5 Best Batteries For Solar System 2020

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Solar panel systems are an excellent thing to invest in thanks to the long term effects and benefits. As the years go on, you’ll start to see that you’re actually saving money on the cost of your energy as well as helping the environment by generating your own energy. The idea of a solar panel system is a great one, however it still is a big investment to make due to the large start up costs. 

If you’re looking to set up your own solar panel system, you’re definitely going to need at least one solar battery to actually power it up. While these are desirable for anyone with a solar power system installed on their RV or campervan, they are vital for people wanting to live off the grid or don’t have access to mains electricity.

Solar batteries store the solar energy that your panels collect and generate throughout the daylight hours so that none of it is wasted and you can use it during the night or on days where there is little sunlight to collect. Chances are you’re not going to be able to use all of the energy as it comes in through the day, so deep cycle solar batteries are a very helpful and beneficial piece of equipment for anyone with a solar panel system. 

Our Favorite Picks

Name

Battery Type

AGM, Lead Acid

AGM, Lead Acid

AGM, Lead Acid

AGM, Lead Acid

AGM, Lead Acid

Capacity

33Ah, 12V

100Ah, 12V

12Ah, 12V

100Ah, 12V

100Ah, 12V

Dimensions

7.7 x 5.2 x 6.3 inches

13 x 6.8 x 9 inches

5.9 x 3.9 x 4.0 inches

13 x 6.8 x 8.7 inches

16.4 x 12.8 x 12.6 inches

Weight

23.8 pounds

66 pounds

8.4 pounds

66 pounds

60 pounds

Ratings

4.2 out of 5

4.1 out of 5

4.5 out of 5

4.5 out of 5

4.3 out of 5

Number of Reviews

303

85

295

94

452

Warranty

One Year

Two Years

One Year

One Year

One Year


Let’s take a deeper look at our top five deep cycle solar batteries chosen from the current market. To really give you the whole picture of each one, we’ve included each of their specifications and notable features as well as a few pros and cons to help you make your decision of which one will enrich your life the most.

5 Best Batteries For Solar System 2020 - Comparison Table

5 Best Batteries For Solar System 2020 - Reviews

Our first pick has to be the ExpertPower 12V 33Ah Rechargeable Deep Cycle Battery thanks to its great features and high rating and good customer reviews. This AGM, or Absorbent Glass Matt, battery is actually considered one of the best sealed lead acid models on the market currently, so you can’t really go wrong with this one. Let’s have a look at why we’ve chosen this as our favorite. 

Firstly, this model is quite small so it won’t take up too much space wherever you want to install it. Moreover, it features super easy one-time installation, making installation of this battery almost foolproof. This valve-regulated battery is marketed as maintenance free, which is a strong claim to make. However, even if it is not completely free of maintenance needs, they will be very minimal so won’t take up much of your time at all. 

Another reason we like this battery so much is the fact that the temperature range is very generous so you can depend on the ExpertPower 12V 33Ah Rechargeable Deep Cycle Battery in all sorts of conditions, and it’s unlikely that you’ll ever find it overheating.

The 12 volt 33 amp/10 hour cycle shows that this battery can be used for an impressive amount of time before having to be recharged thanks to the high capacity. Moreover, the durable exterior allows this battery to be used exposed to harsh weather conditions while keeping it well protected. 

Features:

  • At 12V/2A the battery has a 20 hour charging time. 
  • Can be used in a wide range of temperatures while remaining operational. 
  • Easy to install. 
  • Maintenance free. 
  • Made from AGM technology. 
  • Certified in CE, DOT, ISO 9001, ISO 14001, ISO 18001 and UL.

Specifications:

  • Voltage: 12V
  • Capacity: 33Ah / 10 hour
  • Weight: 23.81 pounds
  • Dimensions: 7.72 x 5.16 x 6.34 inches
  • Exterior Material: B2
  • Charging Time: 20 hours - 12V/2A smart charger
  • Cell Type: Sealed Lead Acid
  • Safety: CE, DOT, ISO 9001, ISO 14001, ISO 18001 and UL certified. 
  • Operation Temperature: Discharge: -40 °F to +140 °F, Recharge: 4 °F to 122 °F
  • Lifespan: 3 to 5 years

Pros:

  • Attractive price point. 
  • Durable and tough design which helps prevent accidental damages. 
  • Lives up to Goal Zero Yeti 400.
  • Great to use with solar panels.

Cons:

  • Not fully sized as a battery.
  • There is no recommended charger.

