Solar Panel and Battery Sizing Calculator
Specify the solar panel wattage you plan to use. The result will estimate how many panels you need to meet your energy goals. Enter the battery storage capacity, allowing the
Lithium-ion batteries are the most popular choice for modern solar panel systems. These batteries are known for their higher energy density, longer lifespan, and greater efficiency compared to lead-acid batteries. They are commonly used in both residential and commercial solar installations.
To convert amp hour to watts, multiply the amp hour by its voltage. The result is the watt hour. So for a 12V, 20Ah battery, that is 240 watt hours (12 x 20 = 240). Since a 50W solar panel can provide up to 250W, you can use it in this case. However we would recommend a 100W solar panel for regular 25ah and higher charging.
A 50W solar panel can produce 4 amps per hour, so that is 20ah in 5 hours of sunlight. A fully charged 20ah battery can power small appliances, a laptop, mobile devices etc. As long as the battery can store energy from a solar panel you can use it for years.
To store solar power, you'll need a deep-cycle battery, typically lithium-ion or lead-acid. Lithium-ion batteries are more efficient and last longer but are more expensive than lead-acid options. There are several types of solar batteries, including lead-acid, lithium-ion, and saltwater.
PDF version includes complete article with source references.
Get specifications and technical data for our MW-scale energy storage and PV integration solutions.
45 Energy Innovation Park
London WC2H 8NA, United Kingdom
+44 20 7783 1966
Monday - Friday: 8:00 AM - 6:00 PM GMT