--- title: "SOFAR 1.1KTL2-G3 Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "SOFAR 1.1KTL2-G3 1.1 kW grid-tie inverter. Specs: 96.7% European efficiency, 1 MPPT, 550 V max DC input, 6.0 kg." source: "https://comparepv.com/inverter/sofar-solar-sofar-1-1ktl2-g3" updated: 2026-01-16 --- # SOFAR 1.1KTL2-G3 ## Identity - **Manufacturer:** Sofar Solar - **Model:** SOFAR 1.1KTL2-G3 - **Series:** SOFAR 1~4KTL2-G3 - **Rated AC power:** 1.1 kW - **Type:** Grid-tie - **Phases:** Single-phase ## How it compares Compared against 164 inverters up to 3 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | 96.7% | 97.0% | Typical | 72 | | MPPT trackers | 1 | 1 | Typical | 43 | | Max DC input voltage | 550 V | 550 V | Typical | 41 | | Weight per kW | 5.5 | 4.0 | Typical | 118 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 1.1 kW - **Max apparent power:** 1.10 kVA - **Phases:** Single-phase - **Nominal AC voltage:** 230 V - **Max AC current:** 7.7 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 leading – 0.8 lagging - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC voltage:** 550 V - **MPPT voltage range:** 50 to 550 V - **Start-up voltage:** 70 V - **MPPT trackers:** 1 - **Max input current per MPPT:** 15.0 A - **Max short-circuit current per MPPT:** 20.0 A ### Efficiency - **European efficiency:** 96.7 % - **Max efficiency:** 97.3 % ### Physical - **Dimensions:** 260 × 303 × 118 mm - **Weight:** 6.0 kg - **Enclosure:** IP65 - **Cooling:** natural - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 2000 m ### Connectivity and protection - **Interfaces:** Wi-Fi, Display - **Protocols:** RS485, Wi-Fi - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** IEC 62109-1/-2, IEC/EN 61000-6-1/-3, IEC/EN 61000-3-2/-3/-11/-12, IEC 61727, IEC 62116, IEC 60068, IEC 61683 ### Pros - **2 independent MPPTs in the 1-4 kW class** - Having two independent maximum power point trackers in a single-phase inverter of this power class is a differentiator - most direct competitors (e.g., Growatt MIN 1-3KTL-X, older Goodwe series) offer only 1 MPPT in the sub-3 kW range. This enables efficient management of two roof faces with different orientations (e.g., east-west) or partially shaded strings without the need for power optimizers. - **DC oversizing ratio up to 140%** - The allowable DC oversizing up to 140% (PV array power may be up to 1.4× the inverter's rated AC output) enables better harvest during low-irradiance conditions - typical of morning and evening hours in the Polish climate - without risk of permanent device overload. The manufacturer's datasheet (v2.2, 2023-11-30) confirms this parameter for the entire series. - **Peak efficiency 97.7% and IP65 rating** - A peak efficiency of 97.7% places this series in the top quartile among budget-class single-phase grid-tied inverters. The IP65 enclosure allows direct outdoor installation (wall or roof mounting), eliminating the need for an additional protective enclosure and simplifying system design. - **Low weight: 6-7.3 kg** - The weight range of 6.0-7.3 kg (depending on the power variant) facilitates single-person installation on a facade or roof. For comparison, the Fronius Primo 3.0 weighs approximately 10.9 kg and the SMA Sunny Boy 3.0 approximately 10.5 kg. The lower mass reduces labor costs in volume installations. - **10-year warranty + local support in Poland** - The standard factory warranty is 10 years (120 months from purchase), with optional extension to 15 or 20 years. Sofar Solar maintains an office and training center in Poland, provides warranty documentation in Polish, and operates a dedicated European service hotline (sofarsolar.eu), reducing logistical risk in warranty claims. ### Cons - **WiFi/Ethernet module sold separately** - In the KTL2-G3 series, the WiFi and Ethernet communication module is not included as standard - it is a separate accessory with an additional purchase and installation cost. The competing Huawei SUN2000-L1 (1-6 kW) bundles a WiFi dongle with every unit at list price, which lowers the total monitoring system cost in large-scale prosumer installations. ## About this series Sofar Solar's SOFAR 1~4KTL2-G3 series are **single-phase grid-tie inverters** designed for small and medium PV installations where reliable operation, fast installation, and resistance to external conditions are key. What sets them apart is the **DC oversizing capability**, allowing the installation to better utilize weaker sunlight conditions without losing control over the inverter's operation. The enclosure features a protection class suitable for outdoor mounting, and refined protections enhance reliability in daily operation. A major advantage is the **2 independent MPPTs** in this power class - enabling efficient management of two