Nexus 6P Battery Issue Fix

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) to your solar panel system (or off-grid energy 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 buying your new battery (to make certain 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 which work best.    We will do this in two parts:

Part 1)   Instantly compare the three main types of solar batteries (lead acid, saltwater, and lithium).   And,

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

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 get started…

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 are also among the longest-used and most reliable batteries in existence.  When compared with the other batteries we will 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 lots of storage for a lesser price, or if you are simply making the move to a solar panel system, lead acid batteries might be a very good option.  They’re the type of battery we use in most 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 industry 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 find 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 battery may be the highest rated, but also the most expensive.  A good example of a lithium battery is the Tesla Powerwall.

Part 2) Assess the components of batteries.  As soon as 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 explore to find the perfect 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 as well.  In some instances 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 daily, meaning it will charge and drain regularly.  With every cycle, the battery’s ability to hold the same charge lessens slightly.  So 1 component to consider is the warranty on the battery which guarantees a specific 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 application, you can extend the life of your batteries.

Length of Discharge

Length of release is how much you can drain the battery down before needing to recharge the battery without damaging its life.  Certain solar batteries can be depleted further 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 compared to a battery with less.

Ability and Power

Measured in kilowatt hours (kWh), capacity is the amount of energy a battery can store over time. The more capacity a battery has, the more power it can store.   Power is how much energy a battery can provide at a certain moment.  A battery with a high capacity and high 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 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 charge and efficiency compares the energy taken to control a battery with the amount of energy which the charged battery generates.  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 trusted brands and start-up brands.  A trusted brand comes with known defects and advantages; a start-up brand can perhaps have better technology, but can also have yet unknown technological difficulties.  Depending on your system needs, you may decide to go with a well-reviewed firm or one that is brand new to the market.