EcoFlow STREAM series explained: How the smart balcony power plant with storage works

The EcoFlow STREAM series is a well-designed overall system and consists of the following components:

• EcoFlow STREAM Microinverter (800 W)
• Storage solutions: AC Pro, STREAM Pro or STREAM Ultra
• EcoFlow App with AI support (Eco-AI)
• Optional accessories such as smart plugs, smart meters or PV terminal holders
• Optional solar panels (The storage devices are compatible with 99% of all solar modules (MC4)

All components work seamlessly together and can be flexibly expanded. The system harmonizes with maximum efficiency with the SOLA Frame solar modules For balcony power plants from WATTSTUNDE ( see sets ). Thanks to their high compatibility and robust construction, the modules can be optimally combined with the STREAM system, forming a strong and high-quality unit both technically and visually.

The components in detail

EcoFlow STREAM Microinverter (800 W)

The STREAM microinverter connects your solar panels directly to your home's electrical system, converting the generated direct current (DC) into usable alternating current (AC). Thanks to its two PV inputs, each capable of handling up to 600 W, it can accept a combined input capacity of up to 1200 W. With an output power of 800 W and an impressively low starting power of just 3 W, it operates with exceptional efficiency – even in low sunlight. This makes it the ideal choice for continuous operation throughout the day, even under less than optimal lighting conditions.

Technically, it offers:

• Input voltage: 16 – 60 V DC
• AC output current: 3.48 A
• Communication: Wi-Fi & Bluetooth
• Protection class: IP67 (dustproof, waterproof)
• Operating temperature: -40 °C to +65 °C

Thanks to plug and play, installation is straightforward and can be done without an electrician. The connection to the EcoFlow app enables complete monitoring and control in real time.

STREAM AC Pro – The retrofit solution for your existing setup

The AC Pro is a fully AC-coupled storage solution, ideally suited for retrofitting existing balcony solar systems. It boasts maximum compatibility and can be operated with virtually all commercially available microinverters. The major advantage: Installation is straightforward and requires neither modifications to the solar array nor specialized expertise. The system automatically detects your consumption patterns and adapts to your individual needs through intelligent storage and discharge processes. This ensures that the stored electricity is used precisely when you need it – without any manual control.

Technical details:

• Capacity: 1.92 kWh per unit, expandable up to 12 kWh
• AC output: 1200W (800W grid-tied)
• Bypass power: up to 2300 W
• Lifespan: up to 6000 charging cycles (at 70% remaining capacity)
• Connection: Wi-Fi/Bluetooth
• Protection class: IP65 (dustproof and protected against water jets from all directions, suitable for outdoor use)

The AC Pro can also be used without a PV system – for example in combination with dynamic electricity tariffs and the integrated Eco-AI.

STREAM Pro – The smart all-in-one system

The STREAM Pro is a hybrid solution with an integrated inverter and three independent 500W MPPT inputs. This means you can feed up to 2000W of PV power into the grid from differently oriented module groups. This versatility ensures particularly high efficiency – whether in the morning, at midday, or in the evening.

Technical details:

• PV inputs: 3 x 500 W MPPT
• AC output: 1200W (800W grid-tied)
• Capacity: 1.92 kWh, expandable to 12 kWh
• Bypass power: 2300 W
• Lifespan: 6000 charging cycles
• Connectivity: Wi-Fi/Bluetooth, Eco-AI

With its weatherproof, compact design (IP65), the STREAM Pro fits both on the balcony and in the living room.

STREAM Ultra – For maximum performance and independence

The STREAM Ultra is the top model in the series and offers four powerful MPPT inputs with a total PV output of 2000 W. Thanks to the precise control of different module groups, you get the maximum performance from your solar system – even with shading or varying roof pitches.

