STREAM Ultra X vs STREAM Pro: which balcony kit?
3.84 kWh flagship versus 1.92 kWh modular — plug-in storage, not a camping station.
1. STREAM is not a RIVER
STREAM is home / balcony self-consumption: panels, micro-inverter, plug-in battery. It is not a block you carry into the woods.
In France, injection power, HOA and Enedis / Consuel depend on the setup. Check current rules; this guide is not an installer.
2. Ultra X: large storage in one step
Ultra X: ≈ 3.84 kWh, high AC output (≈ 2 300 W class on the sheet), several MPPTs. For a household that wants to shift solar into the evening without expanding immediately.
Heavier spend, installation to plan (weight, mounts, cables). If the roof / balcony is small, you will not use all the theoretical solar.
3. Pro: start smaller, scale
STREAM Pro: ≈ 1.92 kWh, expansion to a much higher stack depending on config. Up to 3 MPPTs. Good to trial a winter, then add a battery.
You accept a tighter first night. If evening loads (hob, oven) are heavy, Ultra X or a middle rung (Max) may fit better.
4. Micro-inverter only vs battery
Without a battery you mainly inject / self-consume by day. With a battery you smooth the evening. STREAM’s micro-inverter sits in that ecosystem — not on a random camping DELTA.
PowerStream is another thread (often paired with existing stations). For a new FR setup, STREAM is the current push. Dedicated hub: STREAM vs PowerStream.
5. Balcony checklist
Shade, orientation, HOA, cable runs, injection cap. Estimate useful kWh/day vs the bill, not marketing Wp alone.
Prices and bundles on the sheets. No quote and no Enedis study here.
- Trial then scale → Pro
- Ambitious evening storage in one buy → Ultra X
- Daytime only, no battery → micro-inverter / 800 W kit within the rules
Amazon affiliate links. Learn more