Pixel Battery Drain 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 better than another?  If so, this report 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 your buck)!

When picking a battery (or batteries) for your solar panel system, there are 3 categories of batteries that work best.    We will do this in 2 parts:

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

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

By the end of the article you will know exactly how to pick the best battery to your solar panel system!

So let’s get started…

So the first decision to make is the sort of battery that will fit your system.

Lead Acid Batteries

They’re also among the longest-used and most reliable batteries in existence.  Compared to 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 lots of storage for a lower price, or if you are simply making the move 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 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 three kinds of batteries, saltwater has the greatest depth of discharge, so you’ll find the most output per charge before needing to recharge.

Lithium Batteries

Lithium batteries are the most expensive and the longest lasting of the three types of solar batteries.  Comparing all three choices, 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 elements of batteries.  Once you’ve chosen 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 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.  Sometimes though, certain batteries could be overkill for your system so the most expensive battery may not be the ideal choice always.

Battery Life and Warranty

For many systems, a battery will cycle every day, meaning it is going to drain and charge regularly.  With each cycle, the battery’s ability to maintain the identical charge lessens slightly.  So one component to consider is the guarantee on the battery which 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 program, you can extend the life of your batteries.

Depth of Discharge

Depth of discharge is how much you can drain the battery down before needing to recharge the battery without damaging its life.  Particular solar batteries may 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 that a battery can provide at a given moment.  A battery with both a high capacity and high power can run a massive 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 said 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’s something to focus on.  As with other technology, there are both trusted brands and start-up brands.  A trusted brand comes with known defects and advantages; a startup brand can perhaps have better technology, but could also have unknown technological difficulties.  Depending upon your system demands, you might decide to go for a well-reviewed firm or one that is brand new to the market.