3 Phase 15kW Hybrid Solar Inverter

This 3 Phase 15KW Hybrid Solar Inverter (Model: SUN-15KS48P3) was engineered to meet high-power, high-energy-consumption demands. Compared to standard models, its 280A battery charge/discharge capability allows it to pair with battery packs exceeding 300Ah, enabling a full charge within just 30 minutes. The high-current MPPT design supports larger PV arrays (maximum DC input of over 30kW), maintaining high power output even in low-light conditions or during winter.

It offers a 200% off-grid overload capacity (30kW for 15 seconds), allowing for the safe startup of demanding loads such as three-phase induction motors and central air conditioning compressors. The unit complies with international standards like IEC62109 and EN50549-1, supporting grid-tied feed-in, off-grid backup, and generator integration—making it ideal for factories, large farms, commercial complexes, and island power stations.

In off-grid mode, it supports a 200% peak overload (for 15 seconds), easily driving high-surge loads like large water pumps, air compressors, and elevators. With an overall efficiency of 98% and built-in generator interfaces and smart BMS communication, it serves as the ideal core for heavy-duty off-grid and three-phase backup power systems.

Product Parameter

Key Selling Points

1. Ultra-high 280A charge/discharge current

With a maximum charge and discharge current of 280A, 3 Phase 15KW Hybrid Solar Inverter supports rapid charging and discharging of 48V lithium battery systems at rates exceeding 0.5C, meeting high-throughput energy storage requirements.

2. 20A Ultra-High Input Current MPPT

Features dual MPPT channels; the second channel supports a maximum input current of 20A, perfectly matching large-format 210mm/182mm PV modules (rated >20A). This allows for fewer strings and reduced cabling costs.

3. 200% Off-Grid Peak Overload

In off-grid mode, the system supports a peak power of 30kW for 15 seconds (based on a 15kW rated output), easily handling the high inrush currents required to start three-phase motors, compressors, and cranes.

4. Massive PV Oversizing Capability

Supports a 200% PV oversizing ratio with a maximum DC input power of 30kW. This maximizes solar resource utilization, ensuring sufficient power for battery charging even during overcast days or early morning/late evening hours.

5. Intelligent Hybrid Energy Management

Includes a built-in generator auto-start interface that automatically controls the generator based on battery voltage levels, ensuring 24/7 uninterrupted power supply for off-grid systems. Also supports grid feed-in and anti-backflow (zero export) functions.

6. Comprehensive Protection & High Reliability

Equipped with PV reverse polarity protection, insulation monitoring, leakage current protection, and output over-voltage/over-current/short-circuit protection. Uses intelligent air cooling and operates in a wide temperature range of -25°C to 60°C (derating required).

Product Applications

1. Heavy-Duty Commercial & Industrial Energy Storage

Suitable for small factories, food processing plants, and auto repair shops. Solar power generated during the day supplies heavy equipment (air compressors, welding machines, woodworking machinery) while simultaneously storing energy for night shifts or emergency production needs.

2. Large-Scale Off-Grid Farms & Irrigation Systems

Powers 10–15kW three-phase deep-well pumps and pairs with battery packs exceeding 50kWh, enabling round-the-clock irrigation and feed processing in areas without grid access.

3. Commercial Complexes & Office Buildings

Serves as the core for peak-valley arbitrage and emergency backup power. The 15kW capacity supports critical loads such as lighting, elevators, HVAC systems, and servers, ensuring seamless switching during grid outages.

4. Hybrid Generator System

In remote mining areas, communication base stations, and border outposts, the system works alongside diesel generators to provide intelligent power supply prioritizing PV, using batteries for buffering, and utilizing generators for supplementation thereby significantly reducing fuel consumption.

Customization Support

The 3 Phase 15KW Hybrid Solar Inverter is a high-power flagship model, and we recognize that large-scale commercial and industrial projects often come with unique technical and branding requirements. KTAC offers flexible customization options to ensure the inverter integrates seamlessly into your specific application.

Visual Branding: Custom enclosure color and permanent logo printing (screen printing or laser engraving) to align with your brand identity.

BMS Protocol Matching: Pre-configure CAN/RS485 communication parameters for third-party lithium batteries (e.g., Pylontech, BYD, LG), ensuring plug-and-play BMS integration without on-site debugging.

Factory Parameter Presets: Set default operating modes (self-consumption, peak-valley arbitrage, backup priority), grid feed-in limits, and battery charge/discharge parameters before shipment—reducing on-site commissioning time.

Generator Auto-Start Logic: Adjust dry-contact trigger thresholds (battery voltage or load percentage) to match your generator's start/stop preferences.

Packaging & Documentation: Custom box artwork and multilingual user manuals (English, French, Spanish, Arabic, Russian) tailored to your export markets.

Parallel System Pre-Tuning: For multi-unit projects (up to 6 units in parallel), our engineering team can pre-configure master/slave addressing and communication parameters to simplify installation.

Lead time for custom orders: 10–15 days.

Contact our technical team to discuss your specific project requirements.

FAQ

1. What are the key differences between the SUN-15KS48P3 and the SUN-12KS48P3?

Higher power output: 15kW vs. 12kW, suitable for heavier loads.

Higher charging current: 280A vs. 250A, compatible with larger capacity batteries and enabling faster charging.

Higher MPPT current: 20A vs. 18A on the second channel, supporting the latest high-current PV modules.

Stronger overload capability: 30kW for 15 seconds, capable of driving motors with high starting currents.

2. What battery capacity is required to utilize the 280A charging capability?

A battery capacity of ≥ 280Ah (0.5C charging) is recommended; the ideal capacity is 400–600Ah. Our 51.2V 314Ah battery module (max. continuous charge/discharge of 200A) cannot fully utilize the 280A on its own; two units must be connected in parallel (totaling 600Ah+) or a battery with a higher C-rate must be selected.

3. Can three units be connected in parallel to form a 45kW three-phase system?

Yes. The SUN-15KS48P3 supports parallel connection of up to 6 units, allowing for a total power output of up to 90kW.

4. How should PV panels be configured to achieve 30kW input?

It is recommended to connect 2–3 strings of PV modules per MPPT channel (ensuring the total current remains within limits): connect 2 strings to MPPT1 (each string ≤18A) and 2 strings to MPPT2 (each string ≤20A). The total PV module power should be within 30kW, and the open-circuit voltage must not exceed 1000V.

5. Can the system support both three-phase and single-phase loads simultaneously in off-grid mode?

Yes. The inverter outputs balanced three-phase voltage, allowing single-phase loads to be connected to the respective phases; however, ensure that the current per phase does not exceed 22.8A (rated) or 34.2A (short-term peak). It is recommended to distribute the loads as evenly as possible.

6. What is the warranty period?

The standard warranty period is 5 years; please consult our technical team for specific terms and conditions.