The size of the solar panel required to charge a lithium battery depends on the lithium battery's capacity. All solar panel voltages should be marked in the item description of our website or on the unit itself. Any one who works out the Amps of a solar panels using 12v as the voltage calculation does not understand solar or has been misinformed. Please note that Solar Panels are not 12v, I repeat Solar Panels are not 12v. To calculate the energy it can supply the battery with, divide the Watts by the Voltage of the Solar Panel. Solar Panels power generation is commonly given in Watts e.g. They are Australian designed and built for our harsh environment. You can also use more of the battery capacity in an iTECH120 - 80% which means its usable Amp Hour rating is similar to a 200 Amp Hour AGM. View our 12v lithium battery range. AGM batteries usually weigh 35kg but and iTECH120 battery weighs just 13kg. This new type of battery is a fraction of the weight of old style AGM batteries. A smarter battery setup would be to use an iTECH120 120Ah lithium battery. With the aim of leaving 50% in the battery brings the requirement to 56 Ah per day. Take this wattage and divide it by the voltage, 12V, gives 28Ah. Taking into account the average small campsite - with a small 45W fridge running for 6 hours, 3 hours of 15W lighting and 20W of other electronic equipment - the minimum consumption to be expected is 335W. Theoretically a 100Ah battery can deliver 5 amps over a 20 hour period (and so on). When choosing a battery, keep in mind the equipment you will be powering and the time in which they will be running. If a battery is rated at 100 amp hours it should deliver 5 amps of power for 20 hours or 20 amps of power for 5 hours. This rating is usually found on deep cycle batteries. 12V) – see calculations above.ĪH refers to amp hours. You need to convert this to Watt Hours by multiplying the Ah figure by the battery voltage (e.g. When solar panels are charging a battery it is usually at a varying rate which could harm an appliance if not regulated.īattery capacity is measured in Amp Hours (e.g. Secondly a battery can regulate the power going in to the appliance at a constant rate. Solar panels might not generate enough wattage to directly power an appliance, but they can build up a higher wattage via a battery. There are a couple of reasons for having batteries. Solar panels are commonly used to charge a battery – not to charge a device directly. The electric charge in Amps is equal to the energy in Watts divided by the voltage in volts (V):įind the electric charge in Amps when the energy consumption is 300 watts and the voltage is 240 volts. You can then use the equation Watts Volts x Amps so 240v x 1.5amps = 360 Watts. 240V and the Amps AC it draws such as 240V – 1.5A. If your device doesn’t have the Watts labelled on it, then it should at least have the input Volts i.e. The energy in Watts is equal to the electric charge in Amps times the voltage in volts: For example:ġ0 watt device used over 3 hours equals 10 x 3 = 30 Watt How to convert Amps to Watts To calculate the energy you will use over time, just multiply the power consumption by the hours of use. The power consumption of appliances is usually given in Watts. I will try my best to answer everyone.Ī larger solar panel will collect more energy in less time, but just how big does the solar panel need to be? If anyone has a question pop it in the comment section below. Knowledge is key when setting up your rig for solar so the more information you have on each and every one of those home comforts devices you plan to take away with you the better. So you want to set your rig up for Solar but you are not sure what size of set up you need? This blog is designed to give you the tools needed to be able to work out exactly what are you are drawing from your rig's batteries and what type of solar set up you need.
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