![]() This means that our solar setup should be able to provide 10.8 kWh of energy on a daily basis. With the assumption that they run for 12 hours a day, the daily energy consumption of these grow lights is:ĭaily Energy Consumption (Watt-hours) = Wattage Rating (Watts) x Run Time (hours)ĭaily Energy Consumption (Watt-hours) = 900 Watts x 12 hoursĭaily Energy Consumption (Watt-hours) = 10800 Watt-hoursĭaily Energy Consumption (kiloWatt-hours) = 10.8 kWhĪccording to these calculations, the grow lights would consume 10.8 kWh of energy every single day. Therefore, when they’re on, the total power usage of these grow lights is 900 watts (450w x 2). Now, according to the manufacturer, each of these panels uses 450 watts of power. Let’s also assume that I run these grow lights for 12 hours a day. To calculate the energy consumption of your grow lights, simply multiply each of their wattage ratings (watts) by the number of hours that they run for:Įnergy Consumption (Watt-hours) = Wattage Rating (Watts) x Run Time (hours)įor example, let’s assume I’m using 2 of these SPIDER FARMER SF-4000 grow lights for 2 (4x4ft) grow tents. ft 1.73 kWh (1730 Wh) 3.46 kWh (3450 Wh) Power usage and energy consumption of different grow lights. Hydrofarm Agrobrite Designer T5 216 Watts 6-9 Sq. The daily energy consumption of a grow light, which is measured in Watt-hours or kiloWatt-hours (1 kWh = 1000 Wh), will depend on its exact power usage (watts) and the number of hours for which it runs on a daily basis.įor example, the following table provides some of the most popular grow lights, their power usage, and energy consumption over different amounts of time: Grow Light model Power Usage (Watts) Coverage Energy Consumption over 8 hours (kWh) Energy Consumption over 16 hours (kWh) However, this rated wattage will represent the power usage of the grow light and not its energy consumption. The exact power usage of your grow light should be indicated by the manufacturer (in Watts). On average, grow lights use between 25 and 35 watts of power for every square foot of coverage. I get commissions for purchases made through links in this post. After that, I will discuss the other solar components that you need, and how to size each of them correctly.īut before we get into that, the first step would be to determine the energy consumption of your grow lights. In this article, I will show you how to calculate the amount of solar power required to run your grow lights. However, in addition to the solar panels, you will also need the following components: The amount of solar power that you need to run your grow lights can be calculated using the daily energy consumption of your grow lights, and the amount of sunlight that you receive in your location.
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