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 ensure you get the most bang for the buck)!
When choosing a battery (or batteries) to your solar panel system, there are 3 categories of batteries that work best. We will do this in 2 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 manufacturer.
By the conclusion of the article you will know just how to pick the ideal battery for your solar panel system!
So let’s begin…
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 type of battery that will fit your system.
Lead acid batteries are the most commonly used rechargeable battery in the world. They are also among 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 exchange price for some battery life and depth of discharge. But for homeowners needing a great deal of storage for a lower cost, or if you are simply making the transfer to a solar panel system, lead acid batteries may be a very good option. They’re the type 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 greater lifespan. Contrary to lead acid batteries, saltwater batteries are basically brand new to the industry and remain both somewhat untested and harder to come across. Of the 3 types of batteries, saltwater has the best depth of discharge, which means you’ll find 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 choices, 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) Compare the components of batteries. As soon as 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 research to find the ideal 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. Sometimes though, certain batteries could 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 drain and charge regularly. With each cycle, the battery’s ability to hold the same charge lessens slightly. So 1 component to consider is the warranty on the battery which 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 at the EZ Battery Reconditioning program, you can extend the life of your batteries.
Depth of Discharge
Depth of discharge is how much you can drain the battery before needing to recharge the battery without harming its life. Particular solar batteries may be depleted further 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.
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 given moment. A battery with a high capacity and higher power can run a massive system for several hours; a battery with low capacity and higher power can operate a large system but only for a brief time.
Efficiency is the amount of energy used compared to the amount of energy it took to save energy. Batteries require power to charge and efficiency compares the energy taken to control a battery together with the amount of energy that the charged battery produces.
This might not be a component most would consider, but it is something to focus on. Like other technologies, there are both reputable brands and start-up brands. A trusted brand includes known defects and advantages; a startup brand can perhaps have better technology, but can also have yet unknown technological issues. Based on your system needs, you might decide to go for a well-reviewed firm or one that is brand new to the market.