KTAC TECHNOLOGY, with over 20 years of continuous power supply manufacturing experience since 2004, presents the SUN Series—a comprehensive lineup of single-phase and three-phase hybrid Solar Inverters designed for residential solar self-consumption, whole-home backup power, and commercial energy storage applications. The SUN Series ranges from 5kW to 15kW, featuring a safe 48V low-voltage battery architecture, IP66 all-weather enclosures, dual MPPT trackers with high-current input capabilities, and up to 98% peak efficiency.
A hybrid Solar Inverter, also known as a hybrid solar inverter or energy storage inverter, is an advanced power conversion device that integrates the functionality of both a grid-tied solar inverter and an off-grid battery inverter into a single, unified system. Unlike conventional grid-tied inverters that shut down during power outages for safety reasons, or standalone off-grid inverters that cannot feed excess energy back to the utility grid, a hybrid inverter offers the best of both worlds: it can operate in on-grid mode, off-grid mode, and seamlessly transition between the two within milliseconds.
Selecting the optimal hybrid inverter for your specific needs requires careful evaluation of several critical factors:
1. Power Capacity – Assess your total load requirements. The SUN-5KS48P1-PRO (5kW off-grid / 5.5kW on-grid) is perfectly sized for a typical 3-4 bedroom home, powering refrigeration, lighting, entertainment systems, and multiple appliances simultaneously. For larger homes with electric vehicle charging and air conditioning, the SUN-6KS48P1-PRO (6kW off-grid / 6kW on-grid) provides 20% more power with up to 12kW of PV input capacity. For three-phase applications such as farms, workshops, or small commercial facilities, the SUN-8KS48P3 (8kW off-grid / 8.8kW on-grid) through SUN-15KS48P3 (15kW off-grid / 16.5kW on-grid) deliver the necessary three-phase power.
2. Single-Phase vs. Three-Phase – Single-phase hybrid inverters (SUN-5KS48P1-PRO and SUN-6KS48P1-PRO) are ideal for residential applications with standard single-phase grid connections. Three-phase hybrid inverters (SUN-8KS48P3 through SUN-15KS48P3) are essential for properties or businesses with three-phase electrical systems, supporting three-phase motors, industrial pumps, air compressors, and unbalanced load distribution across phases.
3. Battery Compatibility and Charging Current – All SUN Series inverters support both lithium (LiFePO₄) and lead-acid batteries with a 48V nominal voltage (configurable up to 60V). The maximum charge/discharge current ranges from 120A on entry models to 280A on flagship models like the SUN-15KS48P3, enabling rapid battery charging and support for large-capacity battery banks.
4. PV Input Capacity and MPPT Configuration – The SUN Series offers flexible PV array configurations. Entry models feature dual MPPT trackers with 18A/19A input and up to 12kW DC input power. Three-phase models feature dual MPPT with up to 36A input current (SUN-10KS48P3) or 36A/20A (SUN-15KS48P3), supporting up to 30kW of DC input power with 200% PV over-provisioning capability. This means you can connect more solar panels than the inverter's rated output to ensure maximum energy harvest even during cloudy conditions.
5. Environmental Durability – The SUN Series features IP66-rated, fully sealed enclosures, making them dust-tight and protected against powerful water jets. With an operating temperature range of -25°C to +60°C and support for altitudes up to 4,000m, these inverters deliver reliable performance across diverse climatic conditions—from freezing winters to scorching summers, coastal areas to mountainous regions.
All SUN Series hybrid inverters provide seamless transfer between on-grid and off-grid modes within just 10ms. This UPS-grade switching ensures that sensitive electronics—including computers, networking equipment, security systems, and medical devices—remain operational during grid outages without any perceptible interruption. Unlike standard grid-tied inverters that shut down completely during blackouts, the SUN Series continues to power your critical loads from battery storage, providing true energy security.
Off-grid peak power reaches twice the rated output for up to 15 seconds, providing the surge capacity needed to start motor-driven appliances such as refrigerators, air conditioners, water pumps, and compressors. This feature eliminates the frustration of overload tripping during startup—a common problem with lower-quality inverters. For the SUN-15KS48P3, this means a staggering 30kW surge capacity for 15 seconds, capable of starting the heaviest industrial motors and compressors.
The SUN Series is designed to accommodate the latest generation of high-power PV modules. Entry models feature dual MPPT with 18A/19A input current, while three-phase models support up to 36A per MPPT (SUN-10KS48P3) or 36A/20A (SUN-15KS48P3), perfectly matching 210mm/182mm large-format solar panels. The wide MPPT operating voltage ranges (150-450V for single-phase models, 200-800V for three-phase models) provide exceptional flexibility in PV array configuration, allowing installers to optimize string designs for maximum energy harvest.
The SUN Series achieves exceptional conversion efficiency: 97.6% peak efficiency for single-phase models and 98% peak efficiency for three-phase models, with 99.9% MPPT tracking efficiency. Every percentage point of efficiency translates into tangible savings over the system's lifetime. For a typical 10kW system, even a 1% efficiency gain can mean hundreds of additional kilowatt-hours of annual energy production, accelerating payback periods and increasing long-term savings.
