The EG4 PowerPro WallMount Battery is a sleek, compact, and unbelievably heavy unit that was designed to revolutionize the way we think about outdoor power storage.
Since its release, we think this battery has actually solved quite a few problems that EG4 didn’t even realize when they designed it. With that said, it’s not perfect. For starters, it’s heavy and it’s pricey, so we’re here to help you decide if it’s actually worth the investment.
After a few months of real-world testing, we feel it’s time to share our thoughts about its performance, strong points, drawbacks, and overall value. We’ll also dive into its features and specs, and, if you think it’s the right fit for your needs, we’ll even share a few discount codes we were able to track down so you can save some money.
Right off the bat, this battery is not for the faint of heart. At 308 lbs, it’s a ridiculously heavy beast. In fact, it’s one of the first products we’ve looked at that failed the Tiny Baby Lift Test.
As if that wasn’t enough, attempting a solo lift actually landed Tiny Baby on the injury reserve list (he hurt his back trying). But, with the efforts of two people and a lot of patience, we were finally able to get it off the ground and mounted.
As mentioned, we’ve now had the EG4 PowerPro Battery in The Solar Lab for months, using it extensively for a variety of purposes. It’s currently installed in the garage, and we use it to cycle power to our mini split system, which helps power an enormous heater that keeps the garage warm during the winter.
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Before we dive into the results of our real-world performance testing, let’s take a rapid-fire look at the specs this big boy is packing:
Even with our discount code through Signature Solar, it comes in at $3,549, so it’s definitely not the most budget-friendly solar battery out there. With that said, it is a really high-quality unit with a lot of really useful features, so it’s not as if your money goes nowhere.
Plus, if you actually take the time to break down the cost per kilowatt-hour, you’ll find it comes out at about $248 per kWh, which is actually less than the cost per kWh for the much cheaper and hugely popular EG4 LL Server Rack Battery.
Now that we’ve gone over the basic specs, let’s discuss some of the things we picked up on after using the PowerPro regularly over the course of a few months.
The outdoor-rated version of the PowerPro comes equipped with legit weatherproofing, including rubber feet and a wall-mounting option to keep it stable and off the ground.
The IP65 rating ensures it’s dust-tight and water-resistant, making it ideal for harsh environments. While it was too big for us to test it out in the deep freezer, the self-heating feature works incredibly well in our garage, which gets ice-cold, especially right now during the winter months.
Even when we’re gone for the weekend and completely shut off the garage heating, the PowerPro is toasty and ready to rip when we return on Monday. Keep in mind that there’s snow on the ground here and the temperature has been below freezing for weeks on end, so it’s fair to say that the self-heating mode works.
While there’s no getting around the fact that the weight is an issue, the actual set up process for this battery is a breeze. With just one ID switch, a single protocol button, and a communication cable, you’re ready to go. Compared to server rack batteries that need to be wired together and installed in a rack, this streamlined process is a massive time-saver.
The display screen is also fairly decent and really user-friendly, enabling you to monitor and control the battery using just a few well-marked buttons and prompts.
Another important note about mounting and installing the unit is the fact that you don’t have to mount it off the ground. We wanted ours elevated to give it a cleaner look, but you could also line the battery on the ground, then use the mounting brackets just to anchor it to the wall, preventing it from accidentally tipping over. Having it along a wall and sitting on the ground would simplify everything about installation.
All key components and terminals are conveniently located and easily accessible. On the battery’s left panel, you have your negative battery connections, state-of-charge lights, the display screen, ID switches, and a power button for the BMS.
On the right side, you have your breaker switch, watertight communication ports, and positive battery connections. It’s just all really well laid out and easy to use. Even the terminals feature quick-disconnect options, simplifying installation and maintenance.
For outdoor use, EG4 recommends pairing it with their conduit box, so it can work alongside something like the EG4 18kPV Inverter as part of a fully sealed, waterproof setup.
While we have the outdoor version of the PowerPro, EG4 does offer a cheaper indoor version of the battery that doesn’t have the self-heating feature or the same level of weatherproofing. For those planning on going with a full indoor setup, this is a great way to save some money on the upfront costs.
We have mentioned in the past that it’s pretty evident EG4 actually listens to their customers and makes products that will help them, so the availability of a more budget-friendly version of the PowerPro just speaks to those efforts.
You save about 200 bucks going with the indoor version, so it’s a decent chunk of change, especially if you plan on picking up more than one of these things.
Another standout feature is the completely complementary EMP (Electromagnetic Pulse) hardening. We say complementary because this added protection is included at no additional cost—you get it automatically with both the indoor and outdoor versions of the battery.
Given that many other brands charge extra for this level of protection, it’s really impressive that EG4 offers EMP hardened products for free.
Whenever you test any battery, you want to make sure that it can live up to its rated discharge rate. The PowerPro is rated to run at 200 amps continuously, so it’s supposed to run at about 10,000 watts. It also says it can do 10,500 watts for 10 seconds and 15,000 watts for up to 3 seconds. We wanted to test this out, so we ran a 220-amp load, which lasted about 10 seconds—exactly as EG4 advertised.
