Product Details
The 18kW High Frequency Three-phase Solar Inverter seamlessly connects with both solar panels and a high-voltage battery system. During the day, it efficiently converts solar energy to power your household or commercial loads while charging the battery for later use. At night, it draws energy from the battery to keep your system running without relying on the grid — helping you achieve true energy independence.
Let's be honest about solar. It’s great, but the heart of any solid system is the inverter. And if you're dealing with three-phase power—for a business, a serious workshop, or even a large, modern home—you need something that doesn't just work, but thinks ahead. This 18kw High Frequency Three-Phase Solar Inverter is exactly that. It's the central brain, blending raw power capability with genuinely smart management, and it truly delivers on the promise of actual energy independence.
| High frequency KA Series inverter technical parameters (selection guide) | |||
| Three phase mode | |||
| Factory model | KA18048SS | KA30048SS | |
| Inter | Input format | Three-phase+N+PE | |
| Rated input voltage | 3 x 380VAC/400VAC (3 phase + N line) | ||
| voltage range | 155-483VAC±3V (normal mode) 295-483VAC±3V (UPS mode) | ||
| Frequency Range | 50Hz/60Hz (adaptive) | ||
| Output | Output rated power | 18000W | 30000W |
| The output voltage | 380VAC±5% | ||
| Output frequency | 50/60Hz±0.1% | ||
| waveform | pure sine wave | ||
| Switching time (settable) | Computer equipment 10ms, household appliances 20ms | ||
| Peak power | 30000W | 60000W | |
| Overload capacity | Battery mode: 21s@105%~150% Load 11s@150%~200% Load 400ms@>200% Load | ||
| Grid-connected operation | The output voltage | 380VAC | |
| Feed into grid voltage range | 337-437VA | ||
| Feed into the grid frequency range | 49-51±1Hz/59-61±1Hz | ||
| Nominal output current | 3×26.9A | 3×47.8A | |
| Power factor range | >0.99 | ||
| Maximum conversion efficiency (DC/AC) | 98% | ||
| Battery | Rated voltage | 48Vdc | |
| Constant charging voltage (can be set) | 56.4Vdc | ||
| Float charging voltage (can be set) | 54Vdc | ||
| Charger | PV charging method | Three-way MPPT | Six-channel MPPT |
| PV maximum input power | 3×7500W | 6×5500W | |
| MPPT input voltage range | 60~500Vdc | 90~500Vdc | |
| Optimum Vmp operating range | 300~400Vdc | ||
| Maximum PV input voltage | 500Vdc | ||
| Maximum PV input current | 3×27A | 6×18A | |
| Maximum PV charging current | 360A | 450A | |
| Maximum mains charging current | 300A | 450A | |
| Maximum charging current | 360A | 450A | |
| Show | LCD interface | Can display operating mode/load/input/output, etc. | |
| Interface | RS232 | Baud rate 2400 | |
| Expansion slot communication interface | Lithium battery BMS communication card, WIFI card, dry contact card, etc. | ||
| Environmental parameters | Operating environment temperature | -10~50℃ | |
| Operating environment humidity | 20%~95% (no condensation) | ||
| Storage temperature | -15~60℃ | ||
| Altitude | The altitude should not exceed 1000m, derating above 1000m, up to 4000m, refer to IEC62040 | ||
| noise | ≤50db | ||
| Physical parameters | Depth × width × height (mm) | 465*500*500 | undefined |
| Weight(for reference)KG | 50.5 | TBD | |
| Standards and Certifications | EN-IEC 60335-1, EN-IEC 60335-2-29, IEC 62109-1 | ||
We all want power that’s reliable, especially when it comes to charging batteries. This unit excels here with high-power fast charging, pushing a substantial current to get your batteries filled up quicker. When it converts solar energy to power your home or business, it hits an impressive 98% conversion efficiency. Frankly, you shouldn't settle for less; every bit of sunlight you capture, you use.
The inverter features multiple PV inputs, which is a smart touch. It gives you the flexibility to lay out your solar panels in a way that truly maximizes sunlight capture throughout the day. And here’s where it gets clever: it flawlessly manages the flow between your solar panels and the grid, creating a PV and grid complementary load that keeps your power stable, no matter the weather.
We all know batteries are a significant investment. This inverter treats them with the respect they deserve. It boasts broad compatibility with various lithium battery protocols for charge and discharge management. This isn’t just a bullet point; it means the inverter and your batteries speak the same language, precisely controlling cycles to extend battery lifespan and keep them performing optimally. Plus, it handles a high-power, low battery voltage input, which gives you more flexibility in your battery bank design.
We really focused on making this practical for everyone involved. The tower front-end wiring and clearly marked terminals make installation straightforward and less of a headache for technicians.
Once it's running, you control everything directly through the touch screen display. It's intuitive and clear, showing you all the key information without needing to connect to a separate computer or complex software.
This inverter is a true workhorse. It adapts dynamically to various load conditions. Whether you're dealing with heavy industrial machinery that draws huge startup currents, or just the variable demands of a home, it maintains a stable output. Its smart load management automatically balances power across phases, ensuring reliable operation without system overload or imbalance.
An 18kW three-phase inverter should be checked against the site's actual load behavior. Motor start, phase balance, battery discharge current, and communication settings matter as much as the rated AC output.
For system planning, compare Solar Inverter, Solar Inverter, Solar Panel, and the Buyer Resources hub. For quotation support, send the load profile, inverter model, installation site, and target market through the Contact page.
For a visible comparison table that connects every product path, use the Battery Storage Product Selection Guide and the trust and compliance buyer guide.
For supplier capability, OEM/ODM support, documentation workflow, and after-sales coordination, review the SolarStorageHub Company Capability and Service Support Guide.
Related buyer guides: 18kw high frequency three phase inverter explained and can vs rs485 solar battery inverter compatibility. External reference: NREL PVWatts Calculator.
For installation acceptance, use the Hybrid Solar Inverter Commissioning Checklist to verify CT direction, export control, battery protocol, time-of-use settings, and backup operation.
For an existing solar retrofit, use the AC-Coupled vs DC-Coupled Home Battery Retrofit Checklist to review backup operation, export control, inverter limits, and warranty responsibilities.
Use these guides to compare grid mode, battery protocol, export control, PV input, backup output and commissioning evidence before choosing a storage inverter.
Use these guides to compare battery protocol, PV input, grid mode, export documents and commissioning support before approving an 18kW three phase inverter order.
It depends on peak demand, motor starting current, phase balance, and which loads need backup.
It can when voltage range, charge limits, and BMS communication are compatible.
Test load transfer, charge/discharge behavior, alarms, protection settings, and communication stability.
For a cleaner quotation request, prepare project details with the Solar Battery RFQ Checklist.
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