Battery C-Rate & Cycle Life Calculator
Calculate battery charge and discharge current (Amps) from C-rate, time to cut-off voltage, and multi-year cycle life degradation based on Depth of Discharge.
Battery Energy Storage System (BESS) LCOS & Sizing Calculator
Calculate utility-scale Battery Energy Storage System (BESS) Levelized Cost of Storage (LCOS), C-rate, round-trip efficiency, degradation, CapEx, OpEx.
Battery Life, Runtime & Peukert’s Law Calculator
Calculate battery runtime, effective capacity under Peukert. Fast, free, and secure client-side execution in your browser.
Bifacial Solar Gain Calculator
Calculate energy gain percentage and extra annual kWh production from bifacial solar panels based on ground surface albedo, clearance height, and bifaciality.
Biomass & Wood Pellet Heating Calculator
Calculate wood pellet and cordwood fuel consumption, heating energy output, moisture content penalties, and cost per million BTU ($/MMBTU) compared to fossil fuels.
Commercial Solar ROI Calculator
Model commercial & industrial solar project economics including Federal Section 48 ITC, MACRS 5-year accelerated depreciation tax shelter, and NPV.
Compressed Hydrogen Storage Tank Density Calculator
Calculate real gas compressibility Z(P,T), hydrogen storage density, tank capacity, and gravimetric storage weight for 350 bar and 700 bar Type I to Type IV.
EV Solar Charging Calculator
Calculate the number of solar panels, array kW capacity, daily kWh generation, and annual cost savings needed to charge an electric vehicle on solar power.
Geothermal Heat Pump Sizing Calculator
Estimate ground-source heat pump (GSHP) cooling/heating tonnage, vertical borehole depth, horizontal loop trench length, and annual energy cost savings.
Ground Source Heat Pump & Geothermal Borehole Calculator
Calculate ground source heat pump (GSHP) vertical geothermal borehole length, ground thermal load extraction and rejection, borehole thermal resistance, and long-term ground thermal balance.
Heat Pump COP Calculator
Calculate heat pump Coefficient of Performance (COP), HSPF2, SEER2, heating cost per million BTU ($/MMBtu), and annual savings over gas furnaces.
Hydroelectric Power Calculator
Calculate micro-hydro and small hydroelectric power output in watts and kWh, hydrostatic water pressure (PSI), effective net head, and annual energy production.
LCOE Calculator
Calculate the Levelized Cost of Electricity ($/MWh and $/kWh) for solar PV, wind, battery, and hybrid energy systems using capital expenditures, O&M, and discount rates.
Levelized Cost of Hydrogen (LCOH) Electrolyzer Calculator
Calculate Levelized Cost of Hydrogen (LCOH) in $/kg H2. Analyze CAPEX, renewable electricity tariff, stack replacement, capacity factor, and Inflation Reduction Act 45V clean hydrogen tax credits.
Microgrid Solar, Battery & Diesel Dispatch Optimizer
Simulate 24-hour hybrid microgrid energy dispatch, solar PV generation, battery BESS SoC dynamics, diesel generator fuel consumption, LCOE, and CO2 emissions.
Net Metering Calculator
Calculate solar Net Energy Metering (NEM 1.0/2.0/3.0) financial credits, monthly grid export compensation, non-bypassable charges, and true-up balances.
Off-Grid Solar Calculator
Plan complete off-grid solar systems: 24h watt-hour load audit, battery bank capacity (Ah/kWh), PV solar array wattage, and generator runtime.
Photovoltaic Single-Diode I-V Curve Calculator
Calculate solar cell I-V and P-V curves, Maximum Power Point (MPP), Fill Factor, series/shunt resistance impacts, and temperature effects using the 5-parameter diode model.
RV Solar Calculator
Calculate RV solar panel wattage, 12V/24V LiFePO4 battery bank amp-hours (Ah), daily appliance watt-hours, and DC-to-DC alternator charging times for vans.
Solar Angle Calculator
Calculate optimal solar panel tilt angle and azimuth orientation by latitude, seasonal summer/winter adjustments, and solar elevation noon angles.
Solar Array Shading & Bypass Diode Mismatch Calculator
Calculate solar array partial shading power losses, multi-peak P-V curves, global vs local MPPT peaks, bypass diode conduction, and hot-spot heating risk.
Solar Azimuth & Sun Path Calculator
Calculate solar azimuth angle, solar elevation/zenith angle, solar noon time, and day length for any latitude and day of the year using astronomical algorithms.
Solar Battery Round-Trip Efficiency Calculator
Calculate AC-coupled vs DC-coupled solar battery round-trip efficiency (RTE), electrochemical cell losses, inverter rectification penalties, and lifetime loss cost.
Solar Battery Storage Calculator
Size lithium LiFePO4 solar batteries for home energy storage, critical backup circuits, days of autonomy, and peak time-of-use (TOU) arbitrage.
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