EcoFlow recommends setting the Depth of Discharge to 80/20 (60% use) to prolong battery life, which is fine in semi-permanent installations. But for most users, you will set it to 100/0 to give you 100% battery use.

What to do with 4000W? Harvey Norman experts say the biggest issue with portable power stations is underestimating the watts needed and the watt-hours desired. We discuss that later.

Do not buy cheaper generic Lithium-ion power banks – these are dangerous. Read Warning – 164 Lithium-ion battery fires in 6 months in NSW alone. Also read Is there a safe way to charge Lithium-ion batteries?

My builder recently bought the EcoFlow DELTA 2 Max 2048Wh, which powers home build sites all day, including a small fridge, safety lighting, and power tools. He will get one now that the EcoFlow DELTA Pro 3 is available. “You can never have enough power,” he says.

The Low-PV port takes 11V-60V DC up to 20A and 1000W. Two 48V/9.8A panels wired in parallel could provide 48V/19.6A/941W. The $39.90 2.5m XT60i charging cable is required.

At 51.5kg, it is not really portable – luggable with the integrated handle and wheels, so it is not the kind of device you will use around the weekend campsite (unless you are Hulk Hogan). Still, it is an excellent addition to a motorhome or RV, especially if you have a ‘storage boot’. My friend has a 12kg 1024W EcoFlow Delta 2 in his motorhome, and it suits them well – except when they run the microwave, fridge and TV simultaneously. “I need a little more wattage”.

If there is one criticism of the EcoFlow DELTA Pro 3 (and all EcoFlow units), it is the lack of accessories inbox. You get the unit, a 240V power cable, and a pair of pads to wrap around the lifting handles.

It has a 51.2V/80A/4096W DC battery. Theoretically, it can power 4096 watts for an hour (Wh). However, DC to AC inverter efficiencies, depth of discharge, and power the unit uses need to be factored in. The question we will answer later is how much of the 4096W you can use.

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An Ethernet port connects to a $169 DELTA Pro Remote Control Panel (not tested), which appears only to reflect the AC and DC power out and battery state.

EcoFlow does not state the inverter efficiency converting DC to AC. Given the portable fridge test results, we think that is around 90%. The unit appears to use about 15-18W when idle. So, the rule of thumb is to allow a 5-10% margin of error.

EcoFlow has a portable (13kg), four-segment, foldable, IP68, 48V/9.8V 400W rated solar panels. They are Unfolded 105.8 x 236.5 cm x 2.5 cm and Folded 105.8 x 62 x 2.5 cm

And if you have devices that may surge when they start, like an electric blanket, a water heater, or a heat pump, it has a momentary surge to 6000W and can run up to 8000W with its X-Boost feature.

You could also use the larger unit for fridge/freezer backup. Our local takeaway store has a 2000Wh unit that gives up to 20 hours of protection to its freezer, which holds thousands of dollars of food. It was cheaper to get a UPS than insurance.

There is a dedicated CEE 16A 230V/16A/3680W RV socket. Coupled with AC, solar, and other charging forms, this may be an excellent off-road backup.

The EcoFlow DELTA Pro 3 will tell you each device’s wattage as you plug them in, allowing you to calculate a typical load. It also indicates the battery run-time. You may find that you need extra batteries, or conversely, you can use a lower Wh unit.

We use Fail (below expectations), Pass (meets expectations), and Exceed (surpasses expectations or is the class leader) against many of the items below. We occasionally give a Pass(able) rating that is not as good as it could be and a Pass ‘+’ rating to show it is good but does not quite make it to Exceed. You can click on most images for an enlargement.

If you want to know more about portable power stations, our guide, Portable Power Stations – power on the go is the best place to start.

The $139 Smart Generator Adapter allows for more amperage, and you can use the extra battery port. Alternatively, you can use the AC power cable socket for 230V/10A/2300W.

Although only approved for use in the US (at present), an Ecoflow Smart Home Panel can permanently wire up to three EcoFlow DELTA Pro 3 and six extra batteries into the home grid.

Enable GFCI/RCD support in the mobile app and plug a Gen 2 adapter into the battery, with one end plugged into the car’s NACS port. This has not been tested but provides around an hour of EV use.

At 69.3 x 34.1 x 41cm x 51.5kg, it is definite hernia material. Fortunately, it has integrated rear wheels and an extendable carry handle. The hardest part is the 50kg lift out of the shipping box via two conveniently located front and rear carry handles (and it also provides handle padding).

A typical small home or apartment consumes about 300Wh (fridge, standby sleeping devices, and internet) and goes to 3000Wh with cooking and lights. This unit can be hooked into solar panels (usually on the balcony), and a qualified electrician can fit an isolation switch, which means the battery powers everything until it runs out.

I am going home solar and will install panels with about 10kW generation capacity, Enphase microinverters, and two Enphase IQ 5kW batteries. These will provide 7.68kVA constant power and nearly double that in surge power. The system will run the whole home, including A/C, and have EV 7.2A charging.

