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 make certain you get the most bang for your buck)!
When picking a battery (or batteries) for your solar panel system, there are 3 categories of batteries which work best. We’ll do this in 2 parts:
Part 1) Instantly compare the three main types 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 end of this article you will know exactly how to pick out 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
Lead acid batteries are the most commonly used rechargeable battery in the world. They’re also one of the longest-used and most dependable batteries in existence. When compared with the other batteries we will 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 move to a solar panel system, lead acid batteries might 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 market and remain both somewhat untested and harder to come across. Of the 3 types of batteries, saltwater has the best depth of discharge, so 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 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 elements of batteries. As soon as you’ve picked the best battery type for your solar panel or off-grid system (that meets your system’s needs), there are components to research to find the ideal battery to 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 may not be the ideal choice always.
For most systems, a battery will cycle every day, meaning it will charge and drain regularly. With every cycle, the battery’s ability to maintain the identical charge lessens slightly. So one component to consider is the warranty on the battery which 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 at the EZ Battery Reconditioning application, you can extend the life of your batteries.
Depth of Discharge
Length of release is how much you can drain the battery down before needing to recharge the battery without damaging its life. Particular 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 provides more battery power per charge compared to a battery with less.
Ability 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 store. 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 just for a brief time.
Efficiency is the amount of energy used compared to the amount of energy it took to store energy. Batteries require power to control and efficacy compares the energy taken to control a battery together with the amount of energy which the charged battery generates.
This might not be a part most would consider, but it’s something to focus on. Like other technology, there are both reputable brands and startup brands. A trusted brand includes known defects and benefits; a startup brand can perhaps have better technology, but could also have unknown technological issues. Depending upon your system needs, you might decide to go with a well-reviewed firm or one that is brand new to the market.