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 greater than another? If so, this report will answer these questions and provide 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) for your solar panel system, there are three categories of batteries that work best. We’ll do this in two parts:
Part 1) Instantly compare the three chief kinds of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Compare the elements of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and manufacturer.
By the end of this article you will know exactly how to pick out the best battery to your solar panel system!
So let’s get started…
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 are also one of the longest-used and most dependable batteries in existence. When compared with the other batteries we will discuss in this report; they’re the cheapest option but you trade price for some battery life and depth of discharge. But for homeowners needing lots of storage for a lesser price, or if you are just making the transfer to a solar panel system, lead acid batteries may be a very good option. They’re the sort of battery we use in the majority of the battery banks within our solar panel systems.
Saltwater batteries are more expensive than lead acid batteries, but also have a better lifespan. Unlike lead acid batteries, saltwater batteries are basically brand new to the industry and stay both somewhat untested and more difficult to come across. Of the three types of batteries, saltwater has the best depth of discharge, so you’ll find 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 choices, the lithium battery may be the highest rated, but also the most expensive. An example of a lithium ion battery is the Tesla Powerwall.
Part 2) Compare the elements of batteries. Once you’ve chosen the best battery type for your 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 elements. But the old saying,”you get what you pay for” holds true when purchasing batteries also. 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 will charge and drain regularly. With every cycle, the battery’s ability to maintain the same charge lessens slightly. So 1 component to consider is the guarantee on the battery which guarantees a specific number of cycles of useful life. But bear 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 before needing to recharge the battery without damaging its life. Particular solar batteries can 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 than a battery with less.
Ability and Power
The more capacity a battery has, the more power it can store. Power is how much energy a battery can provide at a certain moment. A battery with both a high capacity and high power can run a large system for many hours; a battery with low capacity and higher power can run a large system but just for a brief time.
Efficiency is the amount of energy used compared to the amount of energy it took to save said energy. Batteries require power to control and efficacy compares the energy taken to charge a battery together with the amount of energy that the charged battery produces.
This might not be a component most would consider, but it’s something to focus on. As with other technologies, there are both trusted brands and start-up brands. A trusted brand comes with known defects and benefits; a startup brand can perhaps have better technology, but can also have yet unknown technological difficulties. Based upon your system needs, you may decide to go for a well-reviewed company or one that is brand new to the market.