Portable power stations are the next big thing, even if you don’t know you need one. We have three, ranging from 200 to 2000W, and they have saved us many times during blackouts. Of course, once we have rooftop solar, we will still use two as UPSs.

To put this into perspective, it can power up to a 4000-watt load for an hour or 2,000 for two hours, etc. If that is not enough, you can add up to 2 x 4000W expansion battery packs—still a 4000W load but 12kWh (think of more fuel in the tank).

The EcoFlow DELTA Pro 3 uses a new battery pack that stacks the cells vertically to minimise the potential for damage. It also has a fireproof, hard shell and IP65-rated casing, although the external unit is not IP65-rated. Batteries are in packs and connected 8S/2P (serial/parallel), which is a safer way to get a 51.2V/80A/4096W battery pack than the cheaper 4S/4P to get a 25.6V/160A/4096W output. Remember that volts do not kill – amps are deadly, and EcoFlow puts safety first.

As you read on, you will see that almost every input or output (apart from 230V and USB) needs a special adapter. To EcoFlow’s credit, at least they have them on the website.

The EcoFlow App for Android or iOS lets you control, monitor, and automate power consumption. The images are self-explanatory.

LiFePO4 batteries are not as energy-dense as Lithium-ion batteries. They do not contain elements that create toxic gasses when burned and are not subject to thermal runaway, so we consider them far safer.

This can draw up to 4000W (230V/17.5A) during charging, but most power points only deliver 230V/10A/ 2300W and take about 2.2 hours (100 minutes). You can adjust the wattage charge rate in the app or via a switch on the unit.

The $49.90 100cm DC5521 to DC5525 is a standard 5.5mm x 2.1mm DC male-to-male cable. It uses a barrel plug and can be used for any DC 12V/5A/60W appliance.

We have found that cheap generic brands use lower-efficiency inverters, may use Li-Ion batteries, have more batteries in parallel (to achieve the higher wattage), and have a lower depth of discharge, so stick to brands like EcoFlow.

A cigarette lighter socket is nominally rated 12V/10A/120W. The $49.90, 1.5m EcoFlow car charging cable plugs into the cigarette lighter socket and the other end to the Low-PV port, which can handle over-voltage and over-amperage. Some vehicles can be fitted with 12V/20A/240W outlets.

You can extend the capacity (think of this as fuel) by adding up to two 4096Wh  EcoFlow DELTA Pro 3 Smart Extra Batteries. These are $3999 each but can be bundled for better pricing. They stack on top of the unit.

The EcoFlow DELTA Pro 3 portable power station is a 4096Wh semi-portable power station perfect for emergency home backup, off-grid living, and disaster preparedness.

The App requires you to establish an account and agree to the privacy policy (at the end of the review). It is benign and safe to accept.

CyberShack offers consumers a one-stop-shop for the most current information in the tech space, including news, lifestyle and products, as well as reviews on the latest gadgets and games. It also runs competitions and has links to the latest episodes of Cybershack TV.

EcoFlow also has a $799, 800W Alternator Charger that runs off the car alternator. It provides charge, reverse charge and battery maintenance modes and can top up a DELTA battery at 1000W every 80 minutes.

Consumer Advice: Most Australian homes have 230V/10A/2300W rated power sockets and at least two power circuits protected by 20A circuit breakers (that allows for a combined total of 4600W). Older homes may only have 10A circuit breakers. If you trip the circuit breaker, it simply means that the device is faulty or draws more than 2300W.

You can charge at EV stations or a 7.2kW charge port at home (if installed). The $169 connector supports Type 1 and 2 EV connectors and plugs into a special AC Power In/Out connector on the back.

The unit is not waterproof; you can buy a $159 waterproof cover with flaps for heat management. In any case, it Is meant for use sufficiently far from humans, and the overall noise is <30dB.

If you have essential services like the Internet, Phone, CPAP machine, etc., the unit can switch in 10ms from mains power to battery to keep these going. The 4000W EcoFlow DELTA Pro 3 is overkill, and I use a smaller unit on my Gateway/Router/Switch/Smarthome hub/Light hub, etc. These total about 80W, and a small $499 River 2 300W/256Wh gives me about 3 hours. The attached devices are sensitive, and the EcoFlow pure sinewave means no glitches from under-or-over-power, black-or-brown outs, spikes, surges, etc.

We are also tightening up on grading. Pass means meeting expectations for the price bracket. We consider a Pass mark to be 70+/100 with extra points added for class-leading and excellence.

In our opinion, Bluetti is the only other brand worth considering. It offers a range of high-capacity home backup units and extra batteries of similar quality.

Medela symphony power cordamazon

Theoretically, it could take three 48V/9.8A/400W panels wired in serial for 144V/9.8A/1411W. Considering efficiency factors, this could charge the unit in <10 hours.

Let me tell you that technically, I could use two to three EcoFlow DELTA Pro 3 and suitable controllers (not in Australia yet) to achieve the same ends, probably for a lower cost. So, these are the way to go if you have an off-grid shack.

We could not test overall heat generation, but the exhaust was about 40°. However, the unit always felt similar to the ambient temperature.