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 provide you specific things to check on before purchasing your new battery (to ensure you get the most bang for the buck)!
When choosing a battery (or batteries) to your solar panel system, there are 3 categories of batteries which work best. We’ll do this in two parts:
Part 1) Instantly compare the three chief types of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Assess the components of batteries, such as: depth of discharge, power and capacity, efficiency, battery life, and manufacturer.
By the conclusion of the article you will know exactly how to pick out the best battery for 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.
They’re also one of the longest-used and most reliable batteries in existence. Compared to the other batteries we will 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 lesser price, or whether you are just making the transfer 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 within our solar panel systems.
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 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. Their depth of discharge is less than that of a saltwater battery, but more than that of a lead acid battery. Comparing all three choices, the lithium ion battery may be the highest rated, but also the most expensive. A good example of a lithium ion battery is the Tesla Powerwall.
Part 2) Compare the elements of batteries. Once you’ve picked 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 to your system.
Price is probably one of the more obvious components. But the old saying,”you get what you pay for” holds true when buying 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.
For most systems, a battery will cycle every day, meaning it is going to charge and drain regularly. With every cycle, the battery’s ability to maintain the identical charge lessens slightly. So 1 component to consider is the warranty on the battery that 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 in the EZ Battery Reconditioning program, you can extend the life of your batteries.
Length of Discharge
Length of release is how much you can drain the battery before needing to recharge the battery without harming its life. Particular 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 than 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 certain moment. A battery with both a high capacity and high power can run a large system for several hours; a battery with low capacity and high power can run a large system but only for a short time.
Efficiency is the amount of energy used compared to the quantity of energy it took to save 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.
This might not be a component most would consider, but it is something to pay attention to. As with other technology, there are both reputable brands and startup brands. A trusted brand includes known defects and benefits; a startup brand can perhaps have better technology, but could also have yet unknown technological issues. Depending upon your system needs, you may decide to go for a well-reviewed firm or one that is brand new to the market.