--- title: "Sofar Solar HYD 4000-EP Hybrid Inverter: Specs & Prices | ComparePV" description: "Sofar Solar HYD 4000-EP 4 kW hybrid inverter: 1 shop offer from 1 835 €. Specs: 94.6% European efficiency, 1 MPPT, 600 V max DC input, 21.5 kg." source: "https://comparepv.com/inverter/sofar-solar-hyd-4000-ep" updated: 2026-10-10 --- # Sofar Solar HYD 4000-EP ## Identity - **Manufacturer:** Sofar Solar - **Model:** HYD 4000-EP - **Series:** HYD EP - **Rated AC power:** 4 kW - **Type:** Hybrid - **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 | | --- | --- | --- | --- | --- | --- | | [tab-solar.com](https://comparepv.com/go/99963) | Spain | 1 835 € incl. VAT | 458.75 €/kW | Not stated | Last read 11 Oct 00:44 | ## 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 | 94.6% | 97.2% | Weak - bottom 1% | 246 | | MPPT trackers | 1 | 2 | Weak - bottom 7% | 222 | | Max DC input voltage | 600 V | 600 V | Typical | 94 | | Weight per kW | 5.4 | 3.3 | Weak - bottom 17% | 293 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 4 kW - **Max apparent power:** 4.00 kVA - **Phases:** Single-phase - **Nominal AC voltage:** 230 V - **Max AC current:** 17.4 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 lagging - 0.8 leading - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC input power:** 6.00 kW - **Max DC voltage:** 600 V - **MPPT voltage range:** 90 to 550 V - **Start-up voltage:** 100 V - **MPPT trackers:** 1 - **Max input current per MPPT:** 13.0 A - **Max short-circuit current per MPPT:** 18.0 A ### Efficiency - **European efficiency:** 94.6 % - **Max efficiency:** 97.6 % ### Battery - **Battery port:** Yes - **Battery voltage:** 42–58 Vdc - **Max charge current:** 100.0 A - **Max discharge current:** 100.0 A ### Physical - **Dimensions:** 503 × 482 × 183 mm - **Weight:** 21.5 kg - **Enclosure:** IP65 - **Cooling:** natural - **Operating temperature:** -30 to 60 °C - **Max humidity:** 95 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Wi-Fi, Display - **Protocols:** CAN, RS485, Wi-Fi, 4G (optional), LAN (optional) - **Protection:** DC switch, Surge protection ### Pros - **EPS Switchover \<10 ms - Protection for Sensitive Loads** - The Emergency Power Supply switchover time is \<10 ms (per the HYD 3000-6000-EP datasheet), which meets the requirements for Class III UPS per IEC 62040-3. By comparison, entry-level hybrid inverters such as the Growatt SPH offer EPS switchover times of 20-30 ms, which can be problematic for refrigerators, compressors, and IT equipment. - **European Efficiency of 97.7% - Above Segment Median** - A European efficiency of 97.7% (peak 98.2%) positions the HYD EP series above the median for single-phase hybrid inverters in the 3-6 kW class, where typical values range from 96.5% to 97.5%. In climates with a high proportion of partial-load operating hours, this translates into a measurably higher annual energy yield. - **Wide Battery Voltage Range (90-580 V) with LV Support** - A DC battery voltage range of 90-580 V with charge/discharge currents up to 100 A supports both low-voltage (LV) batteries (e.g., GTX 2500/5000 at 48 V) and HV configurations. Parallel connection of up to 4 battery strings allows capacity to be scaled without replacing the inverter - a significant advantage when future system expansion is planned. - **IP65 Enclosure with Passive Cooling up to ~50°C** - The IP65-rated enclosure permits outdoor installation, and the fanless design at operating temperatures up to ~50°C eliminates the typical issues associated with acoustic noise and mechanical wear. Compared to actively cooled models such as the Huawei SUN2000-6KTL-L1, this results in lower long-term failure rates and silent operation for the majority of the year. - **Dual Independent MPPTs with 1.5× DC Oversizing Capability** - Two independent MPPT channels with a permissible DC oversizing ratio of 1.5× (up to 9 kWp on the 6 kW model) allow arrays with modules on multiple roof faces - at varying azimuths and tilt angles - to be designed without mismatch losses. This is particularly relevant in urban installations where a true south-facing orientation is rarely achievable. ### Cons - **Standby Power Consumption up to 15 W** - The technical documentation specifies a standby power draw of up to 15 W, which amounts to approximately 131 kWh of self-consumption losses per year. Competing products such as the Fronius GEN24 Plus (~6 W) and the SolarEdge Home Hub (~4 W) produce 2-3× lower standby losses - a meaningful difference in systems with low nighttime consumption. - **Output Limited to 6 kW (Single-Phase Only)** - The HYD EP series covers only the 3-6 kW range in a single-phase topology. Homes with demand exceeding 6 kW, or installations requiring phase-load balancing, must migrate to a different series (e.g., HYD-3PH), which necessitates a full system redesign and potential hardware replacement. There is no upgrade path within the same product series. ## About this series The Sofar Solar HYD EP series is **single-phase hybrid inverters**, combining grid-connected operation with emergency backup mode. This means you can maintain selected circuits during a grid failure, while also flexibly managing self-consumption at home or for a small business. The devices feature the **EPS function** with extremely fast switching, along with a robust enclosure with IP65 rating, making outdoor