Powerfields.com | 1-800-843-3702 19 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4.5 4.5 4.5 5 5 5 5 5 5 5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4 4 Your solar panel should match the size of your fence. For each joule of output, allow 7 watts of solar panel for high sunlight areas and 10 watts in low sunlight areas. For example, a 3-joule energizer requires a 30-watt solar panel. Calculate what your energizer (load) needs to run for a day. Example is for a 3-joule energizer. How to calculate required amperage hours (Ah) per day: Volts x Amps = Watts 12 volts x .29 amps = 3.48 watts Wh = 3.48 W x 24 hours = 83.52 Wh Determine Amperage Hours: Ah = Wh/V Ah = 83.52Wh/12V = 6.96 Ah per day Determine peak sunlight hours for your location with the above map. Calculate which solar panel will provide the Ah per day you need. Divide Ah from Step 1 by the number of peak sun hours per day. 6.96 Ah/4hr =1.74A. This means you need a panel that produces 1.74 amps. Determine panel size: A = Watt/Volt Watt = Volt x Amp ____ = 12V x 1.74A = 20.88 watts (always add 20% to account for real world conditions) 20.88 * 1.2 = 25.06 watts (round up) = 30-watt panel Unit (joules) 1J 2J Amp (energizer) 0.10 0.18 Wattage (energizer) 1.14 2.16 Wh used /day (energizer) 27.36 51.84 Ah used per day (energizer) 2.28 4.32 Voltage (battery) 12.00 12.00 Sunlight (hours) 4.00 4.00 Amps Needed 0.57 1.08 Solar Panel (watts) 10.00 20.00 SOLAR PANEL Calculator STEP ONE STEP THREE STEP TWO SIZING Your Panel

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