Delta 2 Max Portable Power Station
Before we get to one of the solutions, let’s briefly explain the problem. So we have the electricity that depends on the sun and we want to use it. And when do we generate the most electricity? Depending on the orientation and angle, from noon to afternoon. Stupid only if you are part of the majority of the population that is working away from home from morning until late afternoon. Mornings and evenings are when most households use the most electricity, which is exactly the times when not much solar output is generated.
The simplest remedy is to delay the operation of high loads such as dishwashers, washers and dryers. Often these devices have a timer or comparable functions, which e.g. start the wash cycle only at 13:00 o’clock. The generated electricity can then be used 100% by the user and is not given away free to the grid operator. But does one have a full drum of laundry for every day or is it worthwhile to run the dishwasher? Probably not.
And that’s where the second large cardboard box comes into play, first promisingly hiding its contents behind a thick layer of gray Styrofoam.
One layer deeper, it continues in gray, but much more interesting. When taking it out, remember to keep a straight back, the good 23kg weight wants to be lifted safely!
Besides the titanium of a powerbank, there are also three different cables included. From left to right, a DC5521 to DC5525 cable, regular IEC cable and a cigarette lighter to XT60 cable for charging via a car.
On the left side, there is nothing worth mentioning, apart from ventilation slots and the lettering.
Things are much more interesting on the front, where you’ll find a display, the power button and the first row of power ports, all for USB devices. The following options are available here:
|
Connection |
Output |
Maximum |
|
USB-A (gray) |
5 Volt – 2,4 Ampere |
12 watts per port 24 watts total |
|
USB-A (Blue) |
5 volts – 2.4 amps 9 Volt – 2.0 Amps 12 Volt – 1.5 Amps |
18 watts per port 36 watts total |
|
USB-C |
5 volts – 5 amps 9 Volt – 5 Ampere 12 Volt – 5 Amp 15 volts – 5 amps 20 Volt – 5 Ampere |
100 watts per connection 200 watts in total |
A small anticipation for later: The various current outputs can be deactivated in the app, so that the various voltage converters do not have to run permanently. So it’s clever that you still have a power button for the USB ports on the device. How else would you activate them when you want to charge your completely empty phone? Good thinking!
The right side has more ventilation slots as well as two ports that can be used to expand the storage capacity with additional modules. If the 2048 Wh are not enough, you can upgrade up to 6144 Wh with two additional batteries. However, this does not add more ports. If you also use the PowerStream inverter like I did here, one of the two ports is occupied and only one expansion is possible.
The most exciting part is actually the back, where it continues with a multitude of connections. Here, too, the hard facts in a clear table, before we beat around the bush:
|
Connection |
Output |
Maximum |
|
Socket |
230 Volt – 10 Ampere |
2400 watts per connection 2400 watts total |
|
USB-A (Blue) |
5 volts – 2.4 amps 9 Volt – 2,0 Ampere 12 Volt – 1.5 Amps |
18 watts per port 36 watts total |
|
USB-C |
5 volts – 5 amps 9 Volt – 5 Ampere 12 Volt – 5 Amp 15 volts – 5 amps 20 Volt – 5 Ampere |
100 watts per connection 200 watts in total |
By the way, the current at the sockets is output as a pure sine wave. To whom this means as little as it did to me until recently: a pure sine wave corresponds to what also comes out of the socket in the wall and is usually expected from electronic devices. The line on an oscilloscope is indeed wave-shaped. However, there is also a modified sine wave, which has a staircase shape. This can be produced with a less expensive inverter, but is not suitable for all devices. Here EcoFlow has chosen the better option of the pure sine wave, as you would expect for the price.
Behind the labeled flap are the various ways the Delta 2 Max can be charged directly. On the left we have the two separate solar/car inputs in the XT60i standard. With the additional pin in the middle and the corresponding cable, it can be automatically detected whether charging is to be done via car or solar cell.
The connection for charging via a socket is located in the middle; a maximum of 2400 watts is possible here. If you set the slider to the left position, the X-Stream mode is activated and up to 20 amps are possible on the AC side. If the current is above 20 amps for longer, a circuit breaker trips and you can only continue charging after manually resetting it via the button on the right. Much more interesting and presumably better for longevity is the right position of the slider, where a user-defined charging power can be set in the app. A range between 200 and 2400 watts is preset, while 400 watts is set ex-factory.
A large part of the mentioned specifications then here again in the overview, there is more information on the product page at the manufacturer. And times independently of my balcony power plant project here, since it does not play a role: In my opinion, advertising it as a “portable power station” is really stretching the designation. With the two handles, the Delta 2 Max can be carried back and forth quite well, but I wouldn’t want to take it on a long journey. There are understandable reasons why the next larger version comes with wheels.
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