Disclaimer: This product was sent to us for free, in exchange for a review. All opinions expressed in this post are based on our personal views and experiences.
EcoFlow Goes All In With Its Latest Delta Max & Pro Power Stations
EcoFlow recently released its latest Delta power stations, also known as solar generators.
The Delta Max and Pro are some of the largest power stations on the market in terms of battery capacity, and EcoFlow advertise these as the ultimate battery backups for power outages and emergencies.
Since we’re RV travelers, we use our power stations to power our whole RV and electronics on the go, no matter where we are. All it takes is this 15A to 30A adapter.
Paired with a couple of solar panels, it fills all of our electricity needs.
EcoFlow has let us test the Delta Max for a couple of weeks now, and it’s time to review it.
The smaller one has a weaker inverter (2000 vs 2400), but other than that they are very similar.
Without further ado, let’s get to our review of the Delta Max.
EcoFlow Delta Max 2000 – Specifications & Features
The Delta Max we got, the 2000, stores 2016 watt-hours.
With that much electricity, you can power a 1500W microwave for 1.5 hours, or an air conditioner for 1-2 hours depending on the size.
Plug in a 1800W space heater and it will run for about 0.8 hours.
But these are obviously not meant to be used to heat up or cool down your house or camper, unless you absolutely need to.
It will last for days if all you need to do is run a coffee maker and toaster in the morning, then be on your computer all day while charging your portable devices.
It’s easy to find out how long a specific device will last when plugged in to the Delta Max.
If you know how much electricity your device require, you can divide the total watt hours by the required wattage, then multiply by the inverter efficiency.
For example, my MacBook Pro has a 100W charger. So the math would be: 2016Wh/100W*0.85=17.1 hours.
Since my Macbook lasts a full work day on a full battery and only takes two hours to charge up, the Delta Max would last a full week.
I have seen power stations with 20A outlets before, but none of them have been able to actually output 20A.
The Delta Max can do up to 2400W, which is exactly 20A.
That means that it can power not only microwaves and residential refrigerators, but washing machines and ovens as well.
The pure sine wave inverter powers the six AC outlets, and remember that it can output up to 2400W in total, not to each port at the same time.
There is also a mode called X-boost that increases the output wattage to 3400W.
EcoFlow does not guarantee that this works with every appliance or device that requires a high wattage above 2400W.
It has become clear to me that EcoFlow likes to push the envelope when it comes to how many ports you can put on a power station.
The Delta Max has almost twice as many ports as some of its biggest competitors.
Six 20A AC outlets, six USB ports, three DC ports, and two battery chaining ports.
Four of those USB ports are USB A, and two are USB C.
The USB C ports can both output up to 100W, which is powerful enough to charge the latest laptops, tablets, phones, and consoles that support USB C charging.
A regulated 12V cigarette port makes it easy and safe to plug in a 12V fridge, and we didn’t have any issues powering our BougeRV CR45 fridge/freezer.
There are also two 5.5mm DC outputs that can be used to power small electronics with that type of input. EcoFlow includes a DC cable for this purpose.
On the side, you’ll find two battery ports where you can connect two EcoFlow smart batteries (click to view on Amazon).
If you add one battery, you’ll have a total of 4032Wh. If you add two, a total of 6048Wh.
The smart batteries are also capable of fast charging.
The backlit display tells the input/output watts, battery percentage, hours to empty/full, active ports, and WiFi status.
For better monitoring I recommend using the EcoFlow app.
The Delta Max has built-in WiFi, just like the Delta Mini.
This lets the Delta connect to an existing WiFi network and be monitored and controlled remotely.
In the app, you can not only monitor input/output watts, active ports, battery percentage and temperature, but also change several settings.
The Delta Max 2000 can recharge in 1.8 hours, and do 0-85% in just 65 minutes. That is extremely fast for a power station and I haven’t seen any other brand come close to that.
But of course you can also charge via solar or the included car charger.
When it comes to solar, it has an MPPT solar charge controller that will charge the battery efficiently when using solar panels.
The solar charge controller can handle voltages between 11-100V, up to 10A, and 800W max.
