Note 4 Battery Problem Fix

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 article will answer these questions and give you specific things to check on before purchasing your new battery (to ensure you get the most bang for your buck)!

When choosing a battery (or batteries) to your solar panel system, there are 3 categories of batteries which work best.    We’ll do this in 2 parts:

Part 1)   Quickly compare the three main kinds 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 manufacturer.

By the conclusion of the article you will know exactly how to pick the ideal 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 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.  Compared to the other batteries we’ll 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 price, or if you are simply making the move to a solar panel system, lead acid batteries may be a very good option.  They’re the sort of battery we use in the majority of the battery banks in our solar panel systems.

Saltwater batteries are more expensive than lead acid batteries, but also have a better lifespan.  Unlike lead acid batteries, saltwater batteries are essentially brand new to the market and stay both somewhat untested and harder to come across.  Of the three kinds of batteries, saltwater has the best depth of discharge, which means 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 may be the highest rated, but also the most expensive.  A good 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 own solar panel or off-grid system (that meets your system’s needs), there are elements to research to find the ideal battery to your system.  

Cost

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.  Sometimes though, certain batteries may be overkill for your system so the most expensive battery might not be the best choice always.

Battery Life and Warranty

For most systems, a battery will cycle every day, meaning it is going to drain and charge regularly.  With each cycle, the battery’s ability to hold the identical charge lessens slightly.  So 1 component to consider is the guarantee on the battery which guarantees a certain number of cycles of useful life.  But bear in mind that when you use the maintenance and reconditioning methods we teach you in 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 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.  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 a high capacity and higher power can run a massive system for many hours; a battery with low capacity and higher power can operate 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 store energy.  Batteries require power to control and efficacy compares the energy taken to control a battery with the amount of energy that the charged battery generates. 

Manufacturer

This might not be a part most would consider, but it is something to pay attention to.  Like other technologies, there are both reputable brands and start-up brands.  A trusted brand includes known flaws and benefits; a start-up brand can perhaps have better technology, but can also have yet unknown technological issues.  Based upon your system needs, you might decide to go for a well-reviewed company or one that is brand new to the market.