Engineered in-house with proprietary 32-bit DSP architectures, pure sine wave outputs, and toroidal copper isolation. Factory-direct supply for utility, industrial, and off-grid projects worldwide.
Toroidal transformer design, 300% peak surge buffer for inductive motor loads, 64K program space, and intelligent multi-stage battery charging.
Low Frequency Inverter
Ultra-light footprint, high power density up to 98% efficiency, dual MPPT tracking, ideal for modern residential rooftop arrays and electronic loads.
High Frequency Inverter
Seamless microgrid integration, peak shaving, UPS-grade millisecond transfer time, and full compatibility with high/low voltage LiFePO4 battery banks.
Energy Storage Inverter
Robust centralized conversion engineered for industrial workshops, commercial plants, and harsh remote sites with full galvanic isolation.
Power Inverter
Factory-matched PV modules, LF/HF inverters, and battery balance-of-system. Reliable electricity for islands, mining outposts, and agricultural grids.
Off Grid Solar System
Optimized LCOE generation for commercial roofs, net metering compliance, certified anti-islanding protection, and remote SCADA monitoring.
On Grid Solar System
Grade-A prismatic lithium iron phosphate cells with integrated smart BMS, CAN/RS485 communications, and 6000+ cycle life at 90% DoD.
Solar Battery
Advanced multiphase synchronous rectification technology, 99.5% tracking efficiency, broad DC input voltage window, and thermal management.
Solar ControllerThe worldwide transition toward renewable microgrids and industrial electrification has transformed DC to AC power inverters from commodity power converters into mission-critical grid assets.
Global commercial facilities are deploying on-site energy storage and pure sine wave inverters to mitigate skyrocketing demand charges and utility grid instability. Factory microgrids require high surge capacities to sustain peak inductive loads from CNC machinery, industrial pumps, and compressor chiller systems without voltage sag.
China manufactures over 78% of the world's inverter components. Partnering directly with high-tech listed enterprises like Beijing Multifit (Equity code: 280768) eliminates trading intermediaries, granting global procurement managers up to 35% CAPEX advantages, guaranteed bill-of-materials (BOM) transparency, and tailored OEM customization.
Severe environment installations—such as extreme heat in Middle Eastern desert sites or high humidity in Southeast Asia—demand military-grade conformal coating, thermal CFD simulations, and automated testing rigs. Every unit built undergoes burn-in stress runs under full electrical loads before international dispatch.
Indicative tier-volume baseline pricing for EPCs, distributors, and bulk purchasers (FOB Tianjin/Shanghai/Shenzhen). Actual quotes depend on custom firmware, branding, transformer materials, and regional certification requirements.
| Model Series | Rated Power | Input / Output Specs | Internal Topology | Surge Rating | FOB Unit Range (USD) | Application Tier |
|---|---|---|---|---|---|---|
| MF-LF-1000W | 1.0 kW | 12V/24V DC → 110V/230V AC | Toroidal Transformer (Copper) | 300% (3.0 kVA) | $110 – $145 | Residential / Marine |
| MF-LF-3000W | 3.0 kW | 24V/48V DC → 120V/240V AC | Toroidal Low Frequency | 300% (9.0 kVA) | $230 – $295 | Deep Well Pumps / Refrigeration |
| MF-LF-5000W | 5.0 kW | 48V DC → Single/Split Phase | Toroidal LF with Charger | 300% (15.0 kVA) | $380 – $470 | Commercial / Mini-Grid Hub |
| MF-HF-3600TL | 3.6 kW | 120–450V DC (High Voltage MPPT) | High Frequency Transformerless | 150% (5.4 kVA) | $185 – $240 | Urban Rooftop On-Grid |
| MF-HF-6200TL | 6.2 kW | 48V DC / 500V PV Voc | Dual MPPT High Frequency | 200% (12.4 kVA) | $270 – $340 | Residential Hybrid PV |
| MF-HY-10KW-3P | 10.0 kW | 48V Low Volt or 200–800V HV | Bidirectional PCS Hybrid | 200% (20.0 kVA) | $790 – $1,050 | C&I Peak Shaving Storage |
| MF-IND-30K-LF | 30.0 kW | 96V/192V/384V DC 3-Phase | Industrial Galvanic Isolated | 250% (75.0 kVA) | $2,400 – $3,100 | Heavy Industry / Mining Sites |
Toroidal transformers constructed from 100% pure oxygen-free copper feature 18% lower internal core losses and substantially higher thermal run limits compared to copper-clad aluminum (CCA), directly impacting long-term operational lifespan.
Tier-1 inverters incorporate discrete high-reliability IGBT or SiC MOSFET power switches from leading international suppliers, ensuring MTBF figures exceeding 100,000 hours under continuous 50°C operational ambient ceilings.
OEM private-label programs (custom metal enclosure silkscreen, tailored display firmware UI, packaging) typically start at an accessible 50-to-100 unit threshold, providing distributors brand differentiation in competitive regional markets.
