Newer and more powerful solar generators and power stations are constantly coming out. This is wonderful news! The industry is catching up to what people want in an emergency backup power option.
The EcoFlow Delta Pro is one of those systems that has brought to the market things that we’ve never had before. 240v capability, auto transfer switch, charging from EV stations super-fast, and much more. We’ll go over all of those things here in this full review of the Delta Pro in a 120v and 240v configuration.
Are you looking to run your well pump, keep all of the food in the fridge and freezer cold, and even run some air conditioning during the extreme heat of the summer? The EcoFlow Delta Pro is fully capable of accomplishing this. But is it the right system for you to go with? Does it perform better than the Bluetti AC300? Will it outpower anything that the Renogy Lycan Power Box 5000 can do? By the end of this review, we’ll know for sure.
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The Delta Pro launched in early 2022, and when it launched it officially became the most powerful system on the market in terms of how much power it can continuously output. Using a pure sine wave inverter and a full 120v and 30a of power output, the Delta Pro can push out 3,600w non-stop for as long as the batteries and solar can last.
It is full of all the necessary outlets to run without any issues. With 4 house-style outlets (Nema 5-15R) to run appliances like fridges, freezers, lights, fans, chargers, microwaves, toasters, coffee makers, TVs, Wi-Fi, security systems, and much more. It is easy to run a power strip off of those 4 outlets as well if there are a lot of things you need to run. Each outlet is rated to push out up to 20a but cannot do more than 30a total from all of the outlets combined which is normal. 20a out of a single outlet is impressive and is the highest rated output for any Heavycap or Ultracap solar generator on the market.
It has a 30a RV plug (TT-30R) that is rated to a true 30a output. The Titan, MPS3K, and AC300 all have the same plug but are only rated to 25a output. Do you need 30a of real output? Probably not, but if you need it, it’s good to have it. Having run my Titan solar generator in my RV for over 2 years now I’ve never had a problem with having a 3,000w inverter.
Some would say that the 3,600w inverter is overkill and not necessary since most people have been very happy with 3,000w of output from other solar generators. But if you can have more power potential, why not have it?
It has four USB-A charging ports and two 100w USB-C ports for extra fast power to compatible devices. The DC outlets are pretty standard with one 12v/10a DC cigarette lighter style port and two 12v/3a 5521 ports. But there is now a 12v/30a Anderson Powerpole port which will be very good for people who need a lot of DC power for running things like HAM radios.
The inverter will peak at 7,200w which makes it capable of running heavier equipment like air compressors, chop saws, and water pumps that have a really high starting wattage. Keep in mind that as a single Delta Pro unit, it cannot run a 240v well pump or any other 240v appliance. For that, two Delta Pros and a 240v Connection Hub are required.
It is possible to connect a single Delta Pro to an electrical panel but it will only supply power to one side of the electrical panel and only 120v power. Do not turn on any of the 240v breakers when only one Delta Pro is connected or it could cause damage to the device that uses 240v power and possibly the Delta Pro as well. I found for my electrical panel when I connect just one Delta Pro to my transfer switch that the right side of my panel has power and my left side does not.
My transfer switch is an SS2-50R connection, the connection types vary so be sure to identify which plug your transfer switch is.
This is hands down the best feature about the EcoFlow Delta Pro is that you can link two units together with the 240v Connection Hub and supply 240v power. Using the connection hub there is the option to use the L14-30R port and power something directly such as an electric dryer. Or it’s possible to take that and run it to a transfer switch and power an entire electrical panel up to 30a output at 240v.
When two Delta Pros are connected together, they can supply up to 7,200w of output power constantly through the large 4-prong plug on the 240v connection hub.
I personally chose to use my home transfer switch and use the proper cables to get my two Delta Pros connected to my household electrical panel. Keep in mind that it’s not possible to run any 240v equipment above 30a. Volts x Amps = Watts. 240v x 30a = 7,200w. Or it’s capable of still pushing out 120v and 30a from each unit which would total 120v and 60a for the 7,200w output.
