Greetings, and welcome to another in-depth product review here! In this post, we’ll be taking an in-depth look at the brand new EcoFlow Delta II portable power station. For those not familiar with EcoFlow, they’re one of the leading manufacturers of solar generators and portable power stations. Their original Delta power station first launched back in 2019 and was one of their most popular models. However, it did have some drawbacks that many users complained about. Now, EcoFlow is back with the next generation – the Delta II! This new version promises to improve on the original in almost every way.
In this review, we’ll take you through all the key specs, features and improvements on the Delta II. We’ll test it head-to-toe in our secret laboratory and share the results so you know exactly what you’re getting with this new power station. Strap in and get ready for a wild ride as we see if the EcoFlow Delta II lives up to the hype!
Overview of the EcoFlow Delta II
The EcoFlow Delta II is the much anticipated successor to EcoFlow’s best-selling Delta 1300 model that originally launched back in 2019. This newest iteration aims to address the shortcomings of the original Delta 1300 and add several new features that make the Delta II a major upgrade.
Some of the key upgrades of the Delta II include:
- App connectivity and remote monitoring/control through WiFi
- Ability to adjust the AC charge rate through the app
- Higher solar input capacity of 500W (vs 400W on Delta 1300)
- Modular battery expansion system to double capacity
- Safer and longer-life LFP batteries (lithium iron phosphate)
- Additional USB outputs like 100W USB-C Power Delivery
- Simple one-cable connection to extra batteries
With these improvements, the Delta II maintains the portable power station category leadership that the original Delta 1300 had achieved. It provides 1800W of power capacity with standard AC outlets and USB ports, fast recharging, a lightweight and compact form factor, and overall better performance and usability.
Design and Construction
The EcoFlow Delta II has a compact and portable design, making it easy to transport and use in a variety of environments. Despite its small size, it packs in a large battery capacity.
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The unit measures 12.6 x 8.3 x 8.2 inches (32 x 21 x 20.8 cm). This footprint is similar to a small piece of luggage, so it won’t take up much space.
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It weighs 22 pounds (10 kg). While not incredibly lightweight, this reasonable weight makes it simple to move around by hand or in a vehicle.
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The case is constructed entirely from durable ABS plastic with an attractive matte finish. This encloses all the internal components to protect them from dust, moisture, and shocks.
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There’s an extendable handle on the top and a pair of wheels on one end. This allows the Delta II to be rolled around like wheeled luggage.
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The overall build quality feels very solid with no flexing or loose parts. EcoFlow designed this power station to withstand the rigors of portable use.
Display and Interface
The Delta II has a typical EcoFlow color screen that shows input power, output power, time remaining for charge and discharge, battery percentage, and status icons.
Some key details about the display and interface:
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The screen provides basic metrics and status information with a simple interface. It’s easy to see the key details needed during operation.
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There are several buttons below the screen to navigate between screens and modes. The interface is straightforward and simple to operate.
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On the front panel, the Delta II has a set of AC outlets, various DC ports (USB-A, USB-C PD, 12V car outlet), and the controls for turning the unit on and off. The ports are clearly labeled for convenience.
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There is also a wireless control button that enables connecting the Delta II to the EcoFlow app over WiFi. This allows monitoring and controlling the unit remotely.
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On the back, there is the input for connecting solar panels and additional ports based on the model. The Delta II keeps ports neatly arranged and spaced to allow access.
Overall, the Delta II focuses on delivering the key info you need on the display while keeping the interface simple and the ports conveniently accessible. EcoFlow stuck to their straightforward design approach with the Delta II’s interface.
Battery Specs
The EcoFlow Delta II comes equipped with a 1,024 Wh Lithium Iron Phosphate (LiFePO4) battery. LiFePO4 is known for its safety, stability, and long lifetime compared to Lithium Ion.
The battery is rated for 3,000 cycles while maintaining at least 80% of its original capacity. For perspective, if charging daily that equals over 8 years of useful life.
With a capacity of 1,024 Wh, the Delta II can power appliances and devices for extended periods of time off-grid. How long it will last depends on the power consumption needs being met.
Inverter and Output
The EcoFlow Delta II sports a pure sine wave inverter, which is important for powering sensitive electronics without damage. The inverter has a rated wattage of 1,800 watts. This allows you to run appliances and tools up to 1,800 watts.
The Delta II has 6 AC outlets for connecting devices and appliances. This includes 2 three-prong outlets and 4 two-prong outlets. The three-prong outlets are useful for devices that require a ground connection.
The Delta II also features EcoFlow’s X-Boost technology, which can temporarily provide up to 2,200 watts to start motors or compressors that require extra surge power. However, X-Boost does this by lowering the voltage, so it’s only compatible with certain appliances.
Overall, the pure sine wave inverter provides clean and stable power with ample wattage capacity for most needs. The 6 AC outlets give you flexibility in what you can power. And X-Boost lets you temporarily run devices requiring extra startup power.
Charging Options
The EcoFlow Delta II offers several convenient ways to recharge the battery.