Selecting the correct internal conversion topology is vital for system safety, total cost of ownership, and load compatibility. Below is an engineering evaluation between toroidal-transformer and high-frequency switched-mode systems.
| Evaluation Parameter | Low Frequency (Toroidal Transformer) | High Frequency (Transformerless / SMPS) |
|---|---|---|
| Galvanic Isolation | Full physical magnetic isolation between DC bus and AC loads | Non-isolated (capacitive coupling); relies on digital RCD protection |
| Surge Handling Multiplier | 300% (3× rated continuous output for up to 10 seconds) | 150% – 200% (typically limited to 100–500 milliseconds) |
| Motor & Inductive Compatibility | Exceptional: Absorbs heavy inductive inrush currents without tripping | Moderate: Sensitive to inductive back-EMF spikes; requires oversized capacity |
| Weight / Volumetric Power Density | Higher weight due to iron-silicon laminated toroidal core | Ultra-compact, lightweight, wall-mountable by single operator |
| Peak Efficiency | 90% – 93% (continuous minimal copper loss) | 96% – 98.4% (high-speed PWM switching with low internal dissipation) |
| No-Load Idle Power Consumption | 15W – 45W (magnetic core excitation) | 8W – 20W (efficient high-frequency logic) |
| Grid Surge & Lightning Resilience | High: Heavy copper mass naturally dampens utility transients | Moderate: Dependent on MOV surge arresters and fast clamp circuits |
| Optimal Deployment Scenario | Off-grid villages, farms, diesel generator hybrids, marine, pumps | Urban residential on-grid, telecom, sensitive IT server loads |
Unlike conventional square EI core transformers, toroidal transformers utilize an unbroken grain-oriented silicon steel ring. This eliminates magnetic air gaps, yielding a 95% magnetic flux containment efficiency, drastically reduced acoustic hum, and reduced electromagnetic interference (EMI).
Modern Multifit inverters utilize high-speed DSP processing cores running real-time Sinusoidal Pulse Width Modulation (SPWM). This ensures an ultra-clean Total Harmonic Distortion (THD < 3%), protecting microelectronics, medical gear, and variable frequency drives (VFDs).
Our next-generation commercial inverter development integrates Silicon Carbide (SiC) power switching modules, enabling 100 kHz switching frequencies, cutting passive filter volume by 40%, and elevating conversion efficiencies past 98.8% under dynamic load profiles.
A DC to AC inverter does not operate in isolation. In real-world projects, long-term operational success depends on how harmoniously the power electronics interact with solar modules, storage chemistry, and maintenance systems.
Isolated territories without utility infrastructure rely on our off-grid solar systems coupled with low-frequency toroidal inverters. The inverters provide grid-forming AC voltage references, enabling diesel generator fuel displacement of up to 85% while seamlessly absorbing motor start currents from water desalination pumps.
For manufacturing facilities under time-of-use (TOU) billing tariffs, our bi-directional energy storage inverters charge lithium batteries during off-peak morning hours and discharge during afternoon peak rate spikes. The integrated static transfer switch provides sub-10ms backup security for mission-critical IT servers.
High ambient temperatures and rapid dust soiling can degrade solar energy output by over 30% within weeks in arid regions. Beijing Multifit bridges the power electronics and operations gap by pairing rugged IP65 inverters with intelligent robotic cleaning systems, restoring yield without hazardous manual labor.
Founded in 2009 in the Beijing Economic & Technological Development Zone, Multifit (VMAX POWER) is a publicly listed enterprise (Equity Code: 280768) dedicated to research, manufacturing, and global renewable infrastructure.
Each inverter undergoes rigorous electrical test stages: AOI optical PCB inspection, 100% full-load burn-in soak testing at 45°C ambient, inductive surge strike simulation, and high-voltage dielectric isolation checks.
Our supply chain operates within certified environmental and quality management systems. Traceable serial barcodes from raw component batch incoming to containerized vessel departure ensure end-to-end reliability.
Clients interface directly with factory power electronics engineers for custom DC bus configuration, software MPPT tracking optimization, OEM front panel silkscreen design, and third-party laboratory verification support.
Technical, operational, and commercial answers compiled by our international sales engineers for prospective distributors, EPCs, and project developers.
Expand system performance and operational yields with Beijing Multifit's comprehensive ecosystem of automated cleaning robotics, PV modules, and autonomous lighting infrastructure.
Factory-matched on-grid, off-grid, and hybrid renewable energy plants tailored to residential estates and large industrial facilities.
Solar Energy Systems
Autonomous crawler robot restoring up to 25% generation loss caused by sand and dust on rooftop and utility-scale ground mount solar farms.
Solar Cleaning Robot
Telescopic carbon-fiber pole with counter-rotating disc brushes for efficient cleaning of commercial rooftop solar panel arrays.
Automatic Clean Brush
Integrated arrays combining high-efficiency PV modules, precision inverter electronics, and automated cleaning tracks for harsh climates.
Clean Solar System
N-Type TOPCon and PERC cell construction, offering low temperature coefficients and sustained power output under diffuse light conditions.
Solar Panel
Rugged die-cast aluminum housing, ultra-bright LED emitters, microwave radar motion sensing, and independent LiFePO4 battery pack.
Solar Flood Light
Unified solar module, lithium storage, and MPPT controller in a streamlined street luminaire. Ideal for municipal roadway tenders.
Solar Integrated Light
Dusk-to-dawn automated landscape illumination with tempered glass photovoltaic tops, corrosion-resistant alloy, and warm optical diffusion.
Solar Garden LightDirect procurement channels for overseas distributors, EPC contractors, and tender managers. Connect directly with factory power electronics engineers in Beijing to configure your custom voltage requirements, request pricing schedules, or initiate OEM private-label branding.
