lead carbon battery - best batteries for off grid solar

Off-Grid Solar Batteries: Lead Acid vs Lithium

When it comes to setting up your own off-grid solar system, there are typically three solutions to the question of how to store all that energy: Lithium Ion, and Sealed Lead-Acid. Each presenting a mixture of pros and cons, it can be tricky to decide which will best suit the specific needs of each system. Here we will try to highlight some of the strengths, weaknesses, and ideal uses for each of these forms of battery.

When it comes to setting up your own off-grid solar system, the best battery for solar energy off grid solar depends on your needs. Learn more about the differences between a Lead Acid Battery and a Lithium Iron battery. We highlight some of the strengths, weaknesses, and ideal uses for each of these batteries below.

Off Grid Solar Battery Types

These are the typical two solutions to the question of how to store all that energy generated by an off grid solar system and each presents a mixture of pros and cons.

Lead Acid Battery

Firstly, with the Lead Acid Gel Deep Cycle Battery, we have an affordable workhorse. Designed with a greater Depth of Discharge than most GEL batteries, and a focus on high capacity, this is the best battery for solar energy storage in smaller scale off-grid solar power systems, such as baches and cabins. Higher temperature resistance also makes these sealed Lead-Acid batteries the best choice for anyone anticipating extreme weather, with an effective discharge range from -40​°​ C​ ~60​°​ C.​    

With a lifespan of 3-5 years, depending on the specific battery and usage, this battery has an estimated cycle life of 1422 cycles at 50% D.o.D. This is a very affordable option to use while waiting for other battery options to develop and drop in price.

Lithium Iron

Lithium-Iron batteries, sometimes called LiFePO4 for their chemical makeup, are a comparably very expensive option. By no means a worse investment, lithium-iron batteries are designed to operate under heavy use, long term, with no maintenance. As such, they make back the initial expense over their much longer 10-15 year lifespan, when compared to Lead batteries. They’re also significantly lighter, making them a great option for weight-sensitive situations.

Learn more about our Lithium batteries here.

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What is the best battery for solar energy off-grid?

So what is the best battery for off-grid solar? Our standard 200Ah Gel Deep Cycle Battery is a workhorse that is popular with our customers and offers a balance of being a great battery at an affordable price with a lifespan of 3-7 years if treated good to well.

However, the best batteries for off grid solar depends on your particular uses as each type of battery outlined above offers strengths and weaknesses. The Gel Deep Cycle battery, as the cheapest option available, is suited to small scale solar operations. These smaller scale systems will avoid overly taxing the lower charge available to these batteries and get the most use out of them in the long run. However, when the requirements are as high as that of a full time, off-grid residence, Lithium-Ion batteries can become a more economical solution, for their longevity and effective charge. We offer the GEL batteries as standard in all our kits to ensure they remain an affordable option, though all kits can be upgraded to use our other batteries.