S9 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 greater 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 the buck)!

When choosing a battery (or batteries) for your solar panel system, there are three 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 elements of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and maker.

By the end of this article you will know exactly how to pick out the ideal battery to your own solar panel system!

So let’s begin…

Part 1) The Three Best Types Of Batteries For Solar Panel Systems: The best type of battery for your solar panel system will be dependent on what you’re looking for. So the first decision to make is the sort of battery that will fit your system.

They’re 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’re the cheapest option but you trade price for some battery life and depth of discharge.  But for homeowners needing a great deal of storage for a lower cost, or whether you are simply making the transfer 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 within 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 basically brand new to the market and stay both somewhat untested and more difficult to come across.  Of the three kinds of batteries, saltwater has the greatest depth of discharge, which means 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 kinds of solar batteries.  Comparing all three options, the lithium battery may be the highest rated, but also the most expensive.  An example of a lithium 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 components to explore to find the perfect 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 also.  In some instances though, certain batteries could be overkill for your system so the most expensive battery might not be the ideal choice always.

For most systems, a battery will cycle daily, meaning it will drain and charge regularly.  With every cycle, the battery’s ability to hold the identical charge lessens slightly.  So one component to consider is the warranty on the battery that guarantees a certain number of cycles of useful life.  But keep 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

Depth of discharge 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.

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 high power can run a large system but only for a short time.

Efficiency

Efficiency is the amount of energy used compared to the amount of energy it took to save energy.  Batteries require power to charge and efficiency compares the energy taken to charge a battery with the amount of energy that the charged battery produces.  The higher the efficiency, the more cost-effective the battery.

Manufacturer

This might not be a component most would consider, but it’s something to focus on.  Like other technologies, there are both reputable brands and start-up brands.  A trusted brand comes with known defects and advantages; a start-up brand can perhaps have better technology, but could also have unknown technological difficulties.  Depending on your system demands, you may decide to go for a well-reviewed firm or one that is brand new to the market.