I find it easiest to use the transfer switch, so I do not have to run extension cords anywhere around the house. This is how I run my well pump and have water throughout my entire house just like normal.
The way it works is that within an electrical panel there are two sides of breakers. Each side carries 120v of power. Where there are 240v breakers you’ll typically see two of the breakers joined together to make the 240v power. That’s because one breaker is touching the left side of the electrical panel and the second breaker is touching the right side of the electrical panel, therefore making 240v power.
By running 240v power to the electrical panel I am able to run everything in my house without any issues including my electric dryer. But since I have a propane dryer and an electric dryer, I don’t use the electric dryer when using the Delta Pros because it consumes 5,800w to run! That’s a ton of power. The best option is to use a clothesline.
I do not have central air conditioning and have found that most central air conditioners use at least 50a to run which means even a double Delta Pro setup in 240v will still not run central air conditioners. Window and portable air conditioners are definitely possible with either just one or two Delta Pros.
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One thing that nearly no one considers with solar generators is the “idle power consumption rate.” This is how much power is being used just to have the inverter (AC power) turned on while not running any equipment. The Delta Pro will automatically turn off after 12 hours of no AC power being drawn unless you change that setting within the app.
This is a big deal because if the unit is turned on but not running anything, it will steadily drain the battery. The EcoFlow Delta Pro has a phenomenally low idle power consumption rate of just 14w. This is similar to the Titan solar generator which varies but is around the same. For the Delta Pro, if it were turned on for 24 hours and not running anything, it would consume 336wh which is about 9% of the internal battery capacity.
But the big reason the Delta Pro is the preferred unit between it and the Bluetti AC300 is that the AC300 has an idle power consumption rate of 63 watts! The AC300’s battery, the B300, has a capacity of 3,072wh. And if put through the same condition of being left on for 24 hours while not running any equipment, it would consume 1,512wh total. That is 49% of the battery! The Delta Pro’s inverter is much more efficient and uses 5x less power than the Bluetti AC300. That is why it is the preferred choice between those two units.
Batteries and Expansion
The Delta Pro has a built-in battery of capacity of 3,600wh using LifePo4 cells. Using LiFePo4 cells greatly increases the weight of a Delta Pro to 100lbs. but it gives the solar generator a lot more life cycles. By using LiFePo4 instead of lighter Lithium NMC the Delta Pro will have at least 3,500 cycles before it reaches 80% efficiency. That’s basically 10 years of non-stop use before the battery reaches the 80% efficiency level.
The Delta Pro is capable of adding up to two Delta Pro Expansion Batteries. Each expansion battery also is 3,600wh of capacity. This gives a single Delta Pro with two batteries a grand total of 10,800wh of battery capacity! That is a lot of battery for anyone. To compare to the Titan solar generator, it would take 5 Titan expansion batteries to have a similar battery capacity.
When you have two Delta Pros you can have two batteries on each unit which means the grand total battery capacity maxes out at 21,600wh. For most people just running household essentials during power outages and emergencies will supply 3+ days of non-stop power just from the batteries without solar panels connected. If more equipment is run, then obviously that time goes down.
Each expansion battery uses the same LiFePo4 battery and connects directly to the back of the Delta Pro solar generator.
One of the greatest benefits of using the EcoFlow Delta Pro expansion batteries is that they do not need to be balanced or be at the same voltage as the main battery when connecting them together. Regardless of the state of charge of the main unit and external batteries, you simply connect them together, and the unit will auto-balance the entire system.
When there are two Delta Pros together for 240v power, the two Delta Pros will work independently of each other. If one has more battery than the other, it will not charge the one with less battery percentage.
The EcoFlow Delta Pro can charge in multiple ways including wall charging, solar, car, and even electric vehicle charging stations.
When using the wall charger there is a switch on the back of the Delta Pro that allows you to select between slow charging and fast charging. The slow charger will charge the Delta Pro and any attached batteries at a rate of 400w total. When using the fast mode, it will charge up to 1,800w total. Some people prefer to slow charge because it is easier on the batteries and can help increase the life cycles. I personally prefer the fast mode.
