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 give you specific things to check on before buying your new battery (to make certain you get the most bang for the buck)!
When picking a battery (or batteries) for your solar panel system, there are three categories of batteries which 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) Assess the elements of batteries, such as: depth of discharge, power and capacity, efficiency, battery life, and maker.
By the conclusion of the article you will know exactly how to pick the best battery to your own solar panel system!
So let’s get started…
So the first decision to make is the sort of battery that will fit your system.
Lead Acid Batteries
Lead acid batteries are the most commonly used rechargeable battery in the world. They are also among the longest-used and most reliable batteries in existence. When compared with the other batteries we’ll discuss in this report; they’re the cheapest option but you trade price for some battery life and depth of discharge. But for homeowners needing lots of storage for a lower cost, or whether you are simply making the transfer to a solar panel system, lead acid batteries may be a very good option. They’re the type 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. Unlike lead acid batteries, saltwater batteries are essentially brand new to the industry and stay 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 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 may be the highest rated, but also the most expensive. A good example of a lithium ion battery is the Tesla Powerwall.
Part 2) Assess the components of batteries. As soon as 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 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 most systems, a battery will cycle every day, meaning it is going to drain and charge regularly. With each cycle, the battery’s ability to maintain the same charge lessens slightly. So one component to consider is the guarantee on the battery that guarantees a specific number of cycles of useful life. But bear 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.
Depth 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 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 compared to 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 certain moment. A battery with both a high capacity and higher 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 save energy. Batteries require power to control and efficacy compares the energy taken to charge a battery together with the amount of energy which the charged battery generates.
This may not be a part most would consider, but it is something to focus on. Like other technologies, there are both trusted brands and start-up brands. A trusted brand includes known defects and advantages; a start-up brand can perhaps have better technology, but can also have unknown technological issues. Depending on your system needs, you may decide to go for a well-reviewed firm or one that is brand new to the market.