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 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 that 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) Compare the components of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and maker.
By the conclusion of this article you will know exactly how to pick out the ideal battery for your own 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’re also among the longest-used and most dependable batteries in existence. When compared with the other batteries we’ll discuss in this report; they are the cheapest option but you exchange price for some battery life and depth of discharge. But for homeowners needing a great deal of storage for a lower price, or if you are simply 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 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. Contrary to lead acid batteries, saltwater batteries are essentially brand new to the market 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 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 ion battery is probably the highest rated, but also the most expensive. An example of a lithium battery is the Tesla Powerwall.
Part 2) Assess 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 research to find the ideal 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 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 every day, meaning it will charge and drain regularly. With each cycle, the battery’s ability to hold the same charge lessens slightly. So one component to consider is the guarantee on the battery which 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 at the EZ Battery Reconditioning program, 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. Particular solar batteries may 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.
Ability 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 both a high capacity and high power can run a large system for many hours; a battery with low capacity and higher 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 save said energy. Batteries require power to charge and efficacy compares the energy taken to charge a battery with the amount of energy that the charged battery generates.
This may not be a part most would consider, but it’s something to focus on. Like other technology, there are both trusted brands and start-up brands. A trusted brand includes known flaws and benefits; a startup brand can perhaps have better technology, but could also have unknown technological difficulties. Depending on your system needs, you might decide to go for a well-reviewed company or one that is brand new to the market.