Or have you wondered what makes one deep cycle battery greater than another? If so, this article will answer these questions and give 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) Quickly 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 end of this article you will know exactly how to pick out the best battery to your solar panel system!
So let’s begin…
So the first decision to make is the sort of battery that will fit your system.
Lead Acid Batteries
They are also among the longest-used and most dependable batteries in existence. Compared to 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 lesser price, or whether you are just making the transfer to a solar panel system, lead acid batteries might be an excellent 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. Contrary to lead acid batteries, saltwater batteries are essentially brand new to the market and stay both somewhat untested and harder to come across. Of the three kinds of batteries, saltwater has the greatest depth of discharge, so 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 kinds of solar batteries. Comparing all three choices, 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) Assess the elements 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 elements to research to find the perfect battery to 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 best choice always.
Battery Life and Warranty
For many 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 same charge lessens slightly. So one component to consider is the warranty on the battery which guarantees a certain 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.
Length of Discharge
Depth of discharge is how much you can drain the battery before needing to recharge the battery without damaging 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 will provide 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 a battery can provide at a given moment. A battery with a high capacity and higher power can run a large system for many hours; a battery with low capacity and high power can run a large system but just 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 control and efficiency compares the energy taken to control a battery together 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 reputable brands and startup brands. A trusted brand includes known defects and advantages; a startup brand can perhaps have better technology, but could also have yet unknown technological difficulties. Based on your system demands, you may decide to go with a well-reviewed company or one that is brand new to the market.