Technical details:

• PV inputs: 4 x 500 W MPPT
• AC output: 1200W (800W grid-tied)
• Bypass power: 2300 W
• Capacity: 1.92 kWh (scalable up to 12 kWh)
• Weight: 23.1 kg
• Dimensions: 284 x 255 x 458 mm
• Protection class: IP65 (dustproof and protected against water jets from all directions, suitable for outdoor use)
• Lifespan: up to 6000 charging cycles

The STREAM Ultra is particularly suitable for households with high energy demands, home office setups, or users who seek maximum flexibility and self-sufficiency.

feature	AC Pro	STREAM Pro	STREAM Ultra
type	AC-coupled	Hybrid with inverter	Hybrid with inverter
PV inputs (MPPT)	-	3 x 500 W	4 x 500 W
Maximum PV output.	-	1500 W	2000 W
capacity	1.92 – 12 kWh	1.92 – 12 kWh	1.92 – 12 kWh
AC output	1200 W (800 W mains-powered)	1200 W (800 W mains-powered)	1200 W (800 W mains-powered)
Bypass power	2300 W	2300 W	2300 W
steering	EcoFlow App, Eco-AI	EcoFlow App, Eco-AI	EcoFlow App, Eco-AI
Special features	Ideal for retrofitting	3 MPPT for module groups	4 MPPT for maximum flexibility
Protection class	IP65	IP65	IP65
Charging cycles	up to 6000	up to 6000	up to 6000

Overview of storage solutions comparison

• AC Pro The AC Pro is the ideal choice if you already operate a balcony power plant and want to easily expand it with a storage system. The system is fully AC-coupled and can be integrated without any changes to your existing setup. You don't need any PV inputs or a new inverter – simply connect it, configure it via the app, and you're good to go. This makes the AC Pro perfect for anyone who wants to quickly and easily get more out of their self-generated energy.
• STREAM Pro STREAM Pro is aimed at anyone who wants to combine their balcony power plant with a storage system and inverter from the outset – or who wants to future-proof an existing solution. Thanks to three separate MPPT inputs, you can operate multiple module groups independently. This ensures significantly greater efficiency, especially with modules oriented differently. STREAM Pro is therefore the right solution for households with typical peak consumption and medium to high electricity demand.
• STREAM Ultra STREAM Ultra is designed for anyone seeking maximum energy independence and unwilling to compromise on performance and flexibility. With four MPPT inputs, high output power, and large storage capacity, it unlocks the full potential of your PV system – even in more complex setups or when high continuous loads need to be covered. STREAM Ultra is ideal for larger households, home offices, and smart energy systems with multiple consumers.

What makes the STREAM series different from conventional balcony power plants?

EcoFlow goes significantly further than classic balcony PV sets:

• Storage integration: You use the electricity you generate during the day yourself in the evening.
• App and AI control: You can see live how much electricity you generate, store and consume.
• Smart home integration: Control your energy flows via Shelly, Tibber, Tapo & Co.
• Flexible system design: Various storage options, scalable up to 12 kWh.

With the EcoFlow STREAM series, you don't just get a simple balcony power plant, but a true energy hub for your home. It anticipates your needs, controls automatically, and adapts to your daily routine – an intelligent energy manager that combines technology, comfort, and performance on a new level.

The AC Pro, Pro and Ultra storage solutions differ in their design, but pursue a common goal:

Greater energy efficiency through targeted storage and use.

• AC Pro: Ideal for retrofitting, AC-coupled, flexible, compact
• Pros: Integrated inverter, 3 MPPT inputs, space-saving, perfect for households
• Ultra: Maximum PV power output over 4 MPPT, high flexibility for demanding setups

Each solution is scalable from 2 to 12 kWh and designed for longevity with up to 6000 charging cycles. You can use the batteries decentrally – e.g., one in the living room, one in the office – so electricity is stored where you need it.

Plug & Play: EcoFlow works that easily

The setup is simple:

• Connect solar panels (MC4-compatible connectors are sufficient)
• Connect the microinverter to a wall socket (AC-Pro only) and the app.
• Connect storage devices (depending on the model, directly or via AC)
• Monitor and control everything in the EcoFlow app

No electrician required. Thanks to Plug & Play, you can set up your system completely yourself.

Intelligent control with app & AI

The EcoFlow app connects all components. You control it via smartphone:

• Charging and unloading times (also automated)
• Real-time power flows
• Prioritizing consumers
• Integration with Smart Plugs, Shelly, Tibber or Tapo

With Eco-AI Even more intelligence comes into play: The system analyzes your consumption and optimizes usage based on dynamic electricity tariffs (AI-TOU mode).