Skip to main content
Sofar Solar SOFAR 24KTLX-G3
Sofar Solar

SOFAR 24KTLX-G3

24 kW Grid-tie Three-phase
Compare with closest alternative Datasheet PDF
Rated AC (kW)
24.00
Typical for its class
Euro eff. (%)
98.2
Typical · median 98.0%
MPPT
2
Typical · median 2
Max DC (V)
1100
Strong · top 21%
Weight (kg)
23.0
Strong · 12.0 kg below median
Warranty (yrs)
-
Not published

The SOFAR Solar SOFAR 15-24KTLX-G3 series are three-phase grid-tie inverters designed for small industrial and commercial installations, where stable operation, high operational reliability, and easy monitoring are key. These inverters feature two independent MPPTs - a practical solution when modules are distributed across two roof sections or operate under different sunlight conditions, as the inverter precisely selects the operating point, reducing losses during partial shading.

In daily operation, high European efficiency is crucial, meaning significantly better energy yields under typical operating conditions in Poland, not just in a laboratory setting. The series also includes Type II overvoltage protection on both the DC and AC sides, enhancing the installation's resilience to storms and grid fluctuations.

The comprehensive monitoring and remote software updates simplify management and maintenance, facilitating service. This is an excellent choice for investors seeking efficient inverters for commercial or business installations without complicating the system with energy storage.

Ranking

227 inverters from 12 to 30 kW
Metric This inverter Median Position in class Rank in class
European efficiency 98.2% 98.0% Typical 36
MPPT trackers 2 2 Typical 53
Max DC input voltage 1100 V 1000 V Strong · top 21% 1
Weight per kW 1.0 1.6 Strong · top 8% 19
Warranty - 5 yrs Not published -
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Price offers

3 from shops we track
Shop Country Price Per kW Stock Offer updated
7Sun Poland 4 841.27 zł incl. VAT 201.72 zł/kW In stock yesterday Visit shop
Sklep Soltech Poland 4 119.24 zł net 171.63 zł/kW Not stated 23h ago Visit shop
ensun.sk Slovakia 1 291.78 € incl. VAT 53.82 €/kW In stock 12h ago Visit shop

Specifications

Open datasheet PDF
Rated AC power 24 kW Continuous output
Max apparent power 26.40 kVA
Phases Three-phase
Nominal AC voltage 400 V 310Vac-480Vac
Max AC current 38.3 A
Grid frequency 50 Hz Range 45Hz-55Hz/55Hz-65Hz
Power factor 1 (adjustable +/-0.8)
Harmonic distortion (THD) 3.0 %
Max DC voltage 1100 V Caps the string length
MPPT voltage range 140 to 1000 V
Start-up voltage 160 V
MPPT trackers 2 1 string each
Max input current per MPPT 26.0 A Must exceed the panel's Imp
Max short-circuit current per MPPT 36.0 A Must exceed the panel's Isc
European efficiency 98.2 % Weighted across part loads
Max efficiency 98.6 % Best single operating point
Dimensions 430 × 520 × 198 mm Height × width × depth
Weight 23.0 kg 1.0 kg per kW
Enclosure IP65
Cooling forced-air
Operating temperature -30 to 60 °C
Max humidity 100 %
Max altitude 4000 m
Interfaces Wi-FiBluetoothDisplay
Protocols RS485Wi-FiBluetooth (App)
Protection DC switchSurge protection
Certifications IEC/EN 61000-6-1/3IEC/EN 61000-3-11/12IEC 62116IEC 61727IEC 61683IEC 60068-1/2/14/30IEC/EN 62109-1/2G99VDE-AR-N 4105VDE V 0126-1-1EN 50549-1NRS 097-2-1

Pros and cons

5 positive · 2 caution
What owners get
Peak efficiency of 98.75% - premium class

The rated peak efficiency of 98.75% (per Sofar Solar/Krannich datasheet) positions this series alongside the Fronius Symo Gen24 (98.5%) and Huawei SUN2000-20KTL (98.6%). On a 20 kW system with an annual yield of 1,100 kWh/kWp, this translates to a real gain of several hundred kWh per year compared to inverters rated at 97.5-98.0% efficiency.

DC voltage up to 1,100 V with 4 string inputs

Two independent MPPTs with a maximum input voltage of 1,100 V and an operating range of 140-1,000 V allow long strings to be built using modern 500+ Wp modules (e.g., 22 modules × 500 Wp = 1,050 V Voc at 0 °C), reducing cable runs, connectors, and overall BoS costs.

Integrated Type II SPD protection - DC and AC

Built-in Type II surge protective devices on both the DC and AC sides (per PVO International datasheet) eliminate the need for separate surge protection equipment costing PLN 200-400, which remains an add-on requirement for lower-cost competing inverters.

Fanless cooling - zero moving parts

Passive natural convection cooling eliminates fan failures (the most common fault mode in SME-class inverters), ensures silent operation, and allows indoor installation in office or commercial buildings without the need for acoustic enclosures.