strings of panels with different orientations (e.g., east-west) or partially shaded sections, genuinely improving energy yields. High **European efficiency** means better energy production under the typical, variable weather conditions in Poland, not just in ideal operating conditions. Monitoring can be done via RS485, WiFi, or Ethernet modules, usually with a view in the application. This is a series for demanding residential and small commercial installations; it is not a hybrid inverter, so it is not intended for direct operation with energy storage. ## Questions ### Is the SOFAR 1~4KTL2-G3 inverter suitable for east-west roof installations? Yes, the KTL2-G3 series features 2 independent MPPT inputs, allowing two separate strings of panels oriented in different directions - for example, east and west - to be connected simultaneously. Each string operates at its own maximum power point, enabling the system to generate energy in the morning and afternoon rather than only at solar noon. This is a genuine advantage in the sub-4 kW power class, where dual MPPT is by no means a standard feature. ### What warranty does the SOFAR 1~4KTL2-G3 inverter carry? Sofar Solar provides a standard manufacturer's warranty of 10 years on inverters in the G3 series. Some authorized distributors in Poland offer the option to extend this coverage to 20 years for an additional fee. It is advisable to verify the specific terms with your retailer, as certain distributors include the extended warranty in the purchase price at no extra charge. ### What does DC-side oversizing mean for the SOFAR 1~4KTL2-G3 series, and is it worth applying? The KTL2-G3 series supports a DC input power that can exceed the inverter's rated AC output by up to 140% of the nominal value. This means that a 3 kW inverter can accommodate up to approximately 4.2 kW of installed panel capacity. As a result, the device operates closer to its full rated power during sunrise, sunset, and overcast conditions when irradiance is lower, improving annual energy yields without any risk of damage to the inverter. ### Can the SOFAR 1~4KTL2-G3 inverter be installed outdoors? Yes, the KTL2-G3 series enclosure carries an IP65 ingress protection rating, meaning it is fully dust-tight and protected against water jets from any direction. The inverter can therefore be mounted directly on an exterior building wall, in a garage, or inside an outdoor enclosure. Care should be taken to avoid prolonged direct sunlight on the unit's housing to prevent thermal overload during summer months. ### How can the SOFAR 1~4KTL2-G3 inverter be monitored in real time? The inverter natively supports RS485 communication and is compatible with an optional Wi-Fi or Ethernet module. Once paired with the SolarmanPV mobile app or the Sofar Solar cloud platform, users can track real-time generation, historical production data, and active alarms directly from a smartphone. For installers, RS485 data readout is available for integration with local energy management systems. ### Is the SOFAR 1~4KTL2-G3 inverter compatible with energy storage? No, the KTL2-G3 series is a grid-tie inverter, not a hybrid unit. It does not include a dedicated DC battery input or battery management logic (BMS integration). Direct coupling with an energy storage system is not possible. If a battery-backed installation is planned, a hybrid inverter from Sofar Solar's lineup is required - for example, a unit from the HYD series, or the SOFAR ME3000SP operating as an AC-coupled storage module. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/1708417587861046361-0b2ededd4027.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [SOFAR 1100TL-G3](https://comparepv.com/inverter/sofar-solar-sofar-1100tl-g3) | 1.1 kW | 96.9% | 1 | 5.5 kg | Similar on paper | | [Growatt 1000-S](https://comparepv.com/inverter/growatt-growatt-1000-s) | 1 kW | 96.5% | 1 | 6.4 kg | -0.1 kW | | [Growatt MIC 1000TL-X](https://comparepv.com/inverter/growatt-mic-1000tl-x) | 1 kW | 96.5% | 1 | 6.0 kg | -0.1 kW | | [Growatt MIC 1000TL-X2 (Pro)](https://comparepv.com/inverter/growatt-mic-1000tl-x2-pro) | 1 kW | 96.5% | 1 | 6.0 kg | -0.1 kW | | [Growatt MIC 1000TL-X2](https://comparepv.com/inverter/growatt-mic-1000tl-x2) | 1 kW | 96.5% | 1 | 6.0 kg | -0.1 kW | | [GoodWe GW1000-XS](https://comparepv.com/inverter/goodwe-gw1000-xs) | 1 kW | 96.4% | 1 | 5.8 kg | -0.1 kW | | [SolarEdge SE1000M (aka M1000SE)](https://comparepv.com/inverter/solaredge-se1000m-aka-m1000se) | 1 kW | 95.7% | | 6.0 kg | -0.1 kW, -1.0 pp efficiency | | [Ginlong Solis S6-GR1P1K-M](https://comparepv.com/inverter/ginlong-solis-s6-gr1p1k-m) | 1 kW | 95.4% | 1 | 7.7 kg | -0.1 kW, -1.3 pp efficiency, 1.7 kg heavier | --- Source: https://comparepv.com/inverter/sofar-solar-sofar-1-1ktl2-g3