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) to 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 give you specific things to check on before buying your new battery (to ensure you get the most bang for the buck)!
When choosing a battery (or batteries) to your solar panel system, there are three categories of batteries which work best. We will do this in two parts:
Part 1) Instantly compare the three chief kinds of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Assess the elements of batteries, such as: depth of discharge, power and capacity, efficiency, battery life, and manufacturer.
By the end of the article you will know just how to pick the ideal battery to 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 reliable batteries in existence. When compared with the other batteries we’ll discuss in this report; they’re the cheapest option but you exchange cost for some battery life and depth of discharge. But for homeowners needing a great deal of storage for a lower price, or whether you are simply making the transfer to a solar panel system, lead acid batteries might be an excellent option. They’re the type of battery we use in the majority of the battery banks in our solar panel systems.
Saltwater batteries are more expensive than lead acid batteries, but also have a better lifespan. Contrary to lead acid batteries, saltwater batteries are essentially brand new to the industry and stay both somewhat untested and harder to come across. Of the three types of batteries, saltwater has the best depth of discharge, so you’ll get the most output per fee before needing to recharge.
Lithium batteries are the most expensive and the longest lasting of the three kinds 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 ion battery may be the highest rated, but also the most expensive. A good example of a lithium ion battery is the Tesla Powerwall.
Part 2) Assess the components of batteries. Once you’ve picked the best battery type for your own solar panel or off-grid system (that meets your system’s needs), there are elements to explore to find the perfect battery for your system.
Cost 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.
Battery Life and Warranty
For many systems, a battery will cycle every day, meaning it is going to charge and drain regularly. With every cycle, the battery’s ability to hold the identical charge lessens slightly. So 1 component to consider is the warranty on the battery that guarantees a specific number of cycles of useful life. But keep in mind that if you use the maintenance and reconditioning methods we teach you in 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 down before needing to recharge the battery without damaging its life. Particular solar batteries may be depleted farther than others, allowing for more use between charging. Basically, a battery with a 90% depth of discharge per cycle provides more battery power per charge compared to a battery with less.
Capacity and Power
The more capacity a battery has, the more power it can save. Power is how much energy a battery can provide at a given moment. A battery with a high capacity and high power can run a large system for many hours; a battery with low capacity and high power can run a large system but only for a short time.
Efficiency is the amount of energy used compared to the quantity of energy it took to save said 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 generates. The higher the efficiency, the more cost-effective the battery.
This may not be a part most would consider, but it’s something to focus on. As with other technologies, there are both trusted brands and startup brands. A trusted brand comes with known flaws and benefits; a start-up brand can perhaps have better technology, but can also have yet unknown technological issues. Based on your system demands, you may decide to go with a well-reviewed firm or one that is brand new to the market.