If you want to go really fast, then use a 240v EV charger. On the front right side of the Delta Pro, there is a charging port called the Infinity port. You need the special EV Charging Adapter, but it will allow you to take the Delta Pro to an EV charging station and charge at a rate of 3,400w. This is called “level 2” charging and can be done at home with your own EV charger or at an EV charging station.
This makes it a very viable option to use the Delta Pro within a Van or an RV because it can be changed so quickly while on the road if the weather is bad or there are not enough solar panels to fully recharge the system each day.
When it comes to charging from solar, this is likely the weakest part of the Delta Pro. It has an MPPT charge controller that is very high quality and capable of inputting up to 1,600w of solar into the battery. But the charge parameter that is built into the MPPT charge controller is what makes it hard to reach having 1,600w of solar panels connected.
The charge parameter is 11-150v and 15a. It’s okay to have more than 15amps in solar panels connected but you never want to exceed 150v. In fact, it’s best to not exceed 130v it at all possible. If you exceed the recommended voltage, you will burn out the charge controller and have to send the unit it, and have a new one installed, and that’s not covered under the warranty.
The reason this is the weakest point of the Delta Pro is it’s hard to attach 1,600w of panels and stay within the charge parameter. For example, the EcoFlow 400w folding solar panel should be a perfect fit because if you have four of those solar panels there’ll be 1,600w in solar connected. When connecting solar panels, the most important specs to pay attention to on the sticker is the VOC (open circuit voltage) and the ISC (short circuit current). The VOC is the most voltage the panel can make, and ISC is the most amperage the panel can make.
When solar panels are connected in series, the total voltage goes up with each panel connected, but the total amperage stays the same. On the EcoFlow 400w folding solar panel the VOC is 48v, and the ISC is 11a. If four of those panels are connected in series, the total voltage connected would be 192v which would absolutely burn out the charge controller and ruin it. At most, only 3 of those can be connected and they would be at a total of 144v which is still above the recommended 130v.
That means to use those solar panels the only option is to have two groups of two for a series/parallel combo. The total voltage with four of those solar panels would be 96v and the total amps would be 22a. But since the charge controller can’t use amps higher than 15a, each solar panel cannot produce a full 400w of power, which means it can’t push in 1,600w into the Delta Pro.
With the high-quality Rigid 100 solar panels, their VOC is 21.59v and the ISC is 5.48a, it’s possible to get 1,800w of solar panels connected. There would be three groups with six solar panels in each group. This would be a series/parallel combo connection but does give the ability to over-panel just a little bit. But it’s barely reaching the full 1,600w rated capacity.
The Rigid 200 solar panels have performed the best in all of my testing, and we have successfully connected up to 2,400w of solar panels to each Delta Pro so they are over-paneled as much as possible. This makes it possible to get more than the average 5 solar peak hours in a day.
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How does the Delta Pro compare to other units like the Bluetti AC300, and Renogy Lycan Power Box 5000?
Well the AC300 we know is inferior to the Delta Pro simply for the fact that the AC300 will burn battery power just by being turned on. The AC300 can do 240v power as well and can add a little more battery capacity and even more solar capacity, but that is basically negated by the fact that the energy is just burned off due to the unit being on. It really is a big killer for the AC300 that it uses so much power just to be turned on. It’s almost not worth getting the AC300 unless the extra batteries and solar are added just to help offset that idle power consumption.
The Renogy Lycan Power Box 5000 is a similar system with a 3,500w inverter, 4,800wh battery, and a massive 4,400w of solar input capacity. But it cannot do 240v power. And after reviewing the Renogy Lycan Power Box 5000 it appears to be impossible to get more than about 2,000w of solar to really go into the power station. So there seems to be some misinformation being reviewed and spread with the Lycan. Not to mention that the Lycan weighs 264lbs before adding extra batteries. So in my opinion, I feel the Delta Pro has many factors that are better than the Renogy Lycan.