You’ll be able to use your ​Renogy Deep Cycle AGM Battery in almost any condition or circumstance. The versatility of this AGM solar battery affects the weight and size of the model, so be cautious that this isn’t the most portable battery. This also indicates that it’ll take up a lot of space, so it is not advised to choose this model if you have a smaller area designated for your solar battery. 

Having said that, it is still very easy to install. In fact, you could probably install it without any prior knowledge of the action at all. As well as the ease of installation and getting it up and running, the ​Renogy Deep Cycle AGM Battery also requires almost no maintenance or monitoring. If you’re looking for a battery which you can hook up and leave to its own devices, this is an excellent choice for you. 

Renogy’s solar battery offers a capacity of 100Ah at a ten hour rate to 10.8V at 25°C. This means that it’s reasonably fast charging and can hold its charge for a long time before having to be recharged. This also means that it is rather efficient and a great choice of solar battery overall, considering it is an AGM model.

The 50% DOD Cycle Life is 600 cycles, which is considered impressive for an AGM type of battery. Overall, the ​Renogy Deep Cycle AGM Battery is durable, easy to use and keep running, cost effective and offers a good capacity, meaning it is a great option for a lot of different people.

Features:

  • Designed to be leak, monitoring and maintenance free. 
  • Usable even at freezing temperatures. 
  • Can charge and power a number of small appliances for varied amounts of time. 
  • Handles for easy handling and maneuvering.

Specifications:

  • Voltage: 13V
  • Capacity: 100Ah / 10 hours
  • Weight: 66 pounds
  • Dimensions: 13.0 x 6.8 x 9.0 inches
  • Exterior Material: ABS
  • Charging Time: Approximately 10 hours - 14V/10A
  • Cell Type: Sealed Lead Acid
  • Safety: CB, UL, CE, ISO 14001 and ISO 9001 Certified. 
  • Operation Temperature: Discharge: -15 °F to +50 °F, Recharge: 0 °F to 40 °F
  • 50% DOD Cycle Life: 600 Cycles

Pros:

  • Sealed to ensure that no maintenance is required. 
  • The battery holds a lot of charge for a prolonged period of time. 
  • Made of Pb-Ca alloy which is durable and resistant to corrosion. 

Cons:

  • Rather heavy so the installation process is made harder. 
  • Not as portable as lightweight and smaller options. 

The Mighty Max Deep Cycle Rechargeable Battery is a great budget friendly option thanks to its smaller size and impressive efficiency. For the price of one you’re actually getting two batteries, which offers twice the power as other alternative options. Although they’re not the highest quality of battery on our list, the fact that you get two for the low price makes up for this in a way. 

In fact, considering the low price point, the quality is actually something to be admired of these batteries. This model is designed to be spill-proof, it works well in extreme temperatures, it is reasonably easy to install, the discharge recovery is impressive and the longevity of its life is surprising. These are just a few of the benefits that come with the ​Mighty Max Deep Cycle Rechargeable Battery. 

Although it won’t perform quite as well as a more expensive alternative, choosing this model will get you two decent batteries for a very attractive price.

Features:

  • Two Sealed Lead Acid (SLA) rechargeable batteries which require little to no maintenance. 
  • Can be mounted any way you desire. 
  • Shock and vibration resistant. 
  • Deeper discharge allowed thanks to the thicker plates of the ML12.
  • The discharge is much slower than that of a flooded battery.

Pros:

  • Very easy to install. 
  • Lightweight.
  • Proven to be very efficient for scooters. 
  • High rate of discharge. 

Cons:

  • There is no specification available for you to compare before buying.
  • No recommended charger available.

From the most budget friendly to one of the more expensive solar batteries on our list, the WindyNation AGM Deep Cycle Sealed Lead Acid Battery is considered one of the best models on the market for off the grid adventures. This AGM battery is considered one of the best of its kind, so if you’re looking for this particular type of battery, you cannot go wrong with WindyNation’s model. 

In one ten hour rating this battery can provide up to 100-AMP hours, which is considered pretty impressive by our standards. The energy capacity is large and this model is overall very efficient with low discharge rates while not being used. These are just a few of the features that make this an excellent solar battery for anyone who has a higher budget.

The WindyNation AGM Deep Cycle Sealed Lead Acid Battery uses virgin lead which helps in keeping its discharge rates low as well as the capacity high and the longevity of its life impressive. This model’s plates are thick and durable to encourage deep discharges over and over again. What’s more is that you’ll get a one year warranty along with it to prevent you wasting your money due to any unexpected faults, the maintenance required is minimal and you can install it very easily. 

Features:

  • The lead used during the manufacturing process is 99.995% pure, allowing for extremely low discharge rates when not in use. 
  • Great performance and lifespan compared to its lead acid battery competitors. 
  • Sealed exterior prevents spillages. 
  • Ideal for using off the grid or for emergency power solutions.

