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Renewable Energy calculators

Sizing maths for solar, battery storage and off-grid systems: panels, tilt angle and payback period.

Solar Payback PeriodYears to recoup a solar system's net cost from its annual electricity bill savings.Off-Grid Battery SizingBattery capacity needed to cover a daily energy load for a chosen number of autonomy days.Solar Panel Tilt AngleRule-of-thumb fixed tilt angle from latitude, for year-round, winter or summer weighting.Solar Energy YieldEstimated annual output from a solar array, from its size, sun hours and system efficiency.Battery RuntimeHow long a battery powers a continuous load, from capacity, depth of discharge and wattage.

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