We’d have to make sure our cables were low gauge(thick) to handle the increased heat. High amperage currents charge our batteries faster, but they also require much thicker wiring and specialized connectors.Īs electricians will tell you, high amps means high heat. You may look at this and think that maximizing your amperage is the way to go. Once we’ve reached our desired voltage in our charging current, additional amps result in a faster charge time.ĮX: Our battery bank has a 400 amp/hour capacity and runs at 12 voltsĪ 12 volt 40 amp current will recharge our battery in around 10 hours.Ī 12 volt 10 amp current will recharge our battery in around 40 hours. If our battery bank runs at 12 volts, we want to recharge it with a current at or a little above that 12 volt rating. When we talk about recharging batteries, two parts of the electric current are important: amps, and voltage. Wiring Your Solar Panels (Series vs Parallel) Lithium batteries have several advantages over lead deep-cycle batteries, but they come with an added cost– sometimes ten times as much. They also typically have a shorter shelf life than lithium batteries. Lead deep-cycle batteries are cheap, but should always be held above half charge and can require maintenance. On the other hand, Tesla solar setups use a massive lithium battery to store energy. Many RV’s find that a few lead deep-cycle batteries more than suffice for their application. There are several different kinds of batteries you can use for your solar setup.Ī common and cheap solution is lead deep cycle batteries.Ī more expensive but higher quality battery would be a lithium battery. You can find that calculator by clicking here Different Types of Batteries
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It’s also important to consider that you’ll be receiving far more sunlight in summer than the winter.īecause generalizing with this is impossible, we’ve created a calculator that can guess at your average drain and sunlight hours based on your zip code. This is influenced by your latitude and how cloudy your region is, amongst other factors. You could be looking for a small solar panel to bring with you on a backpacking trip to recharge your phone.Īlternatively, you could be planning a roof installation with the hope of powering your entire home with solar to become entirely energy independent.ĭifferent parts of the country vary in how much sunlight they receive.
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You could be hoping to install solar panels on the roof of your RV to help power a TV or recharge a laptop. This makes guessing at your number of solar panels very difficult. Perhaps the single most important bit of information you need to know to buy the correct number of solar panels is what you’ll be using them for.ĭifferent users have wildly different builds and appliances. Drain From Appliances and Amount of Sunlight
(4) The specifics of wiring of your solar panels (1) Your daily drain and how much sunlight you expect to receive While it may seem like a simple question, the answer depends on a huge number of factors. One of the first questions that beginners ask as they plan out their solar setup is: “ How many solar panels should I buy?”
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