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 purchasing your new battery (to make certain you get the most bang for your buck)!
When picking a battery (or batteries) to your solar panel system, there are three categories of batteries which 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) Assess the components of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and maker.
By the conclusion of the article you will know exactly how to pick out the best battery to 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 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 one of the longest-used and most reliable batteries in existence. When compared with the other batteries we’ll 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 if you are just making the transfer to a solar panel system, lead acid batteries might be a very good option. They’re the type of battery we use in the majority of the battery banks within our solar panel systems.
Saltwater batteries are more expensive than lead acid batteries, but also have a better lifespan. Contrary to lead acid batteries, saltwater batteries are basically brand new to the market and stay both somewhat untested and more difficult to come across. Of the 3 types of batteries, saltwater has the greatest depth of discharge, so 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. Comparing all three options, the lithium 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. 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 explore to find the perfect battery for your system.
Cost is probably one of the more obvious elements. But the old saying,”you get what you pay for” holds true when purchasing 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 many systems, a battery will cycle daily, meaning it is going to drain and charge regularly. With each cycle, the battery’s ability to hold the identical 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 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.
Length of Discharge
Length of release is how much you can drain the battery down 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. Basically, a battery with a 90% depth of discharge per cycle will provide 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 a high capacity and high power can run a massive system for several hours; a battery with low capacity and high power can run a large system but just for a brief time.
Efficiency is the amount of energy used compared to the quantity of energy it took to save said energy. Batteries require power to control and efficiency compares the energy taken to control a battery with the amount of energy which the charged battery generates. The higher the efficiency, the more cost-effective the battery.
This might not be a part most would consider, but it is something to focus on. Like other technology, there are both reputable brands and startup brands. A trusted brand comes with known defects and advantages; a startup brand can perhaps have better technology, but could also have yet unknown technological issues. Based on your system needs, you might decide to go with a well-reviewed company or one that is brand new to the market.