Therefore, if your panel(s) are going to output more than 10A they should be wired in series and not parallel.
As long as you make sure the total voltage of your panels aren’t going to exceed 100V, you’re safe. That means you can use not only 12V panels, but 24V as well.
There are no solar panels included, but EcoFlow sells a kit that include four panels and the Delta Max 2000.
If you’d like to connect third-party panels with MC4 connectors, you can, and it’s very easy to do since EcoFlow includes an MC4 to XT60 adapter.
Note that a lot of popular foldable and portable panels do not come with XT60 connectors, but some of them use MC4 connectors.
If you’re considering purchasing a specific panel or two and want to make sure it’s compatible, please leave a comment.
One new thing EcoFlow has added to the Delta Max is the possibility to add more batteries.
It now sells the EcoFlow smart batteries (click to view on Amazon), which are easily connected to the Delta Max. Connect one to double the battery capacity, or two to triple it.
These smart batteries charge just as fast as the built-in battery.
In The Box
EcoFlow includes a wall charger, car charger, DC5521 to 5525 cable, and an MC4 to XT60 adapter.
My Review Of The EcoFlow Delta Max 2000
What I Like
Lots of battery capacity & possibility to add more
As somebody that has been traveling full-time in an RV for over two years and spent a lot of time boondocking without hookups, I know that my wife and I use a lot electricity.
The 2016Wh found in the Delta Max are enough to last us 2-4 days depending on how much time we spend on our computers and how many kitchen appliances we use.
My estimate includes the use of a coffee maker, toaster, air fryer, and TV.
You could buy several small power stations instead of one heavy one, but I like that this has everything we need.
I also like that you can add more batteries. We don’t feel the need for it right now, but we might do it in the future. Especially if we live in a house and have a Delta for backup power.
Very powerful inverter
We have never reviewed a power station that can output 20A, so I have to mention how great it has been.
Whenever we use the RV microwave with our other batteries, we have turn off everything else that uses around 200-400W for it to not overload. With this 2400W inverter, we haven’t had any issues powering the microwave and other things at the same time.
Most of our power stations can’t even run the RV microwave in the first place.
We haven’t used the X-boost mode much, since we don’t have anything that requires that much power except the RV AC.
Extremely fast charging
The fact that it can be fully recharged in less than two hours is incredible, and especially great for us.
We usually have enough sunny days for our solar panels to keep the Delta Max charged up, but when we don’t we only need to turn on the onboard RV generator for an hour or two to top it off.
That simply hasn’t been possible before, well at least not until we got the EcoFlow Delta Mini last year.
One thing I do want to mention though, is that sometimes the battery thinks it’s at 100% and fully charged, but then when we start using it, it drains quicker than usual and I suspect that the BMS thinks it’s fully charged and stops it from continuing even though it isn’t.
It seems like a software issue, and it doesn’t happen all the time, but I will keep you posted here and let you know if I find a solution.
We have gotten used to monitoring the Delta Mini with our phones, so it’s great that the Max has the same features and can be monitored with the same app.
Having WiFi on does seem to drain the battery, but it’s just a matter of a couple of percentages everyday.
That is something you should be aware of though, since some might leave the battery in a closet and have a dead battery when they go get it during a power outage.
Our solution has been to turn off the power station completely while we don’t need to use it, like when we’re at an RV park or gone from the RV for a couple of days.
So if you’re going to use it as a backup, keep it plugged in so it can charge, or make sure it’s completely turned off.
MPPT & solar capabilities
An MPPT solar charge controller is a must in 2022, so I am glad but not surprised that the Delta Max has one.
I haven’t quite made up my mind about the solar. On one hand it’s great that it can handle up to 100V and 800W, but on the other hand the 10A limit bothers me.
Mostly because I hear a lot of disappointment from people that already have a couple of panels that can’t be wired in series, so they’re stuck with the 10A limit and no options except buying more panels.
As I mentioned earlier, as long as you’re aware of it and plan accordingly, it’s not going to be a problem.
If you’re not sure what panels you should get, please leave a comment and tell me what and how you plan on using the Delta Max. I’ll do my best to help you find the right panel(s) for you.