Specifications:

  • Voltage: 12V
  • Capacity: 100Ah per 10 hours
  • Weight: 62.8 pounds
  • Dimensions: 12.17 x 6.6 x 8.3 inches
  • Exterior Material: ABS
  • Charging Time: Approximately 14 hours - 14V/10A
  • Cell Type: Sealed Lead Acid
  • Safety: IEC, UL and CE Certified, 
  • Operation Temperature: Discharge: +5 °F to +122 °F, Recharge: 32 °F to 104 °F
  • 50% DOD Cycle Life: 550 Cycles

Pros:

  • No maintenance required. 
  • Good customer service.
  • Well designed with a small sized body and carry handles that can be tucked away easily. 
  • Multiple different connection options - 5/16 inch thread or an SAE automotive post. 

Cons:

  • High price point. 
  • Quite heavy weight at 62.8 pounds.

Finally, the final product on our list is the Universal 12V 100Ah Deep Cycle AGM Battery, a very durable and reliable solar battery which can be mounted in any position you could possibly need. This versatility allows this solar battery to be a great fit for almost anyone who owns a solar power system. 

It’s all good and well having a battery that you can stand on its head if needed, but what about installing and mounting? There’s no use choosing a battery that is going to be too hard to actually set up in your RV or campervan, and luckily this battery from Universal Power Group is extremely easy to set up and install. Moreover it is shock resistant and durable to natural bumps and vibrations from your vehicle. The impact resistance is high and you can use it during any hot or cold temperature. 

Other advantages of this battery are the fact that it is spill proof and you won’t have to spend too much time maintaining it. Although the battery isn’t considered lightweight or small in structure, these are two slight drawbacks that can be easily overlooked thanks to the durability, efficiency and low price point. The charging time is also quite long compared to other models, but it’s also definitely not the worst. This can also be said for the energy discharge while not in use and the overall battery capacity.

Features:

  • Shock, heat, vibration and chemical resistant.
  • Maintenance free battery which is also spill proof. 
  • C.A.B, UL and ISO9001 certified.
  • DOT 60 classified.
  •  Reliable power source for emergency appliances.

Specifications:

  • Voltage: 12V
  • Capacity: 93Ah / 10 hour
  • Weight: 64 pounds
  • Dimensions: 12.2 x 6.6 x 8.3 inches
  • Exterior Material: ABS
  • Charging Time: Approximately 12 hours - 14V/10A
  • Cell Type: Sealed Lead Acid
  • Safety: C.A.B, UL and ISO9001 certified
  • Operation Temperature: Discharge: 5 °F to 113 °F, Recharge: 32 °F to 104 °F
  • 50% DOD Cycle Life: 550 Cycles

Pros:

  • Resistant to harsh movements. 
  • Sealed battery with little maintenance required. 
  • Low discharge rate while not in use. 
  • Can be used for long periods of time before needing to be recharged.

Cons:

  • Quite hard to mount in small spaces. 
  • Heavy weight of 64 pounds makes it difficult to move or install. 

5 Best Batteries For Solar System 2020 - Buyers Guide

Choosing the correct batteries for your individual solar system is very important as they are all different and require different levels of storing capabilities and energy efficiency. They also come with varying levels of cost effectiveness, which is an important consideration unless you’re in the business of spending more money than you need to. 

Moreover, the ease of installation, lifespan, storage space and cost are just some of the other considerations to think about when choosing the right battery for you. Below we’ll be outlining all of these features to consider before choosing your new solar battery to ensure you get the best one possible for you. Let’s dive right into it, shall we? 

Types of solar batteries

Knowing which battery will suit your needs best will greatly improve your chances of choosing the optimal solar battery for your individual preferences and lifestyle. For example, if you need a fast charging battery and choose the wrong type which takes a whole day to charge, you’re most likely going to have to buy a different one to have a second attempt at choosing the correct model. Knowing which type of battery you need is going to save you a lot of time, money and frustration, so it is vital you do your research beforehand.

Luckily for you, we’ve actually done this for you and have listed the four different types of solar batteries that work well with solar panel systems for you to choose from.  

Gel Batteries

Granted, gel batteries are not the most popular type of solar battery on the market thanks to the larger number of drawbacks for them compared to other types, and the amount of advantages aren’t impressive enough to overrule this. Having said this, gel batteries use fumed silica to make the cells tougher as the electrolytes were thickened substantially. This thickness also prevents the battery from becoming damaged and dangerous should an accident occur. This type of battery is much less likely to leak after a nasty drop. 

