Why choose us?
Choosing the right product is only half the equation. Choosing the right partner ensures your project's success from conception to long-term operation. Here's why industry leaders trust us:

Deep Technical Expertise & Consultative Approach:
Our engineers are not only installers but also energy consultants. We take the time to understand your specific load profile, site restrictions, business goals, etc. We comprehensively utilize our knowledge of the Solis 255K PLUS Inverter to develop an overall solution to maximize your financial return and operation resiliency. We don't just sell boxes; we deliver optimized energy networks.
Global Reach, Local Support:
Operating across world, through the combination of our international experience and locally based teams, you can receive fast product delivery time, expert installation, and ongoing service and support whether you are placing a plant in the middle of a busy city or a remote industrial area.


End-to-End Project Management Excellence:
We have implemented a proven methodology to effectively manage your project, including all stages from site evaluation, system design, and procurement to logistics, professional installation, commission, and all related documentation. It minimizes your financial risk, delay, and ensures that your project will be completed on-time and within budget so that you can continue focusing on your business.
Comprehensive Training & Empowerment:
A powerful system requires knowledgeable operators. We provide thorough training sessions for your technical staff on system operation, monitoring platform usage, interpreting performance data, and performing basic troubleshooting. Empower your team to maximize the benefits of your new solar asset.

Products Description
What are advantages of Solis 255K Hybrid Inverter?

Unrivaled Grid Interaction & Stability:
Navigate complex grid environments with confidence. The PLUS platform utilizes advanced algorithms to ensure the stability of the power grid during changing conditions and to provide a higher level of power quality. The PLUS provides not only new opportunities for generating electricity but also opportunities to be a valuable and secure contributor to the power grid.
Intelligent Energy Orchestration:
Think of the PLUS unit as the brain of your solar system. With a new and improved advanced controllingLogic feature, you are able to increase your self-use of the energy your solar energy system creates while utilizing battery storage management to its fullest potential. This system allows you to participate in demand response programs and transform your solar generation asset into an active revenue generating machine as part of your overall energy strategy. Thus, your return on investment will be maximized by ensuring that you consume the electricity generated by your solar system at the time it has the most value to you from a financial standpoint.


Proactive Health Monitoring & Predictive Maintenance:
Downtime is costly. The PLUS series features continuous, real-time internal diagnostics far beyond standard monitoring. PLUS technology does much more than create new energy assets, it provides actionable insights through the use of predictive analytics based on the historical usage patterns and stress levels of the components of the PLUS system. Alerts can be created to notify you of the likelihood of component failures well before they occur, allowing you to implement a proactive maintenance program and maximize the uptime of your investment while maximizing income.
Fortified Security for Modern Networks:
The importance of Cybersecurity in a Globalized Economy is at an all-time high. To address this need, the PLUS model is designed to incorporate layers of integrated security features. This includes secured booting, secure communication through 5G technology, and ongoing firmware updates to provide protection from cyber attacks originating outside the organization. You are now able to protect your critical energy infrastructure from external interference and cyber-attacks with the PLUS model of operation.


Seamless Scalability & Future-Proof Integration:
The PLUS architecture allows for easy growth capacity for your solar array, e.g., new technologies - electric vehicle charging stations, hydrogen electrolyzers or complex microgrid controllers - to be integrated in the future. The standard communication protocols between the PLUS architecture and third parties give you a large ecosystem of devices that will protect your initial investment from becoming obsolete.
Frequently Asked Questions of Solis 255K Hybrid Inverter
Q1: Is the Solis 255K Hybrid Inverter suitable for my specific application (e.g., factory, warehouse, large office building)?
A1: The PLUS unit is an extremely well-built piece of equipment, which is designed and controlled using advanced technology, making it highly suited to support the requirements of users who are operating in very demanding Commercial & Industrial (C&I) environments. Through our consultation with Clients, we provide an analysis of energy use patterns, available roof or ground space, and applicable Local Laws/Regulations and confirm that the PLUS is suitable for this application and will design the most efficient configuration possible for their needs.
Q2: How does the "PLUS" truly differ from previous Solis models?
A2: While all Solis inverters are renowned for reliability, the PLUS series represents a significant leap. Key differentiators include the advanced predictive health monitoring, enhanced cybersecurity framework, superior grid support algorithms for unstable grids, and deeper integration capabilities for batteries and other smart loads. It's built for the complexities of modern energy systems.
Q3: What kind of monitoring and control do I get?
A3: The PLUS has an advanced cloud-based monitoring solution that gives users instantaneous and historical information on energy use, production, "system health" status, "alarm" notifications and performance metrics, among other items. Additionally, the PLUS' intelligent logic allows users to utilize dynamic control strategies (i.e., battery charging and discharging) via the monitoring platform.
Q4: How does the 5G connectivity benefit me?
A4: The built-in 5G modem enables much faster, much more reliable and lower latency communications than traditional cellular/WiFi options. This enables the nearly instantaneous transmission of critical monitoring/control data while also significantly improving both the encryption protection associated with such systems and connectivity to 5G-enabled areas where legacy networks are expected to be weak or not available.
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product parameters
| DATASHEET | |
| Models | 255K |
| Input DC | |
| Max. input voltage | 1500 V |
| Rated voltage | 1080 V |
| Start-up voltage | 500 V |
| MPPT voltage range | 480 - 1500 V |
| Max. input current | 12 × 30 A |
| Max. short circuit current | 12 × 50 A |
| MPPT number / Max. input strings number | 12 / 24 |
| Output AC | |
| Output power | 255 kVA@30°C / 235 kVA@40°C / 220 kVA@50°C |
| Rated grid voltage | 3/PE, 800 V |
| Grid voltage range | 640 - 920 V |
| Rated grid frequency | 50 Hz / 60 Hz |
| Max. output current | 184.0 A |
| Power factor | > 0.99 (0.8 leading - 0.8 lagging) |
| THDi | < 3% |
| Efficiency | |
| Max. efficiency | 99.0% |
| EU efficiency | 98.8% |
| Protection | |
| DC reverse-polarity protection | Yes |
| Short circuit protection | Yes |
| Output over current protection | Yes |
| Surge protection | DC Type II / AC Type II |
| Grid monitoring | Yes |
| Anti-islanding protection | Yes |
| Temperature protection | Yes |
| Strings monitoring | Yes |
| I/V Curve scanning | Yes |
| Night time SVG function | Yes |
| Integrated PID recovery | Yes |
| Integrated DC switch | Yes |
| General Data | |
| Dimensions (W × H × D) | 1125 × 770 × 384 mm |
| Weight | 113 kg |
| Topology | Transformerless |
| Self-consumption (night) | < 2 W |
| Operating ambient temperature range | -30 ~ +60°C |
| Relative humidity | 0 - 100% |
| Ingress protection | IP66 |
| Cooling concept | Intelligent fan-cooling |
| Max. operation altitude | 4000 m |
| Grid connection standard | EN50549, G99, AS4777.2, VDE0126, IEC61727, VDE4110, CEA 2019 |
| Safety / EMC standard | IEC/EN 62109-1/-2, IEC/EN 61000-6-2/-4 |
| Features | |
| DC connection | MC4 connector |
| AC connection | OT terminal (max. 300 mm²) |
| Display | LCD |
| Communication | RS485, Optional: PLC |