Number of ports & what they can output
I’m of the opinion that you can’t have too many ports on a power station.
Both my wife and I charge our laptops via USB C, and the fact that the Max has two 100W USB C ports is excellent.
On the other side of the unit, there are a whopping six AC outlets. I wish Goal Zero would use one of these for a weekend and realize how convenient it is to not have to spend your trip constantly plugging in and unplugging cables.
Just like the MPPT solar charge controller, I think a regulated 12V port is a must in 2022.
Nothing new here, just a functional port that can power 12V fridge/freezers, CPAP machines, etc.
I’m not going to say it’s a light power station, but it’s not that heavy for what it has inside.
The permanent handles make it easy to carry around, and the slim design further improves the portability.
The included accessories
Last but not least, I have to give EcoFlow praise for including the cables you’re going to need to use it.
Wall charger, car charger, MC4 to XT60 adapter, and a DC cable. It doesn’t have to be more complicated than that, but for some reason most companies can’t even include that.
What I Dislike
There are not a lot of things I dislike about the EcoFlow Delta Max, but there are three things I want to mention.
Uncommon input port
EcoFlow has been using the XT60 for years now, and I do like it since it’s very easy to connect and disconnect.
To make it possible to connect third party panels that use MC4 connectors, EcoFlow includes an MC4 to XT60 adapter, which I will always give them praise for.
However, a lot of the portable solar panels on the market that come with several different DC connectors do usually not include one of these XT60 adapters.
This might as well be a complaint to the companies that sell these solar panels, since the XT60 has been used by EcoFlow for a long time now and has become an established brand on the market.
10A input limit
You should always know what you’re doing when you connect solar panels to a power station – and then this wouldn’t be a problem – but it’s still limiting that the charge controller has a 10A input limit.
If you have several panels that add up to more than 150W, they should be wired in series and not parallel. Just make sure the total voltage is within the 11-100V range.
As long as you’re aware of this before you buy panels, you’re fine, which is why I wanted to mention it again.
No 30A port
While EcoFlow has added a 30A port to the more capable Delta Pro, the Delta Max doesn’t have one.
I understand why since the inverter is rated at 2400W (20A), but with the X-boost it’s supposed to be able to do up to 3400W (28A), which is why a 30A output could’ve been useful.
We like the Delta Max, a lot. It’s the best power stations we have ever tested, and it has everything we need.
There are a couple of small bugs and annoyances though, like how the battery sometimes thinks it’s fully charged when it isn’t, and how the WiFi will drain the battery even if it’s not in use.
It wasn’t enough of a problem to us during our tests to where we had to make a big deal out of it, but I want to be honest.
From here, the only thing we would need is more battery capacity, fortunately EcoFlow sells the solution, the EcoFlow smart batteries which would double or triple the total capacity.
Currently, with the way we are traveling and living now, the 2016Wh is enough though. Especially since we have 200W of solar panels that can recharge the Delta as long as the sun is shining.
So should you buy it? Well, it really depends on what you need. If you just need a portable battery for weekend trip to charge your phone, tablet, and laptop, this might be overkill.
But if you know what you need and are looking at a similar power station by a different brand and wondering if it’s worth it for the extra ports and features, I would say yes. Totally.
Frequently Asked Questions
How do you chain more batteries to a Delta Max?
EcoFlow sells the EcoFlow smart batteries (click to view on Amazon) that can be connected to expand the battery capacity of the Delta Max.
You can add up to two extra batteries, and each will add 2016 watt-hours.
It’s as easy as connecting the included cable, charging it up, and it’s ready to go.
These can be very useful to have during power outages since it doubles, or triples, the amount of electricity you will have stored.
Last but not least, these smart batteries are capable of fast charging so you can recharge them in under two hours.
Can it be used while charging?
Does it include solar panels?
You can buy two EcoFlow panels, wire them in series, then connect them to the Delta with the included MC4 to XT60 adapter.
You can also use rigid third-party solar panels, like these 100W panels by Renogy.
Is it waterproof?
No, do not not put it anywhere it might get wet.
Please leave a comment down below if you have any questions.