As mentioned earlier, we also used it to start up a massive 15,000W heater we use in the garage. Despite its huge power requirements, the PowerPro was able to start the heater and run it for a full 10 seconds, which is actually longer than advertised.
In terms of just general day-to-day use here at The Lab, we have paired the PowerPro with various inverters, including the EG4 18kPV. All we can say is that it has performed really well across all of this real-world testing, providing reliable power to our appliances and power tools.
As we already touched on, the self-heating feature has been particularly useful during these past few winter months, guaranteeing uninterrupted performance, even when it’s freezing cold in the garage. We’ve even joked that the PowerPro is the hardest working employee at The Solar Lab, as it’s busting its butt working to stay warm every day of the week, including over the weekends.
While we have ours in the garage, we’ve actually thought of plenty of use cases for a battery like this. One that immediately springs to mind is the off-grid setup at Josh’s cabin, where a single PowerPro Battery would outperform the EcoFlow DELTA Pros he uses for power storage.
While it would have been great for Josh’s setup, we just think the compact, weatherproof design would make it a better fit than bulky server rack batteries for pretty much any application where space is at a premium. Basically, it stores an incredible amount of power, but takes up very little space, especially if you manage to dig into your inner HULK and get it mounted off the ground.
Finally, when we got into testing the battery’s efficiency, we found that the PowerPro was 100% efficient. While we expected it to perform well in this regard, it completed our efficiency test flawlessly.
Overall, it just works exactly as it should, which is always a good sign when you’re testing any piece of solar equipment.
Here are just some of the things that impressed us about the PowerPro:
The simplified setup with minimal configuration required was a huge selling point for this unit. Sure, the weight is an issue when you’re mounting it, but the actual hands-on practicalities of the setup process are incredibly simplified.
We really like that it’s available in both indoor and outdoor versions, so it can suit different needs. It also pairs really well with a ton of different inverters, and just seems more practical for most setups than a series of server rack batteries.
The self-heating mode on the outdoor version also makes it the type of thing you can use year-round, no matter what type of climate you live in. Whether you just need one or two high-capacity batteries for an off-grid cabin, or you’re investing numerous batteries for a whole-home setup, the PowerPro would be a practical choice.
It’s weatherproofed, durable, and thoughtfully designed—there’s not much else to say. Even after a few months of using it on a near daily basis, we haven’t found any significant flaws in the design or the build quality.
The only issue we found, and it is a minor gripe, would be the fact that the handles are pretty much useless. They just aren’t positioned correctly for lifting such a heavy unit, making it more likely that you’ll hurt your hands using them. To say that small issue is the only design flaw we found kind of tells the story about the unit’s overall quality.
Again, the fact EG4 decided to include this protection by default is huge. Not only does it save you some cash, a lot of people would skip this if it was a paid upgrade, so everyone’s getting the same level of protection, regardless of their budget.
Signature Solar carries all of EG4’s products, so you can get exceptional service if you pick your PowerPro up through them. The 10-year warranty that EG4 backs this thing with is another testament to its quality.
Sure, there are battery options out there that are cheaper, like the RUiXU Server Rack Batteries, but when you buy from relatively unknown companies like this, you get literally zero customer support. From our perspective, the peace of mind you get knowing you’ve bought from a company with solid customer support is incredibly valuable.
The PowerPro can also be used for large-scale setups and battery banks, as it supports parallel pairing with up to 64 units. If you went that far, you’re talking about a battery bank with a combined storage capacity of 915.2kWh—insane!
For most people, the option to add one or two more of these units down the line will be the real attraction, as it allows your system to grow with you.
While the PowerPro excels in many areas, there’s one notable drawback: its continuous output rating. Despite its 14.3kWh capacity, the battery is limited to a 10,000-watt continuous output. Sure, it can sustain short bursts above 10kWh, but this limitation may confuse some users, as it’s less common in server rack batteries with similar capacities. Clarifying this point upfront could help manage expectations.
The other thing would be the price, which is pretty steep. However, as we’ve explained, you do get a lot for your money. For those on a tight budget, it won’t be a practical option, but if you have the money to spare, it’s a really impressive battery that should stand the test of time.
The EG4 PowerPro WallMount Battery is a versatile, durable, and user-friendly power storage solution. Its robust design, excellent performance, and thoughtful features make it a standout choice for both indoor and outdoor applications. While its continuous output limitation may be a drawback for some, the overall value and reliability it offers outweigh this minor shortcoming.
For $3,549 (with our discount code), it’s a solid investment for anyone looking to upgrade their power storage setup. Whether you’re backing up your home, powering an off-grid cabin, or supporting a large-scale off-grid system, the PowerPro delivers on its promises.
Overall, it definitely gets two thumbs up from us, and we’ll continue to use it in our garage for the foreseeable future.
Signature Solar: https://signaturesolar.com
Use Code: THESOLARLAB50 for $50 Off
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