Solar & energy calculators

Enter module datasheet values, design temperatures, and inverter limits to find the usable series-string range and the parallel-string limit for one MPPT.

Enter the panel busbar, main breaker, inverter output current, and proposed PV breaker total. The calculator checks the opposite-end 120% busbar rule and shows the breaker, current, inverter-capacity, inverter-count, and main-breaker limits implied by those numbers.

Enter the load, autonomy target, battery limits, and one battery size to estimate the minimum bank capacity and the whole-battery layout that can actually be built.

Enter a tree, chimney, or wall’s size and bearing to estimate when it blocks direct sun on one selected day. The result separates the shade duration from the energy-weighted loss on your panel plane.

Enter a location, day, clock time, and panel orientation to find the angle between the Sun and the panel normal. The result also shows the direct-beam capture penalty and the Sun’s position after the clock time is corrected to true solar time.

Enter the site latitude, row geometry, tilt, and shade-free design window to estimate the rear-edge gap and row pitch for a fixed-tilt PV array.

Enter one panel rating, sunlight on the panel plane, air temperature, wind, mounting style, and the panel temperature coefficient. The calculator estimates cell temperature, DC watts now, and the air temperature needed to reach a selected output.

Enter the module Isc, string count, backfeed current, conductor ampacity, and fuse rating to see the minimum OCPD size and whether the selected fuse fits the PV limits.

Enter the PV module current, parallel strings, run length, conductor type, temperature, and voltage-drop target. The calculator compares ampacity and voltage drop, then shows which one controls the selected conductor size.

Enter the sun position, tracker axis, cross-axis slope, row width, pitch, and rotation limit. The calculator compares true tracking with slope-aware backtracking and shows the shading left by the final commanded angle.