Other beneficial features of gel batteries is that they require little maintenance, they’re shock resistant and they’re very durable. You can use them in extreme climate conditions and they also have great long lifetimes without you having to do too much to help them. 

Perhaps the most important drawback to consider about gel batteries is that their charging profile is quite narrow and you’ll have to make sure you don’t accidentally overcharge them or charge them incorrectly, as this is an efficient and quick way to damage them. Other drawbacks are the smaller amp-hour capacity and the higher than average price point. 

Flooded Lead Acid Batteries

Flooded lead acid is among the most common types of battery for people to use while living off the grid. Their more common name is wet cell batteries, which you may have heard of. This type of battery often needs more maintenance and monitoring to prevent it from suffering from corrosion. They also need to be kept in the right environment and positioned correctly to prevent leakages. 

The benefits of flooded lead acid batteries are that they are relatively inexpensive in comparison to other types, they’re considered safe to use and they’re rather reliable for many people to use over and over again. 

However, the main disadvantages are that they are usually large and therefore take up much more space than other alternatives, and that you’re more likely to find corrosive damage on this type of battery. Having said this, you can prevent corrosion from occurring so it is not necessarily a deal breaker. 

If you’d prefer a battery that doesn’t need much work to keep up and running, this may not be the best type for you and you may benefit more from an AGM battery. However, if you don’t mind putting in the extra work, a flooded lead acid battery is an excellent option to go for.

AGM (Sealed Lead Acid) Batteries

Absorbent Glass Matt (AGM) batteries is another type of lead battery, however the differing factor opposed to flooded lead acid batteries is that the electrolytes are absorbed into a glass matt, hence the name. The plates are often either flat or wound into a spiral shape. 

Perhaps the biggest advantage is that AGM batteries have lower resistance internally in comparison to a flood lead battery, as well as the fact that they are considered better at performing in extreme temperatures and their discharge rates are not as slow as alternative battery types. 

AGM batteries can hold static charges for an impressive amount of time, which is another benefit of this type. Other advantages of this type of battery are that they are often lightweight, non-hazardous, don’t tend to heat up when in use and can handle cold temperatures well. You also won’t need to worry about maintenance as much as you would need to if you to use flood lead batteries. However, all these benefits hike the price point up quite a bit.

Lithium-Ion Batteries

Lithium-Ion batteries are also considered to be up there with the best solar batteries on the market. They perform well and consistently, the capacity and lifespan are both often high, and they’re often able to be lightweight and small in size. They’re also both safe and reliable while allowing you to install them and leave them almost completely alone thanks to their little maintenance needed designs. In fact, they often don’t need to be touched for at least 15 years after you first install them. 

The only real drawback for lithium-ion batteries is that they are more expensive than other types of batteries. Having said this, lithium-ion batteries are considered the best type on the market due to all the benefits we just looked at, which makes the higher price tag understandable. 

Other Considerations

Now we’ve looked at all the different types of solar batteries you could choose from, let’s look at a few other considerations that are worth thinking about before you go out and buy the first battery you see. Keep these factors in mind when shopping for a battery to make sure you get the best model possible for you. 

Budget

It goes without saying that your budget is an important factor to consider when choosing your solar battery. You can see a pattern on the solar battery market in which the more expensive models are considered better performing and tend to have longer lifetimes, however it is still possible to find an impressive solar battery for a smaller budget. 

For instance, you may find that a lithium-ion battery costs much more than a lead flood acid battery, however the latter also is more durable, takes up less of your time on maintenance and is easier to install and use. This shows that it is also important to consider other factors as well as your budget, as you may be able to find your optimal battery for much less than your maximum budget. 

Charging Time

The charging time of your battery will depend on your individual needs and preferences, so you’ll need to figure out whether you need a fast charging battery or can live with a lower alternative. Of course, we’d all prefer a faster charging time for our solar batteries, but this may compromise the other benefits that you may need with your battery, so if it’s not necessary you may want to consider a slower charging model. 

The fastest solar battery to choose is probably a gel battery as they can be charged very quickly, as well as a lithium-ion model. The latter only takes around three hours to fully charge, which is considerably less than other alternatives such as flood lead acid batteries, which can take a whole day's worth of sun to charge fully. Choosing a faster charging battery will allow you to use your solar power much quicker than slower charging batteries, however don’t compromise all the additional features just for this one if you can help it. 

Battery Capacity

This is perhaps one of the most important factors to consider when purchasing a solar battery, as you don’t want to choose one that isn’t going to last for the whole time of whatever you’re using it for. Stopping to recharge your battery and having to wait for it to recharge may prove to be very frustrating, so it’s important to choose a battery which is large enough for your needs (while we’re not talking about physical size here, that is another consideration for you to think about if you’re wanting a portable battery). 

