How To Pick Out The Best Battery For a Solar Panel System, Battery Bank, or Off-Grid System
Have you ever wondered how to pick out the best battery(s) for your solar panel system (or off-grid energy system)? Or have you wondered what makes one deep cycle battery better than another? If so, this report will answer these questions and provide you specific things to check on before purchasing your new battery (to make certain you get the most bang for the buck)!
When picking a battery (or batteries) for your solar panel system, there are three categories of batteries that work best. We will do this in two parts:
Part 1) Instantly compare the three main types of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Assess the components of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and maker.
By the end of the article you will know just how to pick the ideal battery for your own solar panel system!
So let’s begin…
Part 1) The Three Best Types Of Batteries For Solar Panel Systems: The best type of battery for your solar panel system will be dependent on what you’re looking for. There are three battery types that work exceptionally well; however, each battery type has pros and cons. So the first decision to make is the sort of battery that will fit your system.
Lead acid batteries are the most commonly used rechargeable battery in the world. They’re also among the longest-used and most dependable batteries in existence. Compared to the other batteries we’ll discuss in this report; they are the cheapest option but you trade cost for some battery life and depth of discharge. But for homeowners needing a great deal of storage for a lower cost, or whether you are simply making the transfer to a solar panel system, lead acid batteries might be a very good option. They’re the sort of battery we use in most of the battery banks within our solar panel systems.
Saltwater batteries are more expensive than lead acid batteries, but also have a greater lifespan. Contrary to lead acid batteries, saltwater batteries are essentially brand new to the market and stay both somewhat untested and harder to come across. Of the three kinds of batteries, saltwater has the best depth of discharge, which means you’ll get the most output per charge before needing to recharge.
Lithium batteries are the most expensive and the longest lasting of the three types of solar batteries. Their depth of discharge is less than that of a saltwater battery, but more than that of a lead acid battery. Comparing all three options, the lithium battery is probably the highest rated, but also the most expensive. An example of a lithium battery is the Tesla Powerwall.
Part 2) Assess the elements of batteries. Once you’ve chosen the best battery type for your own solar panel or off-grid system (that meets your system’s needs), there are components to explore to find the perfect battery for your system.
Price is probably one of the more obvious components. But the old saying,”you get what you pay for” holds true when buying batteries as well. In some instances though, certain batteries may be overkill for your system so the most expensive battery may not be the best choice always.
For most systems, a battery will cycle every day, meaning it is going to charge and drain regularly. With every cycle, the battery’s ability to maintain the identical charge lessens slightly. So 1 component to consider is the guarantee on the battery which guarantees a certain number of cycles of useful life. But keep in mind that when you use the maintenance and reconditioning methods we teach you at the EZ Battery Reconditioning program, you can extend the life of your batteries.
Depth of Discharge
Length of release is how much you can drain the battery before needing to recharge the battery without damaging its life. Certain solar batteries may be depleted farther than others, allowing for more use between charging. Essentially, a battery with a 90% depth of discharge per cycle will provide more battery power per charge than a battery with less.
Capacity and Power
Measured in kilowatt hours (kWh), capacity is the amount of energy a battery can store over time. The more capacity a battery has, the more power it can store. Power is how much energy a battery can provide at a given moment. A battery with a high capacity and higher power can run a large system for many hours; a battery with low capacity and higher power can operate a large system but just for a brief time.
Efficiency is the amount of energy used compared to the quantity of energy it took to save energy. Batteries require power to charge and efficiency compares the energy taken to charge a battery together with the amount of energy which the charged battery produces.
This may not be a part most would consider, but it is something to focus on. As with other technology, there are both reputable brands and startup brands. A trusted brand includes known flaws and benefits; a start-up brand can perhaps have better technology, but could also have yet unknown technological difficulties. Depending on your system needs, you might decide to go for a well-reviewed company or one that is brand new to the market.