Growatt SPF DVM-MPV series are low-frequency off-grid inverters with an integrated transformer, designed for islanded operation in residential homes, agricultural estates, workshops, and locations outside the reach of a stable grid. They stand out for their resilience to harsh power supply conditions and reliable startup of equipment with high inrush currents, such as pumps and motors. A key feature is the multi-channel MPPT, which allows effectively managing PV strings with different orientations or partially shaded ones - translating to better yields under real installation conditions. In practice, European efficiency also helps, as it better reflects losses in typical working profiles and indicates how much energy actually reaches consumers and battery charging. The series supports various energy storage types - lithium, lead-acid, and gel-based - and cooperation with PV, the grid, and generators. Remote monitoring is available via (WiFi or GPRS modules), and local operation through PVkeeper. The manufacturer provides certificate documentation for models, while warranty conditions depend on the region and distributor.
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The built-in low-frequency transformer wound with pure copper enables up to 2× nominal power delivery at peak loads (e.g., SPF 6000T: 6 kW nominal, 7 kW peak). This ensures reliable startup of pumps, motors, and compressors - a capability unavailable in high-frequency inverters of this class, where inrush current frequently exceeds the unit's capacity.
Two independent MPPT trackers (DVM-MPV = Dual Voltage MPPT) allow PV strings with different orientations or under partial shading to operate without cross-string power loss. In off-grid systems with panels mounted on multiple roof faces or on the ground, this translates into measurable gains in daily energy yield.
The MPPT charge controller achieves up to 97.5% efficiency, and the inverter output operates at a power factor of 1.0 - minimizing reactive losses and maximizing active power delivered to loads. By comparison, budget-grade off-grid inverters typically achieve MPPT efficiencies in the 93-95% range.
The series simultaneously supports PV, 48 V battery, grid, and generator inputs with programmable priority. Native compatibility with lithium (LiFePO4), flooded lead-acid, and gel batteries requires no additional integration modules, simplifying system design and reducing BoS costs in off-grid installations.
The series spans models from the SPF 4000T to the SPF 12000T DVM-MPV on a shared hardware and software platform. This streamlines system scaling, standardizes service training, and simplifies spare-parts procurement for installers managing multiple sites.
The low-frequency iron-core transformer causes the SPF 12000T DVM-MPV to weigh approximately 36-40 kg - roughly 2× more than comparable high-frequency inverters (e.g., Victron MultiPlus-II 10 kVA: ~18 kg). Wall installation requires a dedicated mounting structure and at least two technicians, increasing labor costs.
The entire series operates exclusively on a 48 V DC battery bus; no 96 V, 120 V, or 150 V variants are available. At 12 kW with a fully charged battery bank, DC currents exceed 250 A, requiring very short battery cables (recommended length < 1 m) with a cross-section of ≥120 mm² and correspondingly higher-rated DC fuses.
Growatt (founded 2010) does not appear on the current Bloomberg NEF Tier-1 Bankable inverter list, which may complicate project financing through banks or leasing companies and slightly increases the risk of long-term service and parts availability over a 10-15-year off-grid system lifespan, compared to established brands such as SMA, Victron, or Schneider.
About the SPF DVM-MPV series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.