On average, a solar panel can output about 400 watts of power under direct sunlight, and produce about 2 kilowatt-hours (kWh) of energy per day.
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Typically, for sunrooms, an estimate can range from 10 to 15 watts per square foot, taking individual factors into consideration.
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Result: You need about 120 watt solar panel to fully charge a 12v 50ah lithium (LiFePO4) battery from 100% depth of discharge in 6 peak sun hours. Read the below post to find out how fast you can charge your battery.
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For a single 150 watt solar panel, you'd need about 12v 70-100Ah lithium or 12v 140-200Ah lead-acid battery. The exact value will depend on the amount of peak sun hours your location receives.
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