How To Fix Loose Battery Connection

How To Pick Out The Best Battery For a Solar Panel System, Battery Bank, or Off-Grid System

Have you ever wondered how to pick out the best battery(s) for your solar panel system (or off-grid energy system)? 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 that work best.    We’ll do this in two parts:

Part 1)   Quickly compare the three chief kinds of solar batteries (lead acid, saltwater, and lithium).   And,

Part 2)   Assess the components of batteries, such as: depth of discharge, power and capacity, efficiency, battery life, and maker.

By the conclusion of this article you will know exactly how to pick out the best battery for your 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 type of battery that will fit your system.

Lead Acid Batteries

They’re also one of the longest-used and most dependable batteries in existence.  Compared to the other batteries we will discuss in this report; they are 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 whether you are simply making the move to a solar panel system, lead acid batteries might be an excellent option.  They’re the type 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 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 three kinds 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 types of solar batteries.  Comparing all three options, the lithium ion battery is probably the highest rated, but also the most expensive.  A good example of a lithium battery is the Tesla Powerwall.

Part 2) Compare the elements of batteries.  As soon as 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 ideal battery for your system.  

Cost

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

For many systems, a battery will cycle every day, meaning it will charge and drain 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 that guarantees a certain number of cycles of useful life.  But keep 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 before needing to recharge the battery without harming its life.  Certain 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 certain moment.  A battery with both a high capacity and high power can run a large system for many hours; a battery with low capacity and higher power can run a large system but only for a short time.

Efficiency

Efficiency is the amount of energy used compared to the quantity of energy it took to save energy.  Batteries require power to control and efficacy compares the energy taken to control a battery together with the amount of energy that the charged battery produces. 

Manufacturer

This may not be a component most would consider, but it is something to pay attention to.  As with other technologies, there are both trusted brands and startup brands.  A trusted brand comes with known flaws and advantages; a startup brand can perhaps have better technology, but could also have unknown technological issues.  Depending upon your system demands, you may decide to go for a well-reviewed firm or one that is brand new to the market.