--- title: "Growatt SPF 3500 ES Off-grid Inverter: Specs & Prices | ComparePV" description: "Growatt SPF 3500 ES 3.5 kW off-grid inverter: 1 shop offer from 9 909.09 Kč. Specs: 1 MPPT, 450 V max DC input, 11.5 kg." source: "https://comparepv.com/inverter/growatt-spf-3500-es" updated: 2026-10-11 --- # Growatt SPF 3500 ES ## Identity - **Manufacturer:** Growatt - **Model:** SPF 3500 ES - **Series:** SPF - **Rated AC power:** 3.5 kW - **Type:** Off-grid - **Phases:** Single-phase - **Battery port:** yes ## Price offers Prices are the figure each shop printed, on that shop's side of VAT. | Shop | Market | Price | Per kW | Availability | Last read | | --- | --- | --- | --- | --- | --- | | [www.battery-import.cz](https://comparepv.com/go/16621) | Czechia | 9 909.09 Kč net | 2 831.17 Kč/kW | In stock | Last read 11 Oct 03:00 | ## How it compares Compared against 362 inverters from 3 to 6 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | - | 97.2% | | | | MPPT trackers | 1 | 2 | Weak - bottom 7% | 222 | | Max DC input voltage | 450 V | 600 V | Weak - bottom 6% | 299 | | Weight per kW | 3.3 | 3.3 | Typical | 181 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 3.5 kW - **Max apparent power:** 3.50 kVA - **Phases:** Single-phase - **Nominal AC voltage:** 230 V ### PV input - **Max DC input power:** 4.50 kW - **Max DC voltage:** 450 V - **MPPT voltage range:** 120 to 430 V - **MPPT trackers:** 1 ### Efficiency - **Max efficiency:** 93.0 % ### Battery - **Battery port:** Yes - **Battery voltage:** 48VDC - **Grid-forming:** Yes ### Physical - **Dimensions:** 485 × 330 × 135 mm - **Weight:** 11.5 kg - **Enclosure:** IP20 - **Operating temperature:** 0 to 55 °C - **Max humidity:** 95 % - **Max altitude:** 2000 m - **Installation:** Indoor only ### Connectivity and protection - **Interfaces:** Display ### Pros - **A comprehensive, all-in-one solution** - 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). - **Scalability through parallel processing** - 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. - **High efficiency of the MPPT (up to 97.9%)** - 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. - **Wide compatibility with batteries** - 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. - **Warranty of up to 10 years in Europe + 24/7 support** - 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. ### Cons - **Not classified as a Tier-1 bankable company (BNEF)** - 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 AC SPF 6000 ES+ has a 93% efficiency.** - 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. - **Issues with the ShinePhone application** - 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. ## About this series 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. ## Questions ### Do Growatt SPF inverters operate without a grid connection? Yes, the Growatt SPF series consists of inverters designed exclusively for off-grid operation, functioning entirely independently of the utility grid. Each unit integrates a pure sine wave inverter and an MPPT charge controller in a single enclosure, enabling standalone power supply for homes, vacation cabins, workshops, or small commercial facilities with no grid connection required. The SPF series therefore represents a complete, self-contained solution for island (off-grid) installations. ### Which battery types are compatible with Growatt SPF inverters? Growatt SPF inverters support both conventional lead-acid and gel batteries as well as modern lithium-based batteries, including 48V LiFePO4 packs. The inverter allows configuration of energy source priorities as well as charge and discharge schedules, enabling the system to be tailored to the specific battery technology in use and helping to maximize battery service life. ### How many Growatt SPF inverters can be connected in parallel, and what is the maximum combined output power? Up to 6 Growatt SPF units can be connected in parallel, yielding a total system output of up to 30 kW. This makes the SPF series highly scalable: an installation can begin with a single inverter and be expanded incrementally as energy demand grows, without the need to replace existing equipment. ### What is the warranty coverage for Growatt SPF series inverters? Growatt SPF inverters are covered by a standard 2-year manufacturer's warranty. When purchased through an authorized Polish distributor, the warranty is fulfilled by the official Growatt service center in Poland, which handles repairs or unit replacements including complimentary courier pick-up and return delivery in the event of a defect. It is advisable to verify the specific warranty terms with the retailer at the point of purchase. ### Is the Growatt SPF inverter suitable for a vacation cabin with no utility grid connection? Yes, the Growatt SPF series is one of the most popular choices for seasonal and year-round vacation cabins as well as other off-grid facilities. The built-in MPPT charge controller efficiently charges the battery bank from PV panels even under variable irradiance or partial shading conditions, while the pure sine wave output ensures safe, stable power delivery for sensitive household appliances, white goods, and consumer electronics. ### Can Growatt SPF inverters be connected to remote monitoring via Wi-Fi? Yes, the Growatt SPF series supports remote monitoring via Wi-Fi or GPRS through the Growatt monitoring platform. The Wi-Fi module provides real-time visibility into energy production, battery state of charge, and inverter operating parameters through either a mobile application or a web browser. This capability is particularly valuable for installations at recreational properties or remote sites located far from the system owner's primary residence. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/SPF-3000-5000-ES-Datasheet-32f7cbe5b676.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Easun Power ISolar SMR II 3.5KW](https://comparepv.com/inverter/easun-power-isolar-smr-ii-3-5kw) | 3.5 kW | | | 11.5 kg | Similar on paper | | [Easun Power ISolar MLV 3.5KW-U](https://comparepv.com/inverter/easun-power-isolar-mlv-3-5kw-u) | 3.5 kW | | | 10.0 kg | 1.5 kg lighter | | [Easun Power LSOLAR SML-II-3.6KW](https://comparepv.com/inverter/easun-power-lsolar-sml-ii-3-6kw) | 3.6 kW | | 1 | 11.0 kg | +0.1 kW | | [Easun Power ISolar SMV IV 3600-24](https://comparepv.com/inverter/easun-power-isolar-smv-iv-3600-24) | 3.6 kW | | | 9.0 kg | +0.1 kW, 2.5 kg lighter | | [Easun Power ISolar SMG II 3.6KW](https://comparepv.com/inverter/easun-power-isolar-smg-ii-3-6kw) | 3.6 kW | | | 9.0 kg | +0.1 kW, 2.5 kg lighter | | [Easun Power ISolar-SMX-II-3.6KW](https://comparepv.com/inverter/easun-power-isolar-smx-ii-3-6kw) | 3.6 kW | | 1 | 6.9 kg | +0.1 kW, 4.6 kg lighter | | [SMA Solar SI4.4M-13](https://comparepv.com/inverter/sma-solar-si4-4m-13) | 3.3 kW | | | 44.0 kg | -0.2 kW, 32.5 kg heavier | | [Easun Power ISolar SPL 4K](https://comparepv.com/inverter/easun-power-isolar-spl-4k) | 3.2 kW | | | 9.8 kg | -0.3 kW, 1.7 kg lighter | --- Source: https://comparepv.com/inverter/growatt-spf-3500-es