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 buying 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 will do this in 2 parts:
Part 1) Quickly compare the three chief kinds of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Compare the components of batteries, such as: depth of discharge, capacity and power, efficiency, battery life, and maker.
By the end of this article you will know just how to pick the ideal battery for 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. There are three battery types that work exceptionally well; however, each battery type has pros and cons. So the first decision to make is the type of battery that will fit your system.
Lead Acid Batteries
They’re also among 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 trade price for some battery life and depth of discharge. But for homeowners needing lots of storage for a lower price, or if you are just 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 in our solar panel systems.
Saltwater batteries are more expensive than lead acid batteries, but also have a better lifespan. Unlike lead acid batteries, saltwater batteries are basically brand new to the market and remain both somewhat untested and more difficult to come across. Of the 3 kinds of batteries, saltwater has the greatest depth of discharge, so 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 types 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 battery is probably the highest rated, but also the most expensive. An example of a lithium battery is the Tesla Powerwall.
Part 2) Compare 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 components to explore to find the ideal 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 could be overkill for your system so the most expensive battery may not be the best choice always.
Battery Life and Warranty
For most systems, a battery will cycle daily, meaning it is going to drain and charge regularly. With every cycle, the battery’s ability to hold the same charge lessens slightly. So 1 component to consider is the guarantee on the battery which 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
Depth of discharge is how much you can drain the battery before needing to recharge the battery without harming its life. Particular solar batteries may be depleted further than others, allowing for more use between charging. Essentially, a battery with a 90% depth of discharge per cycle provides more battery power per charge than a battery with less.
Capacity and Power
The more capacity a battery has, the more power it can store. Power is how much energy a battery can provide at a given 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 is the amount of energy used compared to the quantity of energy it took to save said energy. Batteries require power to control and efficacy compares the energy taken to control a battery with the amount of energy that the charged battery generates. The higher the efficiency, the more cost-effective the battery.
This may not be a part most would consider, but it is something to pay attention to. Like other technologies, there are both reputable brands and start-up 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 difficulties. Based on your system needs, you may decide to go with a well-reviewed company or one that is brand new to the market.