The most complete model in the SolarFlow Mix line
The Zendure SolarFlow 4000 Mix Pro is the flagship model in the new SolarFlow Mix series, aimed at households of about 4 people with annual consumption around 7000kWh, noticeably more than the entry-level 3000 Mix AC+.
Its distinguishing feature against the 4000 Mix AC+: a high-voltage dual MPPT regulator that connects new solar arrays directly, reducing the need for additional inverters on a new installation.
A round-trip efficiency claimed at 90%
Like the rest of the Mix line, Zendure states a round-trip efficiency of 90% for the 4000 Mix Pro. No independent measurement of that figure is available to date.
On durability, the unit is rated for 10,000 cycles at 70% remaining capacity, for a lifespan estimated at around 15 years on the basis of two full cycles a day, covered by a 10-year manufacturer warranty.
High-voltage dual MPPT plus a third-party inverter input: up to 13kW combined
This is the Mix Pro's central technical advantage over its little brother. A high-voltage dual MPPT regulator (30 to 400V DC, 8000W total) connects new panels in series directly, without going through a third-party solar inverter, a real difference for a new installation.
It also keeps the dedicated 5000W input that takes the output from an already-installed third-party inverter (Huawei, SMA, Fronius, Enphase, SolarEdge, Sungrow, per Zendure), useful for a renovation project that keeps its existing setup. Combined, these two inputs reach up to 13,000W of total solar input, a rare figure in this segment of modular home batteries.
8000Wh to start, expandable up to 50kWh
Unlike the completely fixed-capacity 3000 Mix AC+, the 4000 Mix Pro expands by adding modules up to 50kWh, real headroom for a household whose needs might grow.
That flexibility comes at a price: the Mix Pro stays noticeably pricier than the 3000 Mix AC+ or even the 4000 Mix AC+, aimed at households with higher consumption.
A fast, generous backup output
During a grid outage, the off-grid output delivers 3680W continuous and up to 7200W peak, with an automatic transfer switch stated at 10 milliseconds. That peak headroom leaves room for appliances with a high startup current draw, like a heat pump or an oven.
This level of backup power comfortably exceeds what most plug-and-play balcony batteries offer, consistent with this model's more ambitious positioning.
Same footprint as the 3000 Mix AC+, mobility still theoretical
The IP65-rated metal casing shares the same dimensions and roughly 80kg weight as the 3000 Mix AC+, mounted on casters to ease repositioning rather than daily nomadic use. The operating range spans -20 to +55 °C, suited to placement under a carport or in a garden shed.
Noise level is stated by Zendure at around 25dB at half load, up to 40dB at full power, with no independent measurement available to date.
HEMS 2.0, the ZenKi 2.0 AI, and Home Assistant and Homey compatibility
Control runs on HEMS 2.0 and the ZenKi 2.0 artificial intelligence, with LAN, RS485, Wi-Fi, and Bluetooth connectivity. The Mix Pro adds compatibility with Home Assistant and Homey, two smart-home platforms popular with advanced users, a step above the rest of the Mix line on this front.
That's a real argument for anyone wanting to fold the battery into an existing smart-home setup rather than relying solely on the manufacturer's own app.
Past 800W, the compliance process becomes unavoidable for a new installation
The same rule as the rest of the Mix line applies: past 800W of input power, comfortably exceeded by this model's combined 13kW, the installation moves beyond the plug-and-play solar kit format.
For a renovation that keeps a third-party inverter already connected and declared, part of the administrative process was already handled beforehand.
Availability subject to occasional stock shortages
This is the most concrete weak point at this stage: Zendure itself acknowledges that the product remains subject to occasional stock shortages depending on the market. It's a commercial rather than technical limitation, and one that could improve over time, but it's worth checking directly before placing an order.
This caveat sets the Mix Pro apart from the 3000 Mix AC+, whose availability isn't flagged as a concern at this time.
Against the 4000 Mix AC+ and the Bluetti Balco 500
Within Zendure's own range, the Mix Pro positions itself as the most complete option against the 4000 Mix AC+, which is purely AC-coupled. Against another recent premium battery like the Bluetti Balco 500, the comparison centers mainly on total solar input.
| Criterion | SolarFlow 4000 Mix Pro | SolarFlow 4000 Mix AC+ | Bluetti Balco 500 |
|---|---|---|---|
| Starting capacity | 8000Wh | 8000Wh | 5024Wh |
| Total solar input | 13,000W (MPPT + third-party inverter) | 5000W (third-party inverter only) | 4300W (1 high-voltage MPPT) |
| Direct MPPT built in | Yes, dual 8kW MPPT | No | Yes, 1 MPPT |
| Bidirectional power | 4000W (5000W bypass) | 4000W (5000W bypass) | 3680W |
| Observed price | £2899 | £2399 | ≈ £1367 |
The Mix Pro stands out for its unique ability to combine direct MPPT with an input for a third-party inverter, giving it the highest total solar input in this comparison. The Mix AC+ remains a more affordable option for anyone who already has an inverter in place and doesn't need direct MPPT, while the Balco 500 offers a cheaper entry point but with more modest capacity and solar input.
Who the SolarFlow 4000 Mix Pro is for
This model suits a higher-consumption household (around 4 people, 7000kWh a year) planning an ambitious new solar installation or a renovation with panel expansion, and wanting capacity that can grow with its needs.
For simply adding storage to an already-installed inverter with no need for direct MPPT, the 3000 Mix AC+ or the 4000 Mix AC+ do the job at a more accessible price. And before ordering, availability is worth confirming directly, along with the grid-connection process to expect for any installation past 800W.
