Or have you wondered what makes one deep cycle battery better than another? If so, this report will answer these questions and give you specific things to check on before purchasing your new battery (to make certain you get the most bang for the buck)!
When choosing a battery (or batteries) to your solar panel system, there are three categories of batteries that work best. We will do this in two parts:
Part 1) Quickly 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, capacity and power, efficiency, battery life, and maker.
By the end of the article you will know just how to pick out the ideal battery to your own 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 sort of battery that will fit your system.
Lead acid batteries are the most commonly used rechargeable battery in the world. They’re also among the longest-used and most reliable batteries in existence. Compared to the other batteries we’ll discuss in this report; they’re the cheapest option but you trade cost for some battery life and depth of discharge. But for homeowners needing lots of storage for a lesser price, or if you are just making the move 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 industry and stay both somewhat untested and harder to come across. Of the 3 kinds of batteries, saltwater has the best 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. Comparing all three options, the lithium battery may be the highest rated, but also the most expensive. An example of a lithium ion battery is the Tesla Powerwall.
Part 2) Assess the elements 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 explore to find the perfect battery to 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 may not be the ideal choice always.
Battery Life and Warranty
For most systems, a battery will cycle daily, meaning it will drain and charge regularly. With each cycle, the battery’s ability to hold the same charge lessens slightly. So 1 component to consider is the warranty on the battery which guarantees a specific number of cycles of useful life. But keep 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.
Depth of Discharge
Depth of discharge is how much you can drain the battery before needing to recharge the battery without damaging 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 than a battery with less.
Capacity and Power
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 massive system for several 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 together with the amount of energy which the charged battery produces.
This may not be a component most would consider, but it is something to focus on. As with other technology, there are both reputable brands and start-up brands. A trusted brand includes known defects and benefits; a start-up brand can perhaps have better technology, but could also have yet unknown technological issues. Based on your system demands, you may decide to go for a well-reviewed firm or one that is brand new to the market.