5 power variants (15/17/20/22/24 kW)

2-3 kW power steps enable precise inverter sizing to the DC array without over-specification - for example, a 21 kWp system can be matched with the 22KTLX-G3 instead of paying a premium for a competitor's 25 kW model. The resulting DC/AC ratio of 1.05-1.15 remains optimal for Polish climatic conditions.

Trade-offs
Standard warranty limited to 5 years

The factory warranty covers 5 years (SolarTraders, Sofar official website). The Huawei SUN2000 in the same power class offers 10 years as standard across most European markets. Extension to 10 years is available in Poland through selected distributors, but at an additional cost - a significant consideration when calculating TCO for a commercial installation over a 15-20 year horizon.

Reported issues with the mobile application

The Polish trade forum elektroda.pl and industry portals (fotowoltaika-energia.pl, 2024-2025) document recurring complaints about the SolarView/SolarmanPV app - including intermittent data refresh failures and Wi-Fi stick configuration issues. Installers consistently rate FusionSolar (Huawei) and MyFronius as more mature and reliable platforms.

Inverter Power Euro eff. MPPT Weight Difference
Sofar Solar SOFAR 24KTLX-G3 24 kW 98.2% 2 23.0 kg You are here
Fronius Symo Advanced 24.0-3 480 24 kW - 2 43.4 kg 20.4 kg heavier
Fronius Symo 24.0-3 480 24 kW - - 43.4 kg 20.4 kg heavier
MID 25KTL3-X2 (Pro.E) 25 kW 98.6% 3 24.0 kg +1.0 kW, +0.4 pp efficiency, +1 MPPT
MID 25KTL3-X 25 kW 98.6% 2 23.0 kg +1.0 kW, +0.4 pp efficiency
MID 25KTL3-X1 25 kW 98.5% - 29.5 kg +1.0 kW, 6.5 kg heavier
GW25K-MT 25 kW 98.4% - 40.0 kg +1.0 kW, 17.0 kg heavier
Fronius Verto 25.0 400 25 kW 98.3% 4 35.2 kg +1.0 kW, +2 MPPT, 12.2 kg heavier
SG23T-P2-CN 23 kW 98.3% 2 19.0 kg -1.0 kW, 4.0 kg lighter

About the SOFAR 15-24KTLX-G3 series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this model's own.

What warranty does Sofar Solar offer on the SOFAR 15-24KTLX-G3 series?
The standard warranty for inverters in the SOFAR 15-24KTLX-G3 series is 5 years. The manufacturer offers the option to purchase an extended warranty of up to 10 years, and in certain contractual arrangements up to 20 years. For commercial installations, securing extended coverage is highly advisable, as the inverter is the heart of the PV system and any failure results in the entire installation going offline.
What power ratings are available in the SOFAR 15-24KTLX-G3 series, and how do I choose the right one?
The series covers five power variants: 15, 17, 20, 22, and 24 kW. The choice depends primarily on the total installed panel capacity and the projected energy consumption of the facility. For a small manufacturing plant or office building with a system up to 80-100 kWp, a single 20-24 kW inverter is typically sufficient. It is advisable to consult a system designer to avoid oversizing or encountering grid connection limitations.
What is the purpose of the two independent MPPTs in the SOFAR 15-24KTLX-G3, and when does it matter?
Two independent MPPTs allow panels from two different roof sections or with different orientations (e.g., east-west) to be connected without mutual energy losses. Each tracker independently seeks its own optimal operating point, so shading on one string of panels does not reduce the output of the other. In practice, this translates into higher annual energy yields compared to a single-MPPT inverter.
Are the SOFAR 15-24KTLX-G3 inverters compatible with modern 500 W and higher-power panels?
Yes, the SOFAR 15-24KTLX-G3 series is designed to work with high-power modules rated at 500 W and above. Each MPPT tracker supports a maximum input current of 20 A, which accommodates the electrical parameters of the vast majority of large-format modules currently available on the market. The maximum DC input voltage is 1100 V, providing considerable flexibility when designing PV string configurations.
How does monitoring work with the SOFAR 15-24KTLX-G3 inverter, and do I need an additional device?
The inverter features a built-in Wi-Fi module that transmits data to the SolarmanPV platform. Simply connect it to the local home or business network, register the installation on the portal, and you will have access to production data via the mobile app or a web browser. Inverter firmware updates can also be performed remotely, eliminating the need for an on-site service visit.
Does the SOFAR 15-24KTLX-G3 series operate in winter and at low temperatures?
Yes, the operating temperature range is -30°C to +60°C, meaning the inverter starts up and operates reliably under typical Central European winter conditions. The IP65-rated enclosure protects against moisture and dust ingress, which is important for outdoor installations or unheated technical rooms. The high European efficiency of 98.2% also means the inverter performs well under the low-irradiance conditions characteristic of autumn and winter.
Compare with alternative