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 better than another? If so, this article will answer these questions and give you specific things to check on before purchasing your new battery (to make certain you get the most bang for your buck)!
When choosing a battery (or batteries) for your solar panel system, there are 3 categories of batteries that work best. We will do this in two parts:
Part 1) Instantly compare the three main kinds of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Compare the elements of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and maker.
By the conclusion of this article you will know exactly how to pick out the best battery to your 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.
Lead Acid Batteries
They’re also one of the longest-used and most dependable batteries in existence. When compared with the other batteries we will discuss in this report; they are the cheapest option but you trade price for some battery life and depth of discharge. But for homeowners needing lots of storage for a lower price, 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 most of the battery banks within our solar panel systems.
Saltwater batteries are more expensive than lead acid batteries, but also have a greater 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 best depth of discharge, which means you’ll find the most output per fee 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 is probably 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 own solar panel or off-grid system (that meets your system’s needs), there are elements to research to find the perfect battery to your system.
Cost is probably one of the more obvious elements. 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 may not be the best choice always.
For most systems, a battery will cycle daily, meaning it will charge and drain regularly. With each 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 specific 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 application, you can extend the life of your batteries.
Length 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 can be depleted farther 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 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 save. Power is how much energy a battery can provide at a given moment. A battery with both a high capacity and higher power can run a large system for many hours; a battery with low capacity and high power can operate a large system but just for a short time.
Efficiency is the amount of energy used compared to the amount of energy it took to store 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 generates.
This might not be a part most would consider, but it is something to pay attention to. Like other technology, there are both trusted brands and startup brands. A trusted brand comes with known defects and benefits; a start-up brand can perhaps have better technology, but can also have yet unknown technological issues. Depending upon your system demands, you may decide to go with a well-reviewed firm or one that is brand new to the market.