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 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 2 parts:
Part 1) Instantly compare the three chief types of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Compare the elements of batteries, such as: depth of discharge, power and capacity, efficiency, battery life, and maker.
By the conclusion of this article you will know exactly how to pick the best battery for your 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 type of battery that will fit your system.
Lead Acid Batteries
They’re also one of 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 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 just making the transfer to a solar panel system, lead acid batteries might be an excellent option. They’re the type of battery we use in most 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 basically brand new to the industry and remain both somewhat untested and harder to come across. Of the 3 types of batteries, saltwater has the greatest depth of discharge, so you’ll find 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. Their depth of discharge is less than that of a saltwater battery, but more than that of a lead acid battery. 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. 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 explore to find the ideal battery for 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 as well. In some instances though, certain batteries could 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 is going to charge and drain regularly. With each cycle, the battery’s ability to hold the identical charge lessens slightly. So one component to consider is the warranty on the battery that guarantees a certain number of cycles of useful life. But keep in mind that when 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 damaging its life. Particular 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 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 save. Power is how much energy a battery can provide at a given moment. A battery with both a high capacity and high power can run a large system for several hours; a battery with low capacity and higher power can run a large system but only for a short time.
Efficiency is the amount of energy used compared to the amount of energy it took to store energy. Batteries require power to charge and efficiency compares the energy taken to charge a battery with the amount of energy that the charged battery produces.
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 startup brands. A trusted brand comes with known defects and advantages; a start-up brand can perhaps have better technology, but could also have unknown technological issues. Depending on your system needs, you might decide to go with a well-reviewed company or one that is brand new to the market.