Or have you wondered what makes one deep cycle battery better than another? If so, this article 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) to your solar panel system, there are three categories of batteries which work best. We’ll do this in two parts:
Part 1) Instantly compare the three chief types of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Assess the elements of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and manufacturer.
By the conclusion of the article you will know exactly how to pick out the best battery to your own 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 type of battery that will fit your system.
Lead Acid Batteries
Lead acid batteries are the most commonly used rechargeable battery in the world. They’re also one of 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 price for some battery life and depth of discharge. But for homeowners needing a great deal of storage for a lesser price, or if you are just making the move to a solar panel system, lead acid batteries may be an excellent option. They’re the sort of battery we use in most of the battery banks in our solar panel systems.
Saltwater batteries are more expensive than lead acid batteries, but also have a greater lifespan. Unlike lead acid batteries, saltwater batteries are essentially brand new to the market and remain both somewhat untested and harder to come across. Of the three types of batteries, saltwater has the best depth of discharge, which means 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 options, the lithium battery may be the highest rated, but also the most expensive. An example of a lithium battery is the Tesla Powerwall.
Part 2) Assess the components of batteries. Once you’ve picked 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 ideal battery for your system.
Price is probably one of the more obvious elements. But the old saying,”you get what you pay for” holds true when buying batteries also. In some instances though, certain batteries may be overkill for your system so the most expensive battery may not be the ideal choice always.
For most systems, a battery will cycle every day, meaning it is going to charge and drain regularly. With each cycle, the battery’s ability to maintain the identical charge lessens slightly. So 1 component to consider is the guarantee on the battery that 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 in the EZ Battery Reconditioning application, you can extend the life of your batteries.
Length of Discharge
Length of release is how much you can drain the battery down before needing to recharge the battery without harming its life. Certain solar batteries can be depleted further than others, allowing for more use between charging. Essentially, 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 save. 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 high power can run a large system but only for a brief time.
Efficiency is the amount of energy used compared to the quantity of energy it took to store said energy. Batteries require power to charge and efficiency compares the energy taken to control a battery with the amount of energy which the charged battery produces.
This may not be a component most would consider, but it’s something to focus on. Like other technologies, there are both trusted brands and startup brands. A trusted brand includes known defects and advantages; a start-up brand can perhaps have better technology, but could also have unknown technological issues. Depending on your system demands, you may decide to go with a well-reviewed firm or one that is brand new to the market.