Battery capacity is usually measured in Amp-Hours (Ah), which shows how much energy the particular battery can hold under specific conditions. For example, if you’re needing a battery which can provide 18 amperes in one hour at 12V,  you’re going to need at least a 12 volt 18 Ah battery for it to be the best option for you. 

Bear in mind that stackable batteries can all be used at once, so you can get away with using lower capacity batteries if you have more than one of them. You’ll be able to run your whole home using a model with a low capacity and a high power rating, however it will only be able to do so for a couple of hours. On the other hand, choosing a model with a high capacity and low power rating will only be able to power a few appliances for a longer period of time. 

If you can, choose a solar battery with both a high capacity and a high power rating. However if you cannot find one of these within your budget, decide whether you can live with a lower power rating or lower capacity easier.  

Manufacturer’s Warranty

While you don’t want to buy a solar battery thinking about it faltering or having to send it back, it is always worth checking whether the model you’ve chosen comes with a good warranty or not. This will protect you from losing a substantial amount of money if your model breaks down, as some models do not come with a manufacturer warranty. 

Manufacturers who offer a good warranty are considered more reputable as it shows that they trust their product enough not to break down and cost them money. This makes a warranty very telling whether the battery is well made and has a long lifespan or not. 

The quality of the warranty will depend on how much the battery cost as well as how well known the manufacturers are. Of course, it all depends on how much you’ve spent on your solar battery but we’d consider anything higher than a 20 year warranty a good one. A lifetime warranty is always most desirable, but you’ll normally only find these along with the hefty price tag. 

Battery Lifespan

Along with the warranty, you’re going to want your battery to last a long time. We all know that batteries deteriorate over time - just take your phone battery for an example. Phones go from being able to last days at a time without charging to having to be charged every couple of hours, and solar batteries are no different. Each battery on the market has a set number of years, days and hours to be used up before its charge cannot be held well anymore, so it’s important to find one which has a higher lifespan before the inevitable happens. 

Unfortunately, manufacturers often do not disclose how long the battery’s lifespan is, making it harder for the consumer to determine which is going to be the longest lasting model. You’re going to have to make an informed decision by comparing the battery’s size, type and brand name. A higher cost will often indicate a longer lifespan as well, and of course the product ratings are a good place to find out how long your battery will last for. 

Easy Installation

Last but not least, you’re most likely going to want your battery to be easy to install into your RV or campervan. Although you can definitely work around a difficult to install solar battery, ease of installation is very much desired when you have little to no experience with a solar panel system. If this seems like too much of a hassle for you, you can also get help from a professional. 

However, if you’re dead-set on installing your battery yourself, you’re going to want it to be relatively lightweight so you can pick it up easily without it crashing down on the floor and risking breakage. You’ll also want a solar battery that is going to fit in the space you have allotted for the battery, so pay attention to specifications. Moreover, if the battery compartment in your space is closed and hard to reach, you may want to choose a battery that is maintenance free so you’re not struggling to reach it every year or so. 

The easiest type of battery to install is the lithium-ion battery, thanks to its small size and weight and the fact that it doesn’t need to be maintained for the first 15 years of its life. However, if your budget doesn’t cover the high price of lithium-ion batteries, you can still find other types which are also relatively easy to install. 

Which is the Best Deep Cycle Battery For You?

So, there we have it - our list of our top five batteries for solar systems as well as the most important factors to take into account when choosing the right battery for you. That’s all we can really do for you unfortunately - only you can decide which type of battery will work the best for your individual needs and situation, whether it’s lithium-ion, gel, flood lead acid or AGM. 

Before you choose a battery to purchase, remember the factors we discussed during our buyers guide above. Considering these before committing to one battery will prevent you choosing one that isn’t going to aid your life as much as another could and will make a big difference to your solar power system experience. 

As we mentioned before, our favorite has to be the ExpertPower 12V 33Ah Rechargeable Deep Cycle Battery. It is not too expensive, yet it is reliable, easy to install and maintain and performs to a high standard. However, if you’re more interested in a solar battery which has a smaller cost rather than the overall performance, the ​Mighty Max Deep Cycle Rechargeable Battery may suit your needs the best. 

It is important to keep your budget in the forefront of your mind when choosing your new solar battery, as there are many good performing models available that can satisfy your needs without going above your budget. One more piece of advice from us is to keep yourself safe and don’t hesitate to ask a professional if you’re unsure of what you’re doing before potentially ruining your battery and wasting your money. 

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