The SUN Series supports up to 200% PV over-provisioning, allowing you to connect more solar panels than the inverter's rated output. This intelligent design ensures that your battery is fully charged even on cloudy days, during winter months, or in early morning and late afternoon hours when solar irradiance is low. For off-grid applications where energy independence is critical, this feature is essential for maintaining reliable year-round power.
The IP66-rated enclosure is fully dust-tight and protected against powerful water jets, making it suitable for installation in the most demanding environments. Unlike conventional inverters limited to indoor installations, the SUN Series can be confidently mounted outdoors—on exterior walls, in carports, on rooftops, or in coastal areas. This flexibility significantly expands installation options, preserving valuable indoor space and simplifying system design.
With built-in CAN and RS485 communication interfaces, the SUN Series integrates seamlessly with lithium battery BMS systems for real-time monitoring, adaptive charging algorithms, and cell balancing. This intelligent integration extends battery life, optimizes system performance, and provides users with comprehensive visibility into battery health and status. The inverters also support generator input for hybrid systems where grid access is unavailable.
The SUN Series incorporates a full range of protection features, including PV reverse polarity protection, insulation resistance detection, residual current monitoring, over-current protection, short-circuit protection, over-voltage protection, anti-islanding protection, surge protection, and an integrated DC switch. These multiple layers of protection ensure safe operation under all conditions, safeguarding both the inverter and connected equipment.
The SUN Series supports remote monitoring via Wi-Fi connectivity, allowing users to track system performance, adjust operating parameters, and receive alerts from anywhere in the world. The system's smart energy management capabilities—including time-of-use scheduling, peak shaving, and load management—enable users to optimize energy consumption and maximize savings.
SUN-5KS48P1-PRO (5kW Single-Phase): The ideal entry point for homeowners seeking solar self-consumption and basic backup power. Powers a typical 3-4 bedroom home with 120A charging current and 10kW PV input capacity.
SUN-6KS48P1-PRO (6kW Single-Phase): The flagship single-phase model for whole-home energy independence. Powers 4-5 bedroom homes with air conditioning, EV charging, and heavy appliances. Features 12kW PV input capacity—the highest in the single-phase lineup.
SUN-8KS48P3 (8kW Three-Phase): Designed for residential and light commercial three-phase applications. Features 190A charge/discharge current, 16kW PV input, and 200% surge capacity.
SUN-10KS48P3 (10kW Three-Phase): A commercial-grade solution with up to 36A MPPT input, 250A charge/discharge current, and 20kW PV input capacity.
SUN-12KS48P3 (12kW Three-Phase): Ideal for small factories, commercial buildings, and large farms. Features 250A charge/discharge current and supports generator integration.
SUN-15KS48P3 (15kW Three-Phase): The flagship three-phase model for heavy commercial and industrial applications. Features 280A charge/discharge current, 36A/20A MPPT input, and 30kW PV input capacity.
Residential Solar Self-Consumption: Store excess solar generation during the day for use during peak tariff periods in the evening, significantly reducing electricity bills.
Whole-Home Backup Power: During grid outages, the inverter seamlessly transitions to battery power within 10ms, keeping your entire home operational—including air conditioning, refrigeration, lighting, and internet connectivity.
Off-Grid Cabins and Remote Homes: For properties without grid access, the SUN Series provides a complete off-grid power solution with 200% PV over-provisioning for year-round reliability.
Commercial and Light Industrial: Small businesses, workshops, retail stores, and restaurants benefit from the inverter's UPS-grade backup and self-consumption capabilities. The IP66 rating allows flexible installation while high charging currents support rapid battery replenishment.
Farm and Agricultural Applications: Power irrigation pumps, ventilation systems, grain dryers, and other farm equipment—reducing dependence on expensive diesel generators.
Microgrid and Energy Community Projects: The SUN Series is well-suited for microgrid projects where multiple homes or businesses share a common solar and storage infrastructure. The three-phase output and grid-forming capability enable the creation of self-sustaining energy communities.
A: Yes. With an IP66 protection rating, the Hybrid Solar Inverters are fully dust-tight and protected against powerful water jets, making them suitable for both indoor and outdoor installation.
A: Single-phase models (SUN-5KS48P1-PRO, SUN-6KS48P1-PRO) are designed for standard residential single-phase grid connections. Three-phase models (SUN-8KS48P3 through SUN-15KS48P3) are for properties with three-phase electrical systems, supporting three-phase motors, pumps, and unbalanced loads.
A: Yes, the SUN Series can operate in on-grid mode without a battery, functioning as a standard grid-tied solar inverter. However, off-grid and backup functions require a battery.
A: All SUN Series inverters support both lithium (LiFePO₄) and lead-acid batteries with a nominal voltage of 48V and a maximum charging voltage configurable up to 60V.
A: The three-phase SUN Series models support parallel connection of up to 6 units (SUN-10KS48P3, SUN-15KS48P3), enabling system capacity scaling to 60kW or more. Please consult KTAC for specific configuration options.
A: The standard warranty for the SUN Series is 5 years, with extended warranty options available. Please contact our sales representative for detailed warranty policies.
