Growatt SPF 6000T DVM-G2 is a low-frequency off-grid inverter with an integrated transformer, designed for reliable power where stability and resilience to demanding loads are crucial, such as pumps, motors, and equipment with high surge currents. This is an excellent choice for off-grid homes, recreational facilities, farms, and backup power installations, where energy sources can include PV, batteries, the grid, or a generator.
In practice, you get 2 independent MPPTs, which simplifies the design of systems in shaded conditions or with different roof orientations-each string operates closer to its maximum potential. High efficiency in typical European conditions means less losses in daily operation and more predictable energy production during transitional seasons.
A plus is also remote monitoring via WiFi or GPRS and service tools for local activation. The devices work with energy storage systems (including lithium and lead-acid types) and allow system expansion through parallel operation. Complete documentation, certificates, and warranty terms are available, depending on distribution.
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Specifications
Pros and cons
The built-in low-frequency transformer wound with pure copper delivers an 18 kVA surge for 10 ms and twice the rated continuous power for extended periods. This enables direct support of motors, pumps, and compressors with high inrush currents without oversizing the inverter - a technological advantage that high-frequency inverters in the same price class cannot replicate.
The full 6,000 W is delivered to the load regardless of its inductive character. The manufacturer rates output PF at 1.0, eliminating the hidden internal losses inherent to off-grid inverters with PF = 0.8, which effectively cap usable real power at approximately 4.8 kW at the same apparent-power rating.
The series supports paralleling up to 6 units, allowing an off-grid system to scale to 36 kW without replacing the central component. By comparison, the SMA Sunny Island - a leading competitor in this class - requires dedicated communication hardware to parallelize even two units.
The inverter simultaneously accepts PV (up to 250 V DC), a 48 V battery bank (Li-ion and PbA), an AC grid connection, and a diesel generator, with automatic source prioritization. Compatibility with both battery chemistries - lithium-ion and lead-acid - increases storage configuration flexibility and lowers the investment entry threshold.
The integrated Wi-Fi/GPRS communication module enables direct integration with the Growatt ShinePhone platform without an additional datalogger. This allows real-time remote monitoring of system parameters and over-the-air firmware updates, reducing on-site service costs.
The IP20 ingress protection rating precludes outdoor installation or placement in damp environments without an additional sealed enclosure. Competing hybrid inverters in this class - such as the Victron Quattro and Sol-Ark 12K - offer IP21 to IP65 ratings, which represents a significant design constraint in temperate climates with high seasonal humidity.
The low-frequency transformer raises the unit weight to 38.5 kg, compared to approximately 17-20 kg for high-frequency inverters of equivalent power (e.g., Deye SUN-6K-SG03LP1). Installation requires at least a two-person crew and a robust mounting structure, adding to overall BoS costs.
The rated peak efficiency of 93-94% is lower than that of leading high-frequency inverters (e.g., Fronius Symo GEN24: 98%, SolarEdge StorEdge: 97.6%). In a typical 6 kW system operating 2,000 hours per year, a 3-4 percentage-point efficiency gap translates to a real annual energy loss of approximately 360-480 kWh.
Growatt does not appear on the BloombergNEF bankable inverter manufacturers list, which may complicate access to non-recourse project financing and narrows the pool of institutional investors willing to accept the equipment as collateral. For commercial installations, additional brand justification may be required by insurers and lenders.
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About the SPF 6000T DVM-G2 series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.