installation straightforward. Two independent **MPPTs** simplify designing systems with panels across different roof sections and improve energy yield under partial shading. The high European efficiency translates to significantly better performance in typical Polish climatic conditions. Monitoring is available via the portal and app - standard with a WiFi-stick, and communication also includes Ethernet/RS485. The series is **compatible with energy storage systems** (including low-voltage options) and operates in multiple modes, including export limitation. It meets popular grid and safety standards and offers a 5-year warranty with the option to extend. ## Questions ### How quickly does the Sofar Solar HYD EP inverter switch to EPS mode during a power outage? Sofar Solar HYD EP inverters transition to EPS (Emergency Power Supply) mode in less than 10 ms from the moment grid voltage is lost. This switchover is fast enough that sensitive electronic devices such as routers and computers will not shut down during the transition. EPS mode enables the inverter to supply power to dedicated backup circuits from a charged energy storage system for a duration that depends on battery capacity and current consumption. ### Which energy storage systems are compatible with the Sofar Solar HYD EP inverter? The HYD EP series is compatible with low-voltage (LV) battery systems, including Sofar GTX 5000-Pro modules, which can be connected in parallel to achieve a total capacity of approximately 20 kWh. The inverter supports multiple battery operating modes - self-consumption, Time of Use (ToU), scheduled, and passive - allowing the charging strategy to be tailored to electricity tariff structures or seasonal generation conditions. ### What is the European efficiency of the Sofar Solar HYD EP inverter and why does it matter? The European efficiency of the HYD EP series ranges from 97.2% to 97.3%, with a peak efficiency of 98%. European efficiency is a weighted average calculated across multiple partial-load operating points, making it a more accurate predictor of real-world performance in climates such as Poland's, where the inverter rarely operates at full rated power. A high European efficiency value translates directly into lower annual conversion losses and a measurably higher energy yield from the installation. ### Can the Sofar Solar HYD EP inverter be installed outdoors? Yes, the HYD EP series enclosure is rated IP65, providing full protection against dust ingress and water jets from any direction. Wall mounting on the exterior of a garage, carport, or building facade is permitted. However, the installation location should be shaded during summer months, as elevated ambient temperatures may cause the inverter to derate output power through thermal regulation. ### How does monitoring work on the Sofar Solar HYD EP inverter, and is a WiFi stick included in the package? The HYD EP series ships as standard with a WiFi stick, which simply needs to be plugged into the inverter's USB port and paired with the local wireless network. Generation data, battery state of charge, and consumption figures are available in real time via the SolarmanPV web portal and its companion mobile application. The inverter also supports Ethernet, RS485, and CAN 2.0 interfaces, enabling integration with building management systems (BMS) or installer-level monitoring platforms. ### What warranty is provided for the Sofar Solar HYD EP inverter, and can it be extended? The standard manufacturer's warranty for the HYD EP series is 5 years. Sofar Solar offers extended warranty options covering 10, 15, or 20 years - a significant consideration given the typical planned service life of a photovoltaic installation spanning well over a decade. It is advisable to register the unit with the authorized distributor promptly after commissioning to ensure full warranty terms are activated. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/hyd-3000-6000-ep-datasheet-2023-09-19-v5-1-en-eu-60cb518f018d.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [SolarEdge SE4000H](https://comparepv.com/inverter/solaredge-se4000h) | 4 kW | 99.0% | | 12.0 kg | +4.4 pp efficiency, 9.5 kg lighter | | [Huawei SUN2000L-4KTL](https://comparepv.com/inverter/huawei-sun2000l-4ktl) | 4 kW | 97.9% | 2 | 10.6 kg | +3.3 pp efficiency, +1 MPPT, 10.9 kg lighter | | [Growatt MOD 4000TL3-HU](https://comparepv.com/inverter/growatt-mod-4000tl3-hu) | 4 kW | 97.8% | 2 | 19.0 kg | +3.2 pp efficiency, +1 MPPT, 2.5 kg lighter | | [Growatt SPM 4000TL-HU](https://comparepv.com/inverter/growatt-spm-4000tl-hu) | 4 kW | 97.6% | 2 | 26.0 kg | +3.0 pp efficiency, +1 MPPT, 4.5 kg heavier | | [Growatt MOD 4000TL3-XH](https://comparepv.com/inverter/growatt-mod-4000tl3-xh) | 4 kW | 97.5% | 2 | 12.5 kg | +2.9 pp efficiency, +1 MPPT, 9.0 kg lighter | | [Huawei SUN2000-4KTL-L1](https://comparepv.com/inverter/huawei-sun2000-4ktl-l1) | 4 kW | 97.5% | 2 | 12.0 kg | +2.9 pp efficiency, +1 MPPT, 9.5 kg lighter | | [SolarEdge SE7K (Three Phase, Delta Grids)](https://comparepv.com/inverter/solaredge-se7k-three-phase-delta-grids) | 4 kW | 97.3% | | 16.4 kg | +2.7 pp efficiency, 5.1 kg lighter | | [SolarEdge SE4K](https://comparepv.com/inverter/solaredge-se4k) | 4 kW | 97.3% | | 16.4 kg | +2.7 pp efficiency, 5.1 kg lighter | --- Source: https://comparepv.com/inverter/sofar-solar-hyd-4000-ep