You need around 430 watts of solar panels to charge a 12V 140Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller.
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Generally, the inverter should be sized to match about 80–100% of your system's DC rating. For example, if you have a 5 kW solar array, you might choose a 5 kW inverter.
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The typical dimensions of a 50-watt solar panel are about 39 inches long and 26 inches wide. The weight usually ranges from 15 to 20 pounds, depending on the design and materials.
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A 30kW Solar Kit requires up to 750 square feet of space. 30kW or 30 kilowatts is 30,000 watts of DC direct current power.
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