Fix Phone Battery

Or have you wondered what makes one deep cycle battery better than another?  If so, this article will answer these questions and give you specific things to check on before buying your new battery (to ensure you get the most bang for the buck)!

When picking a battery (or batteries) to your solar panel system, there are 3 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, capacity and power, efficiency, battery life, and manufacturer.

By the end of the article you will know exactly how to pick the best battery for 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 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 exchange price for some battery life and depth of discharge.  But for homeowners needing a great deal of storage for a lesser cost, or if you are just making the transfer to a solar panel system, lead acid batteries may be an excellent option.  They’re the sort of battery we use in the majority of the battery banks in our solar panel systems.

Saltwater Batteries

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 harder to come across.  Of the 3 types of batteries, saltwater has the best depth of discharge, so you’ll get the most output per fee before needing to recharge.

Lithium Batteries

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 options, the lithium ion battery may be the highest rated, but also the most expensive.  An example of a lithium ion battery is the Tesla Powerwall.

Part 2) Compare 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 elements to explore to find the perfect battery for your system.  

Cost

Price is probably one of the more obvious elements.  But the old saying,”you get what you pay for” holds true when buying batteries also.  In some instances though, certain batteries may be overkill for your system so the most expensive battery may not be the best choice always.

Battery Life and Warranty

For most systems, a battery will cycle every day, meaning it is going to charge and drain 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 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 application, 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 harming its life.  Particular solar batteries may be depleted further than others, allowing for more use between charging.  Basically, 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

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 higher power can run a massive system for several hours; a battery with low capacity and high power can operate a large system but only for a brief time.

Efficiency

Efficiency is the amount of energy used compared to the amount of energy it took to store said 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.  The higher the efficiency, the more cost-effective the battery.

Manufacturer

This may not be a component most would consider, but it’s something to pay attention to.  As with other technology, there are both trusted brands and startup brands.  A trusted brand includes known flaws and advantages; a startup brand can perhaps have better technology, but can also have yet unknown technological difficulties.  Based on your system needs, you may decide to go with a well-reviewed company or one that is brand new to the market.