Or have you wondered what makes one deep cycle battery greater than another? If so, this article will answer these questions and provide you specific things to check on before buying your new battery (to make certain you get the most bang for the buck)!
When choosing a battery (or batteries) for your solar panel system, there are 3 categories of batteries that 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 maker.
By the conclusion of this 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 sort of battery that will fit your system.
Lead Acid Batteries
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 are the cheapest option but you trade price for some battery life and depth of discharge. But for homeowners needing lots of storage for a lower price, or if you are just making the move 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 market and remain both somewhat untested and more difficult to come across. Of the 3 kinds 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 types of solar batteries. 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) Compare 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 components to research 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 also. In some instances though, certain batteries could be overkill for your system so the most expensive battery may not be the ideal choice always.
For most systems, a battery will cycle daily, meaning it will charge and drain regularly. With every cycle, the battery’s ability to maintain the same charge lessens slightly. So one component to consider is the warranty 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 application, 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 harming its life. Particular solar batteries can be depleted farther 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.
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 that a battery can provide at a given moment. A battery with a high capacity and high power can run a massive system for several 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 amount of energy it took to save said energy. Batteries require power to charge and efficiency compares the energy taken to control a battery with the amount of energy that the charged battery generates. The higher the efficiency, the more cost-effective the battery.
This may not be a component most would consider, but it is something to pay attention to. Like other technologies, there are both trusted brands and start-up brands. A trusted brand comes with known flaws and advantages; a startup brand can perhaps have better technology, but can also have yet unknown technological difficulties. Depending on your system needs, you may decide to go for a well-reviewed company or one that is brand new to the market.