Hey solar fans! I’m absolutely buzzing about EcoFlow’s new STREAM Series, a plug-and-play home solar system that’s set to revolutionize how we power our homes. As a UK-based solar enthusiast using the EcoFlow PowerStream with a Delta 2 and 1.6kWh of solar panels, I’m itching to upgrade. The STREAM Series isn’t out here yet—set for a May 15, 2025 launch—but I’ve dug into the details, and it’s looking like a game-changer. Information is scarce, but here’s what I’ve uncovered so far, including answers to a burning question: can the STREAM Pro feed power to the home grid without the Microinverter? Let’s dive in!
Why I Want to Upgrade My PowerStream
First, a quick recap of my setup. My PowerStream Microinverter (800W, 400W x 2 inputs) and Delta 2 (1kWh storage) power my home with 1.6kWh of solar panels. It’s solid for small loads, but on sunny days, my panels generate more than the Delta 2 can store, and the 800W cap can’t handle big appliances like my washing machine or kettle. Excess solar goes to the grid, which doesn’t maximize my savings. The STREAM Series promises more power, smarter storage, and a fix for these limitations. Here’s how it stacks up.
Meet the STREAM Series Lineup
The STREAM Series offers four key products, each tailored for different solar needs. Here’s the rundown:
- STREAM 800W Microinverter: This compact, grid-tied inverter feeds up to 1200W total from two 600W solar inputs via 2 MPPTs. It’s a big upgrade from my PowerStream’s 400W per input, ideal for simple setups without storage. Perfect for beginners who want solar power to offset grid use during the day. [EcoFlow UK]
- STREAM Pro: An all-in-one beast with a hybrid inverter, 1920Wh battery, and 3 MPPTs for up to 1500W solar input. It delivers 1200W AC output standalone or 2300W when paired with another unit. It’s built for medium-sized homes needing storage and grid feed-in without extra gear.
- STREAM Ultra: The premium option, similar to the Pro but with 4 MPPTs for up to 2000W solar input. It also offers 1920Wh storage and 1200W output (2300W paired). This is my top pick for handling my 1600W panels with room to grow.
- STREAM AC Pro: A 1920Wh AC-coupled battery with no solar inputs, designed to pair with any inverter (like my PowerStream) for flexible indoor storage. It’s great for expanding capacity without replacing existing setups.
All units are IP65 weatherproof, making them reliable for the UK’s rainy days, and mostly plug-and-play, though the UK’s BKW DIY cable requires an electrician for legal grid connection.
Can STREAM Pro Feed the Grid Without the Microinverter?
A big question I had: does the STREAM Pro need the Microinverter to feed power to the home grid? Good news—it doesn’t! The STREAM Pro’s built-in hybrid inverter can feed up to 800W to the grid standalone or 1200W when paired with another unit, like the Ultra or AC Pro. This makes it a one-stop solution for my 1600W panels, storing 1920Wh and powering my home directly without the 800W limit of my PowerStream. The Microinverter is only needed for setups without storage or to add more panels beyond the Pro’s 1500W capacity. For most users, the Pro or Ultra alone handles grid feed-in seamlessly, saving costs and simplifying installation.
Why STREAM Is a Game-Changer
So, why am I so hyped to upgrade? Here are the standout features that make the STREAM Series a must-have:
- 2300W Power for Big Appliances: Unlike PowerStream’s 800W cap, the Pro and Ultra deliver up to 2300W in parallel mode, enough for 99% of household appliances—think washers, dryers, or kettles. No more relying on the grid for heavy loads!
- Decentralized Storage: The STREAM Series lets you place batteries anywhere in your home, connected via Wi-Fi like a mesh network. Scale up to 11.52k научно with 6 units, perfect for my goal of expanding indoor storage without massive costs.
- Oasis AI Savings: The EcoFlow app’s Oasis AI optimizes energy use with dynamic tariffs, prioritizing solar and battery power to cut bills by up to £953 a year. With a premium subscription, the AI-TOU mode adds £51 more savings, a huge leap from PowerStream’s basic controls.
- Plug-and-Play with UK Caveats: The system is DIY-friendly, but UK regulations require an electrician for the DIY cable to comply with G99 grid rules. Still, it’s far simpler than traditional solar installs.
- Off-Grid Option: The Pro and Ultra can run off-grid, delivering 2300W for scenarios like garden houses, a nod to EcoFlow’s portable power roots.
My Upgrade Plan
With my 1.6kWh panels, the STREAM Pro looks like the sweet spot. It handles my full solar input (1500W limit), stores 1920Wh (double my Delta 2), and feeds the grid without a Microinverter. If I want more storage later, I’ll add an AC Pro for another 1920Wh, keeping costs low compared to a full system overhaul. The Ultra’s tempting for its 2000W input, but the Pro’s price-to-performance ratio fits my budget. I might keep my PowerStream as a backup with the AC Pro, but the Pro alone could replace everything.
What’s Next?
The STREAM Series launched in Europe in April 2025 and Utah, USA, in May 2025, but the UK gets it on May 15, 2025. Pre-orders come with perks like a free smart meter (until May 31, 2025) or four smart plugs (April 30–May 2, 2025), so I’m watching uk.ecoflow.com for deals.
Should I go for the STREAM Pro or splurge on the Ultra? Are you eyeing this upgrade too? Drop your thoughts in the comments, and check out my YouTube channel for more solar content. Subscribe to stay updated on the STREAM launch, and let’s power up smarter together!
