Off-Grid Worksheets

Off-Grid Load Calculation Worksheet Start by finding how many watts each appliance will consume. Do not add appliances that should be propane-fueled, such as cooktops, hot water heaters and electric heat. Then multiply rated wattage of each appliance by the number of hours per day, on average, that appliance runs. This gives the total watt-hours…

Off-Grid Battery Sizing Worksheet       We suggest a battery bank sized to provide enough energy for three days of energy consumption without any charging (solar, hydro, wind, generator) and that will not deplete the battery bank’s capacity by more than 50% and that will compensate for a battery manufacturer’s over-rating of their batteries….

Off-Grid Solar Array Sizing     Once you’ve determined your daily energy consumption in watt-hours, follow the advice offered below. There are many methods used for calculating your system’s solar array size. Traditionally off-grid systems are sized using a worst-case scenario of sun hours for December 21st, the shortest day of the year. This insures…

Voltage Loss and Wire Sizing CalculatorCalculate the (Copper) wire gauge needed for a run Amps (Total from array) Voltage (Total from array) Distance (Feet) Voltage Drop(Allowable Percentage) Get Wire Size