Have you ever wondered how to pick out the best battery(s) for 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 report 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 picking a battery (or batteries) for your solar panel system, there are 3 categories of batteries that work best. We’ll do this in two parts:
Part 1) Quickly 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 maker.
By the conclusion of the article you will know just how to pick the ideal battery for your own solar panel system!
So let’s get started…
So the first decision to make is the type of battery that will fit your system.
Lead acid batteries are the most commonly used rechargeable battery in the world. They’re also among the longest-used and most dependable batteries in existence. When compared with the other batteries we’ll 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 a great deal of storage for a lesser cost, 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 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 types 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 are the most expensive and the longest lasting of the three kinds of solar batteries. Comparing all three choices, 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 elements of batteries. As soon as you’ve picked 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 ideal battery for your system.
Price 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 might not be the ideal choice always.
For most systems, a battery will cycle every day, meaning it will drain and charge regularly. With every cycle, the battery’s ability to hold the identical charge lessens slightly. So 1 component to consider is the guarantee on the battery that guarantees a specific number of cycles of useful life. But bear in mind that if 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 farther 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.
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 that a battery can provide at a given moment. A battery with both a high capacity and high power can run a large system for many hours; a battery with low capacity and high power can run a large system but just for a short time.
Efficiency is the amount of energy used compared to the quantity of energy it took to save said 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 produces.
This may not be a component most would consider, but it is something to pay attention to. As with other technologies, there are both trusted brands and start-up brands. A trusted brand includes known flaws and benefits; a startup brand can perhaps have better technology, but can also have unknown technological issues. Based upon your system demands, you may decide to go with a well-reviewed company or one that is brand new to the market.