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 provide you specific things to check on before purchasing your new battery (to ensure you get the most bang for the buck)!
When picking 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) Instantly compare the three chief kinds of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Compare the components of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and manufacturer.
By the conclusion of this article you will know exactly how to pick the best battery for 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 type of battery that will fit your system.
Lead Acid Batteries
They’re also among the longest-used and most dependable 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 lots of storage for a lower price, or if you are simply making the move to a solar panel system, lead acid batteries may be a very good option. They’re the type 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 essentially 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 greatest depth of discharge, which means 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. 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 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 chosen the best battery type for your own solar panel or off-grid system (that meets your system’s needs), there are components to research to find the perfect battery to your system.
Price 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. Sometimes though, certain batteries could be overkill for your system so the most expensive battery might not be the best choice always.
Battery Life and Warranty
For most systems, a battery will cycle daily, meaning it will charge and drain regularly. With every 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 certain 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 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 compared to a battery with less.
Capacity and Power
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 massive 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 save energy. Batteries require power to charge and efficacy compares the energy taken to charge a battery with the amount of energy which the charged battery generates.
This may not be a part most would consider, but it’s something to pay attention to. As with 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 could also have yet unknown technological issues. Depending upon your system needs, you might decide to go for a well-reviewed firm or one that is brand new to the market.