Solar Engineering Suite
A complete toolkit for PV designers, EPCs and installers. Size arrays, batteries, wiring and financials in seconds.
All solar engineering calculators
Solar PV System Size
Professional PV sizing from consumption, peak sun hours, performance ratio, module wattage and system type — with panel count, roof area, generation and CO₂ savings.
Number of Panels
Panel count for a target plant capacity.
Roof Area Required
Physical + gross roof area with maintenance corridors.
Annual Energy Yield
Daily / monthly / annual yield from CUF and PR.
Inverter Sizing
Recommend inverter AC rating from PV DC and DC/AC ratio.
Battery Bank Size
Bank Ah + count for autonomy-driven off-grid storage.
Battery Backup Time
Runtime from a battery bank on a given AC/DC load.
Charge Controller Size
MPPT / PWM controller current rating.
DC Cable Sizing
Copper/Aluminium cable size from voltage drop and thermal derating.
Voltage Drop Check
Voltage drop and % for a chosen cable size.
PV String Sizing
Min/max modules per string against inverter MPPT and DC voltage.
Optimal Tilt Angle
Fixed tilt recommendations from site latitude.
Azimuth Deviation Loss
Annual energy loss vs deviation from true south (N-hem).
Shading Loss
Annual generation loss from partial shading.
Temperature Loss
Power derating from cell temperature above STC 25 °C.
CO₂ Emissions Saved
Lifetime GHG savings from displaced grid electricity.
Grid Bill Offset
Monthly bill offset from a solar system.
Solar Water Pump
PV capacity needed for a DC/AC solar pump.
Solar Water Heater
Flat-plate / ETC collector area for hot-water demand.
Irradiance → Energy
PV energy produced from measured irradiance.
Fuse & Breaker Sizing
Overcurrent protection per NEC / IEC.
Conduit Fill
Conduit size for cable bundle at 40% fill.
Inter-row Spacing
Minimum row-to-row pitch to avoid winter shading.
Wind Load on Module
Wind pressure and force on a module per IS 875-3.
Peak Sun Hours
Convert daily insolation to Peak Sun Hours.
Monthly Yield Split
Distribute annual generation across months (India typical).
Net Metering Credit
Compute net units and monthly credit / payable.
Solar Loan EMI
Reducing-balance EMI for solar financing.
Diesel Generator Savings
Fuel and money saved by displacing DG with solar.
EV Charging from Solar
Time to charge an EV battery from a solar array.
Hybrid Inverter Sizing
Recommend hybrid inverter for PV + battery + backup.
Panel Degradation
Capacity remaining after N years at given degradation.
ROI & Payback Period
Simple payback, ROI and lifetime net savings of a PV plant.
LCOE (Levelised Cost)
Discounted levelised cost of energy over the plant life.
AC Cable Sizing
Inverter-to-panel AC cable size from voltage drop and current.
Performance Ratio (PR)
Measured plant PR and specific yield per IEC 61724-1.