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 provide you specific things to check on before buying your new battery (to ensure 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 which work best. We’ll do this in 2 parts:
Part 1) Quickly compare the three main 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 manufacturer.
By the end of this article you will know just how to pick 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 depend on what you’re looking for. So the first decision to make is the type 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’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 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 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 better lifespan. Unlike lead acid batteries, saltwater batteries are essentially brand new to the industry and remain both somewhat untested and more difficult to come across. Of the three kinds of batteries, saltwater has the greatest depth of discharge, which means you’ll get the most output per charge 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 components 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 research to find the perfect battery to 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. In some instances though, certain batteries could be overkill for your system so the most expensive battery might not be the ideal choice always.
For many systems, a battery will cycle every day, 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 guarantee 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 at the EZ Battery Reconditioning program, you can extend the life of your batteries.
Depth of Discharge
Length of release is how much you can drain the battery down 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. Essentially, a battery with a 90% depth of discharge per cycle will provide more battery power per charge compared to 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 large system for several hours; a battery with low capacity and higher 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 store energy. Batteries require power to charge and efficacy 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.
This might not be a part most would consider, but it is something to pay attention to. As with other technologies, there are both reputable brands and start-up brands. A trusted brand includes known defects and advantages; a startup brand can perhaps have better technology, but can also have yet unknown technological difficulties. Based on your system needs, you may decide to go for a well-reviewed company or one that is brand new to the market.