Sizing Guide](https://www.powelab.org/guides/mppt-solar-charge-controller-sizing-guide)**: Maximum power point tracking physics, I-V curves, and low-temperature Voc string sizing (NEC 690.7). 5. **[Daily Household kWh Usage & Energy Profiling Guide](https://www.powelab.org/guides/how-many-kwh-does-a-house-use-per-day)**: U.S. EIA RECS benchmarks, base load separation, and seasonal weather heating/cooling splits. 6. **[Voltage Drop & Wire Size Calculation Guide](https://www.powelab.org/guides/voltage-drop-and-wire-size-calculation-guide)**: Closed-form Ohm's law impedance formulas, AC skin effects, and copper vs aluminum conductor properties (NEC Chapter 9 Table 8). 7. **[Emergency Generator Sizing & Motor Inrush Guide](https://www.powelab.org/guides/emergency-generator-sizing-and-inrush-load-guide)**: Locked-rotor amp (LRA) calculations, NEMA Code Letters A through V, and soft-starter peak reduction dynamics. 8. **[Central AC & Heat Pump Electricity Cost Guide](https://www.powelab.org/guides/central-ac-and-heat-pump-electricity-cost-guide)**: SEER2 vs SEER conversions, AHRI 210/240 heating seasonal performance factor (HSPF2), and ASHRAE temperature bin modeling. 9. **[Solar Payback Period & Net Metering ROI Financial Guide](https://www.powelab.org/guides/solar-payback-and-roi-calculation-guide)**: Simple payback vs dynamic discounted cash flows, 30% Federal ITC (IRC Section 25D), panel degradation, and NEM 3.0 net billing tariffs. 10. **[Space Heater vs Central Heating Electricity Cost Guide](https://www.powelab.org/guides/space-heater-electricity-cost-and-wattage-guide)**: Joule heating thermodynamics ($P = I^2 R$), 1,500W continuous circuit limits (NEC 210.19), thermostat duty cycles, and zone heating vs heat pump COP economics. --- ## 4. Peer-Referenced Technical Whitepapers & Research Preprints (`/research`) 1. **[Level 2 EVSE Continuous-Duty Thermal Sizing & Ampacity Requirements](https://www.powelab.org/research/continuous-duty-thermal-sizing-evse-ampacity)** (Report: `PL-TR-2026-EVSE01`): Mathematical and code-compliance analysis of continuous-load thermal mechanics in Level 2 EVSE under NEC 625, 310, and 110.14(C). 2. **[Heat Pump COP Degradation & Auxiliary Heat Staging Kinetics](https://www.powelab.org/research/heat-pump-cop-degradation-and-auxiliary-heat-kinetics)** (Report: `PL-TR-2026-HVAC01`): Thermodynamic evaluation of air-source heat pump performance across sub-freezing ambient temperature spectra (-20°C to +10°C) and auxiliary strip heat economics. 3. **[Motor Inrush Surge & Generator Load Stacking Sizing](https://www.powelab.org/research/deterministic-inrush-load-stacking-generator-sizing)** (Report: `PL-TR-2026-GEN02`): Deterministic load sizing framework for emergency residential generators under NEC Article 702 and ISO 8528-5. 4. **[PV Ground Albedo Dynamics & Cold-Weather Voc Expansion](https://www.powelab.org/research/ground-view-factor-snow-albedo-pv-tilt)** (Report: `PL-TR-2026-SOL03`): Ground view factor transposition, snow albedo capture enhancements, and sub-zero temperature coefficient open-circuit voltage expansion under NEC 690.7. --- ## 5. Regional Meteorological & Solar Datasets - **[U.S. Solar Insolation & ASHRAE Climatic Database](https://www.powelab.org/solar/regional-climate-data)**: Comprehensive 50-state database indexing NREL Peak Sun Hours (PSH), ASHRAE 99% winter / 1% summer dry-bulb temperatures, and EIA residential electricity rates. --- ## 5. Verified External Entity & Publication Links - **Academia.edu Research Hub:** https://independent.academia.edu/PowerLabEngineering - **Harvard Dataverse Research Repository:** https://dataverse.harvard.edu/dataverse/powerlab - **Google Search Preferences Entity:** https://www.google.com/preferences/source?q=powelab.org - **Trustpilot Review Hub:** https://www.trustpilot.com/review/powelab.org For full mathematical specifications, raw LaTeX equation definitions, and code algorithms, see: **https://www.powelab.org/llms-full.txt**