Or have you wondered what makes one deep cycle battery greater than another? If so, this report will answer these questions and provide you specific things to check on before purchasing your new battery (to ensure you get the most bang for your buck)!
When choosing a battery (or batteries) for your solar panel system, there are three categories of batteries that work best. We’ll do this in two parts:
Part 1) Quickly compare the three chief kinds of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Compare 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 for your solar panel system!
So let’s begin…
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.
They are also among the longest-used and most reliable batteries in existence. Compared to the other batteries we will 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 an excellent option. They’re the type of battery we use in the majority 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 industry and remain both somewhat untested and harder to come across. Of the three kinds of batteries, saltwater has the greatest depth of discharge, which means you’ll get the most output per charge 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 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 elements 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.
Price is probably one of the more obvious components. But the old saying,”you get what you pay for” holds true when buying batteries as well. Sometimes though, certain batteries may be overkill for your system so the most expensive battery might not be the best choice always.
For many systems, a battery will cycle daily, meaning it is going to charge and drain regularly. With every cycle, the battery’s ability to hold the identical charge lessens slightly. So one component to consider is the guarantee on the battery that guarantees a certain 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 program, 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 damaging its life. Certain solar batteries can be depleted further than others, allowing for more use between charging. Basically, a battery with a 90% depth of discharge per cycle provides more battery power per charge than a battery with less.
Ability 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 certain moment. A battery with a high capacity and higher power can run a large system for several hours; a battery with low capacity and high 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 store energy. Batteries require power to control and efficacy compares the energy taken to control a battery with the amount of energy which 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 pay attention to. Like other technology, there are both trusted brands and start-up brands. A trusted brand comes with known defects and benefits; a start-up brand can perhaps have better technology, but could also have yet unknown technological difficulties. Depending on your system needs, you might decide to go with a well-reviewed firm or one that is brand new to the market.