How To Pick Out The Best Battery For a Solar Panel System, Battery Bank, or Off-Grid System
Or have you wondered what makes one deep cycle battery greater 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 your buck)!
When choosing a battery (or batteries) to your solar panel system, there are three categories of batteries that work best. We will do this in two parts:
Part 1) Instantly compare the three main types 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 the ideal battery to your 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 depend on what you’re looking for. 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 reliable batteries in existence. Compared to the other batteries we’ll 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 a great deal of storage for a lower cost, or whether you are just making the transfer to a solar panel system, lead acid batteries might 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 greater lifespan. Contrary to lead acid batteries, saltwater batteries are basically brand new to the market and stay both somewhat untested and more difficult to come across. Of the three types of batteries, saltwater has the greatest 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 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 options, the lithium ion battery is probably the highest rated, but also the most expensive. A good example of a lithium battery is the Tesla Powerwall.
Part 2) Compare the components 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 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 as well. In some instances though, certain batteries may be overkill for your system so the most expensive battery might not be the ideal choice always.
Battery Life and Warranty
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 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 bear in mind that when you use the maintenance and reconditioning methods we teach you at the EZ Battery Reconditioning application, 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. Certain 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
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 both a high capacity and higher power can run a large system for several hours; a battery with low capacity and higher power can operate a large system but only for a short time.
Efficiency is the amount of energy used compared to the amount of energy it took to store energy. Batteries require power to control and efficiency compares the energy taken to charge a battery together 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 technology, there are both trusted brands and start-up brands. A trusted brand includes known flaws and benefits; a start-up brand can perhaps have better technology, but can also have unknown technological issues. Depending on your system demands, you might decide to go for a well-reviewed company or one that is brand new to the market.