The Titan solar generator is a very similar system with a 3,000w inverter, 2,000wh batteries that can be expanded to any capacity, and 2,000w of solar input. If a single Titan and a single Delta Pro were compared side by side, they’re pretty similar. A Titan would need one extra battery to be close to the same amount of battery capacity as a single Delta Pro. I’d say the biggest advantage the Delta Pro has over the Titan is its ability to expand more than the Titan. The Titan cannot make 240v power and when two Delta Pros are put together, they can easily have over 3,600w of solar connected which beats the Titan’s 2,000w of solar input capacity. The other huge advantage is that the Titan is perpetually in a backorder of about 8 weeks on average whereas the Delta Pro is usually in stock and ready to ship.
Pros and X-Factors
What sets the Delta Pro apart from the other solar generators on the market is its ability to make 240v power and connect to a house through a transfer switch. It’s also possible to use the EcoFlow Home Smart Panel which is like a transfer switch but will automatically transfer power from the Delta Pros to the house when the power goes out.
The Delta Pro is one of the fastest charging power stations from a wall charger, and also from an EV charger. The batteries will hold a charge for up to a year.
The EcoFlow App is a wonderful bonus to use with the Delta Pro. Once the Delta Pro is powered on, it’s recommended to connect it to the local Wi-Fi and then update the firmware to make sure it performs at its best. But in addition to that, once it’s connected to Wi-Fi it can be monitored from your phone regardless of where you are. You do not have to be at home or close to the unit to monitor if it’s connected to Wi-Fi. Within the app, you can also see how much power is coming in from the solar panels, how much power is going out, turn on and off outlets, change charge settings, and much more. The app is very easy to use and a huge bonus for Delta Pro and all the EcoFlow solar generators.
The ability to add batteries is a big bonus since it’s a very large battery capacity when maxed out.
There’s a 2-year manufacturer warranty to make sure you’re covered if anything stops working randomly. As long as the firmware is updated, there shouldn’t be any issues.
Cons & Issues
Many people have an interest in keeping this in the back of their EV (electric vehicle) in order to recharge their EV battery to get a little further. The Delta Pro cannot recharge an EV. There is technically a way to do it, but it is not recommended, and it will void the warranty on the Delta Pro. Some people don’t need EV charging so it may not be an issue for you.
Customer service has been mentioned many times on forums and groups stating that it’s lacking in help. Many people have called in for what they felt was a simple issue that should have a simple solution and no solution could be found with help from customer service. That and it doesn’t appear that their customer service team is located in the USA which gives a lack of faith to many people. For example, the customer service team insists that it’s impossible to run 240v power to a house using a standard transfer switch. They insist the EcoFlow Smart Home Panel is required, but many others and I have powered our houses without the Smart Home Panel. Whether this is a push to sell those units or not is debatable.
The expansion batteries must be EcoFlow’s expansion batteries. You cannot use other branded batteries. This isn’t a huge deal breaker because they have many great features like auto-balancing but it would be nice to have the ability to use other batteries. The Titan solar generator is the only unit capable of using other brands of batteries with the Titan.
It’s heavy, each Delta Pro is 100lbs. and each battery is 84lbs. But they do have built-in telescoping handles and wheels which do make a big difference on flat surfaces.
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There are many pros and cons to the EcoFlow Delta Pro system that I have covered in this full review. Personally, I really love this system. Is it the “end-all-be-all” of all solar generators? Probably not. But the ability to have 240v power and run my house comfortably for many days on end is something that’s hard to put a price on. I have personally run my house for four days straight with just 2,520w of solar panels connected which wasn’t even the max solar I could connect.
Anyone looking to make themselves and their families very comfortable during power outages should seriously look at the EcoFlow Delta Pro. And if you’re truly interested in it, you should order it sooner than later because we never know what new supply chain issues may arise.
I love mine and am 100% sure you will love yours too.