Growatt SPF series are off-grid inverters with battery storage functionality, designed for installations where independence from the grid and stable power supply for consumers are crucial. These devices combine a sinusoidal inverter and a PV charge controller in a single housing, making them ideal as the core components of home backup power systems, year-round cabins, workshops, and small commercial premises.
Flexible operation with batteries is a key feature in practice - they support popular battery technologies (including lithium) and allow setting priorities for energy sources as well as charging and discharging schedules. The implemented MPPT facilitates maximum yield extraction from PV chains under variable conditions, and at installations with different orientations or partial shading, it enables better generator performance control.
Regarding efficiency, attention should be drawn to European efficiency - it better reflects the inverter's actual performance throughout the day, thus translating to real energy production. Remote monitoring via WiFi or GPRS and a local configuration platform are available. Depending on the variant, CE (LVD/EMC) certificates and the manufacturer's warranty are provided.
Ranking
Specifications
Pros and cons
The SPF series integrates a clean sinusoidal inverter, MPPT charge controller, and UPS module into a single enclosure, eliminating the need to purchase and connect separate devices. This directly reduces the cost and complexity of off-grid installations compared to component-based sets (e.g., Victron components purchased separately).
Selected SPF models (e.g., SPF 5000 ES) allow for parallel operation of up to 6 units, creating a system with a power output of up to 30 kW without the need for an additional, overarching controller. This provides a practical path for expanding the installation without replacing the inverter.
The SPF 3000TL HVM model achieves an MPPT efficiency of 97.9% with a maximum DC PV input voltage of 580 V. A higher string voltage allows for reduced cable losses and increased flexibility in the design of PV string projects.
The series supports both lithium-ion (LiFePO4) and lead-acid (AGM, GEL) batteries, with configurable power source priority (PV / grid / battery) and charging/discharging schedules - parameters that are important when designing hybrid systems.
For European customers, Growatt offers a standard 5-year warranty with the option to extend it free of charge to 10 years (registration within 180 days of installation). In addition, the manufacturer guarantees 24/7 remote technical support with a response time of up to 30 minutes via telephone.
Growatt (founded in 2010) does not appear on public Tier-1 manufacturer lists according to BloombergNEF, as confirmed by the `tier_1_bankable: false` field in the manufacturer's data. For projects requiring bank financing or portfolio insurance, the lack of this status could be a significant obstacle.
The declared conversion efficiency of the SPF 6000 ES+ model is 93%, while direct competitors in the off-grid segment - Victron MultiPlus-II 48/5000 (94-96%) and SMA Sunny Island 6.0H (up to 96.7%) - achieve significantly higher values. In a heavily used system, this difference could translate into noticeable annual losses.
Polish and international users consistently report synchronization errors between the ShinePhone app and the Growatt server, inaccuracies in the presentation of production data, and occasional loss of connection with the WiFi module. In production environments, this often requires local configuration rather than cloud-based solutions.
Alternatives
About the SPF series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.