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Solar System Size Calculator

Estimate the solar array capacity and approximate panel count needed to offset a selected share of household electricity use.

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Solar Panel Output Calculator

Estimate daily, monthly, and annual energy production for a solar array using panel rating, quantity, sun hours, and system losses.

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PV String Voltage Calculator

Check estimated cold-weather open-circuit voltage and nominal operating voltage against an inverter’s DC and MPPT limits.

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Solar Payback Calculator

Estimate simple payback, first-year savings, and ten-year net benefit for a residential solar installation.

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Solar Panel Count Calculator

Estimate how many solar panels are required to meet a target portion of annual electricity consumption.

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Solar Panel Roof Area Calculator

Estimate the gross roof area required for a selected number of solar modules, including a configurable layout allowance.

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Solar Battery Size Calculator

Estimate nominal home-battery capacity for a target backup duration and selected share of household load.

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Solar Self-Consumption Calculator

Estimate solar self-consumption, grid export, and solar self-sufficiency from annual generation and on-site energy use.

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Solar Export Value Calculator

Calculate monthly and annual revenue or bill credit from exported solar electricity.

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Solar Panels for EV Charging Calculator

Estimate the additional solar capacity and panel count needed to offset annual electric-vehicle charging energy.

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Solar Production Loss Calculator

Compare expected and measured solar generation to quantify energy shortfall, percentage loss, and estimated financial impact.