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For AC charging, an included power adapter can charge the Delta II from a wall outlet at up to 1200W. EcoFlow claims the battery can charge from 0-80% in around 50 minutes at the maximum 1200W input. Expect a full 0-100% charge to take about 1.5 hours.
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The Delta II has an MPPT solar charging input that allows you to connect solar panels rated up to 500W. The solar input accepts 11-60V DC. With maximum 500W solar input, EcoFlow claims a full recharge takes around 3 hours which is very fast for a portable power station in this size class.
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There’s also a 12V car charging cable included that lets you recharge from a car’s 12V power outlet. This is the slowest charging option, taking an estimated 12-15 hours for a full charge due to power limitations from a car’s 12V outlet. Still, it provides charging flexibility if AC or solar aren’t available.
Expandable Battery
One of the most innovative features of the EcoFlow Delta II is its expandable and modular battery system. The Delta II comes equipped with a 1.1kWh LFP battery pack. But you can double the capacity to 2.2kWh by connecting either the 1kWh EcoFlow Delta 2 Extra Battery or the 2kWh EcoFlow Delta Max Extra Battery.
The extra batteries are designed specifically for the Delta II and connect via an easy “plug and play” cable system. There’s no complicated setup or configuration required. You simply connect the battery expansion cable between the Delta II and the extra battery module. The Delta II automatically detects and integrates the additional capacity.
The modular add-on batteries don’t have any controls, ports, or extra features – they are purely for adding more battery storage. This helps keep costs down and allows EcoFlow to offer the expansion batteries at an affordable price point compared to buying a whole separate power station.
The Delta Max Extra Battery provides the cheapest capacity-per-dollar, offering a full 2kWh for minimal additional cost over the 1kWh version. Paired with the Delta II Base, you can achieve a formidable 3.1kWh capacity for under $1500 – an incredible value.
The expandable battery design means you can easily scale your power needs up or down. Start with the base Delta II and add more capacity later as your needs grow. The modular approach provides flexibility and helps future-proof your investment.
App Connectivity
The EcoFlow Delta II supports the EcoFlow app which lets you monitor and control the power station remotely. With the app, you can:
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View real-time metrics like input and output wattage, remaining battery percentage, and estimated time remaining. This gives you a comprehensive look at what’s happening with the Delta II.
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Turn the Delta II on and off remotely. This is convenient if you want to power down the station when not in use to conserve energy.
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Adjust the AC charge rate when charging the Delta II from a wall outlet. You can optimize the charge rate based on the available power.
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Update the firmware on the Delta II to ensure you have the latest features and bug fixes.
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Set up custom presets for different uses like RVing or emergency power. The presets automatically adjust settings for that particular usage.
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Monitor your charging and discharging history including graphs. This helps give you visibility into your power usage over time.
The app connectivity makes it simple and convenient to monitor and manage the Delta II from your smartphone. With remote monitoring and control, you don’t have to be right next to the power station to know what’s going on or make adjustments if needed.
Testing and Results
I put the Delta II through extensive testing in his secret laboratory. Key tests included:
Battery Capacity
- The Delta II has a 1024 Wh LFP battery rated for 3000 cycles.
- Battery capacity tests showed 800 Wh or 78% of rated capacity.
- While decent, this is lower than some other EcoFlow models.
Inverter Capacity
- The 1800W pure sine wave inverter exceeded its rating, hitting 2400W before overload.
- This shows it can handle brief 2200W surge loads despite its small size.
Charging Rate
- The built-in AC charger recharges at up to 1200W, with 80% charge in 50 mins.
- From solar, it charges at 500W max with full recharge in ~3 hours.
- 12V charging is slower at 128W max or 10A. An early firmware bug allowed higher 15A charging.
The Delta II performed well in lab tests overall. Battery capacity was a bit lower than expected but still decent. The 1800W inverter exceeded its rating. And charging rates were excellent from AC and solar. An early firmware bug allows higher 12V charging over 10A but EcoFlow will likely address this.
UPS Capability
The Delta II has the ability to act as an uninterruptible power supply (UPS), which allows it to provide backup power instantly in the event of an outage. This is enabled by an internal switching relay that automatically switches to the Delta II’s battery power if the AC input is lost.
In testing, there was an noticeable but brief interruption when switching from AC to battery power, enough that sensitive devices like computers would turn off. The transition when power is restored is also not seamless. So while it can act as a basic UPS, the switching is not fast enough to keep devices like computers from resetting. This capability is better suited to less sensitive devices.
The Delta II’s UPS functionality is more rudimentary than some competitors which offer true sine wave output and seamless switching that is fast enough for computers and other sensitive electronics. So if you need a portable power station that can provide backup power without any interruption, the Delta II may not be the best choice. However, as a basic backup for less sensitive needs, its UPS capability is a useful feature.
Noise Level
One downside of the EcoFlow Delta II is that the cooling fans are quite loud when in use. The fans run at high speed whenever the unit is charging, discharging, or even just turned on.
