Have you ever wondered how to pick out the best battery(s) for your solar panel system (or off-grid energy system)? Or have you wondered what makes one deep cycle battery better 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 the buck)!
When choosing a battery (or batteries) to your solar panel system, there are 3 categories of batteries which work best. We will do this in 2 parts:
Part 1) Quickly 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 end of this article you will know exactly how to pick out the best battery for your own solar panel system!
So let’s get started…
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 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 are also among the longest-used and most dependable batteries in existence. Compared to the other batteries we’ll discuss in this report; they’re the cheapest option but you exchange cost for some battery life and depth of discharge. But for homeowners needing a great deal of storage for a lower price, or whether you are simply making the move to a solar panel system, lead acid batteries might be a very good option. They’re the type of battery we use in most of the battery banks within 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 basically brand new to the industry and remain both somewhat untested and harder to come across. Of the 3 kinds of batteries, saltwater has the best depth of discharge, which means 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 battery may be the highest rated, but also the most expensive. An example of a lithium ion battery is the Tesla Powerwall.
Part 2) Assess the components of batteries. As soon as you’ve chosen 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 elements. But the old saying,”you get what you pay for” holds true when buying batteries also. Sometimes though, certain batteries may be overkill for your system so the most expensive battery might not be the ideal choice always.
For many systems, a battery will cycle every day, meaning it will charge and drain regularly. With every cycle, the battery’s ability to hold the same charge lessens slightly. So one component to consider is the warranty on the battery that 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.
Length of Discharge
Length of release is how much you can drain the battery before needing to recharge the battery without harming its life. Certain solar batteries may be depleted farther than others, allowing for more use between charging. Basically, a battery with a 90% depth of discharge per cycle will provide more battery power per charge compared to a battery with less.
Capacity 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 high power can run a massive system for several hours; a battery with low capacity and high power can operate a large system but only for a short time.
Efficiency is the amount of energy used compared to the quantity of energy it took to store 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 produces. The higher the efficiency, the more cost-effective the battery.
This might not be a component most would consider, but it is something to focus on. Like other technology, there are both trusted brands and startup brands. A trusted brand includes known flaws and benefits; a start-up brand can perhaps have better technology, but could also have yet unknown technological difficulties. Based upon your system demands, you may decide to go with a well-reviewed company or one that is brand new to the market.