Wholesale Solar System For Home Factory & Quotes

VMAX POWER is the proprietary international export brand of Beijing Multifit Electrical Technology Co., Ltd. Founded in 2009 and situated in the Beijing Economic & Technological Development Zone, we are a publicly listed high-tech manufacturer (equity code 280768). We maintain full in-house R&D laboratories, surface-mount PCB assembly lines, transformer winding equipment, and testing facilities. B2B wholesale buyers engage directly with the engineering and factory teams, cutting out trading intermediary markups and ensuring direct factory technical recourse.

Low-frequency (LF) inverters integrate an oversized, heavy-gauge toroidal copper transformer between the switching bridge and the AC output. This massive magnetic core creates absolute galvanic isolation, protecting sensitive electronics from DC leakage and grid transients. Furthermore, it allows the inverter to absorb massive inductive start-up currents (up to 300% of rated capacity for 10-20 seconds) generated by compressors, borehole water pumps, and HVAC motors. High-frequency inverters rely on MOSFET switching without a transformer; while lighter, smaller, and cost-efficient for purely resistive electronic loads, they are susceptible to trip errors or thermal breakdown under heavy motor loads.

Our hybrid and energy storage inverters feature dual CAN bus and RS485 communication interfaces equipped with an extensive firmware protocol library. We maintain built-in compatibility with major global cell and pack manufacturers (including Pylontech, BYD, Dyness, CATL-based packs, and our proprietary VMAX LiFePO4 storage modules). In addition, our firmware engineering team provides custom protocol flashing and open MODBUS registers for utility-scale smart meter integration.

Our products and quality management systems are certified to ISO 9001 and ISO 14001 benchmarks. We hold over 20 CE conformity certificates, TUV Rheinland test reports, and IEC 62109-1 / IEC 62109-2 safety certifications, along with IEC 61000 EMC standards. For grid-connected models, anti-islanding protection and low-voltage ride-through (LVRT) comply with EN 50549-1, VDE-AR-N 4105, and IEEE 1547 guidelines. Full certification dossiers, test summaries, and declaration letters are issued with wholesale quotation packages.

In arid, coastal, agricultural, or high-pollution zones, airborne dust, particulate emissions, and bird fouling can degrade solar panel irradiance absorption by 8% to 25% within just 30 to 60 days. Manual cleaning using hoses and extension squeegees incurs high labor costs, consumes scarce potable water, risks glass micro-cracks from localized thermal shock, and introduces dangerous fall-from-height liabilities. VMAX automated cleaning robots and motorized brushes provide autonomous, waterless, non-abrasive maintenance that preserves modeled system ROI and eliminates installer safety exposure.

For standard factory-branded VMAX POWER inventory, MOQ starts as low as individual sample evaluation units or pallet-sized test orders. For full OEM/ODM private labeling—incorporating customized silkscreen logos, branded exterior color powder-coating, custom packaging artwork, and customized LCD/APP software boot screens—the standard MOQ is typically 50 to 100 units for inverters and battery modules, or one 20GP container for complete solar kits. Standard production lead times run between 15 and 25 working days from engineering sign-off.

We provide a 5-year standard factory warranty on inverters (extendable to 10 years upon request) and a 5 to 10-year cycle performance warranty on our LiFePO4 battery storage units. For container-level distributors, we supply 1% to 2% critical field replacement parts (such as control boards, LCD displays, cooling fans, and power boards) directly inside the container shipment. In the rare event of a verified component failure, our technical support desk diagnoses root-cause logs within 24 hours and dispatches air-freight replacement boards immediately without requiring the defective unit to be shipped back first.

Yes. Our low-frequency and hybrid inverter lines are engineered with dedicated internal transformer windings and configurable firmware to output pure split-phase 120V/240V (60Hz) for the United States, Canada, and parts of Latin America, standard single-phase 220V/230V/240V (50Hz/60Hz) for international domestic markets, and three-phase 230V/400V configurations for larger residential estates and light industrial commercial connections.