Tests measured the noise at 65 decibels from several feet away. That’s about the same loudness as a loud conversation. So the fans essentially sound like a hair dryer running whenever the Delta II is on.
The noise is understandable given the small size of the unit and the cooling needs when charging or discharging at over 1,000 watts. But it may be an annoyance for some users who want to run the Delta II in a living space. The high fan noise makes it less suitable for use indoors unless the unit can be located far from the main living area.
So potential buyers should be aware that the Delta II does have loud cooling fans. That may limit where the unit can be comfortably used. But it’s a reasonable trade-off to get 1800+ watts of power in such a compact package. Just don’t plan to run it right next to your family room couch.
Pros and Cons
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Pros:
- Affordable price under $1,000
- Lightweight and portable
- 1800W pure sine wave inverter
- Lithium iron phosphate (LFP) battery is safe and long-lasting
- Fast charging from solar, AC, and 12V sources
- Expandable battery capacity
- Supports 500W solar input
- Excellent app connectivity and monitoring
- 5 year warranty
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Cons:
- Very loud fans
- UPS functionality too slow for computers
- Battery tested at only 80% of rated capacity
- Add-on battery lacks additional features
- Cannot charge from AC and solar simultaneously
- Voltage drop when using 12V outlets at full load
In summary, the Delta II packs a lot of functionality into a compact and affordable package. The pure sine wave inverter, fast charging speeds, app monitoring, and expandable capacity are all excellent features. However, the loud fans, lackluster UPS performance, lower tested battery capacity, and limitations around simultaneous charging hold it back from being perfect. Still, given the sub-$1,000 price point, the Delta II delivers outstanding value overall if you can live with some compromises.
Pricing and Availability
The EcoFlow Delta II launches on May 25th, 2022 with an MSRP of $999 for the base unit. This is a fantastic price point for a portable power station of this capacity and capabilities.
EcoFlow is offering an exclusive discount for my viewers. Use the link in the blog description to get the Delta II for only $899, a $100 discount off MSRP.
There are also discounted bundles available with solar panels:
- Delta II + 220W Solar Panel for $1099 (Reg $1248)
- Delta II + 400W Solar Panel for $1349 (Reg $1498)
These bundle deals represent significant savings over buying the items separately. The solar panels allow you to recharge the Delta II completely from the sun in just one day.
The Delta II provides excellent value for performance and features. The launch discount makes it very attractively priced, especially compared to competitors like the Jackery 1000 Pro which retails for $1299. Take advantage of the exclusive HoboTech coupon to get the Delta II at the lowest price.
Competitors
The EcoFlow Delta II enters a competitive market, but manages to stand out with its features and pricing. Here’s how it compares to some top competitors:
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Jackery 1000 Pro – The Jackery 1000 Pro is a 1000Wh lithium battery power station that launched around the same time as the Delta II. It offers similar capacity but lacks the Delta II’s expandable battery, faster charging speeds, and advanced features like X-Boost. The Jackery is more expensive at a $1299 launch price.
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Bluetti AC200MAX – The Bluetti AC200MAX is a 2048Wh expandable lithium battery station. It offers more capacity but comes at a much higher $1899 starting price. The Delta II matches or exceeds it in other areas like charging speed, expandability, and advanced features.
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Goal Zero Yeti 1500X – The Yeti 1500X is Goal Zero’s top of the line offering at 1502Wh capacity. It costs significantly more at $1999 and while it has excellent capacity, it doesn’t have the same fast charging, app connectivity, or advanced features as the Delta II.
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Anker 757 PowerHouse – The Anker 757 PowerHouse is another 1000Wh competitor but is less feature-packed. It lacks app support, expandable batteries, and X-Boost technology. However, it does have an affordable $999 price point.
Overall, the EcoFlow Delta II stands out in the market by packing premium features and fast charging into an expandable lithium battery at a competitive price point under $1000. Competitors either offer less features at a similar price, or match the Delta II’s capabilities at a higher cost.
Recommended Accessories
The EcoFlow Delta II is designed to pair nicely with EcoFlow’s folding portable solar panels. Here are some of the best solar panel options to maximize charging from the sun:
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EcoFlow 110W Portable Solar Panel – This compact folding panel can recharge the Delta II from 0-80% in 4-5 hours in ideal sunlight. Easy to pack and transport.
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EcoFlow 220W Portable Solar Panel – Twice the wattage gets you 0-80% in just 2-3 hours. The increased power makes this a great choice for quick charging.
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EcoFlow 400W Portable Solar Panel – The largest single panel EcoFlow offers, with 4x 100W solar cells. This will recharge your Delta II in just 1.5-2 hours with full sun. Maximum solar charging speed.
For a permanent solar setup, you could use a 400W wind/solar hybrid charger, or multiple rigid solar panels wired in parallel. The Delta II works with any 11-60V solar array up to 500W.
Having portable backup power is great, but pairing it with solar helps you recharge off-grid and harness renewable energy from the sun. The faster the solar charging, the better in emergency situations.