EcoFlow STREAM Ultra vs Jackery SolarVault 3 Pro Max
Technical comparison · All-in-one
These are two balcony batteries with the same grid feed-in limit (800 VA), four MPPT inputs and the same 10-year warranty. What separates them is how much PV they accept (2000 vs 4000 W) and how they behave in an outage (manufacturer-declared values).
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 1.92 kWh | 2.52 kWh |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 676.56 €/kWh | 287.7 €/kWh |
| List price | 1299 € | 725 € |
| Weight | 23.1 kg | 26.5 kg |
| Dimensions (W×D×H) | – × – × 45.8 cm | — |
| How long it lasts | ||
| Battery life cycles | 3650 cicli | 3650 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | 6000 cicli | 6000 cicli |
| Capacity at end of cycle life | — | 70 % |
| Warranty | 10 anni | 10 anni |
| The numbers | ||
| Cost of stored energy | 0.185 €/kWh | 0.079 €/kWh |
| Energy density | 83.1 Wh/kg | 95.1 Wh/kg |
| Identity | ||
| Use tier | F2 — Room-sized (1–3 kWh) | F2 — Room-sized (1–3 kWh) |
| Price | ||
| Price | ~450–1000 € | ~450–1000 € |
| Universal specs | ||
| Voltage | 230 V | 230 V |
| Category specs | ||
| Depth of discharge | — | 90 % |
| Expandable | Yes | Yes |
| Maximum expanded capacity | — | 15.12 kWh |
| Battery voltage | 19.2 V | 41.6 V |
| Feed-in limit | 800 VA | 800 VA |
| Inverter included | No | — |
| Maximum solar input | 2000 W | 4000 W |
| MPPT trackers | 4 | 4 |
| Grid charging | Yes | Yes |
| Maximum charge power | — | 3.68 kW |
| Dynamic tariffs | Built in | Built in |
| Backup power | EPS (brief interruption) | UPS |
| Backup output | 1200 W | 1600 W |
| Switchover time | — | 20 ms |
| Ingress protection | IP65 | IP65 |
| Mounting | — | Floor standing |
| Minimum temperature | -20 °C | -20 °C |
| Maximum temperature | 55 °C | 55 °C |
| Cell heating | — | Yes |
| Works without internet | With limitations | With limitations |
| App required for setup | Yes | — |
| Declared standards | CE | VDE-AR-N 4105, IEC 62619 |
The differences that matter
- Solar input 2000 W vs 4000 W → how many panels go onto the 4 MPPT inputs; above 2000 W you need the second.
- Backup 1200 W in EPS vs 1600 W in UPS → how many loads stay on in an outage and whether the changeover has a pause.
- 1.92 kWh vs 2.52 kWh, 23.1 kg vs 26.5 kg → evening energy available against the weight to handle.
- Standards: CE only vs VDE-AR-N 4105 and IEC 62619 → the second declares grid-connection and cell-safety standards, the first only the CE marking.
Which one to choose
Choose EcoFlow STREAM Ultra if…
the panels you have or plan to add do not exceed 2000 W, on a 1.92 kWh, 23.1 kg battery. In an outage you accept 1200 W in emergency mode with a brief pause (EPS).
Choose Jackery SolarVault 3 Pro Max if…
you want to connect up to 4000 W of panels and have 1600 W in an outage with continuity (UPS); capacity is 2.52 kWh. You accept 26.5 kg instead of 23.1.
Where to buy
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