Get yours today!
In the last 7 days
Delivery timeframe shown above at checkout
Unlimited lifetime support, always available.
Trade pricing on 169 authorized brands. Full OEM warranties. 7-10 business days delivery.
Shop All ProductsPremium monocrystalline and bifacial panels with 25-year warranties from authorized manufacturers.
Shop Solar PanelsString, micro, and hybrid inverters from 8+ authorized brands. Full warranty and technical support.
Shop InvertersHome and commercial battery systems from leading manufacturers. Grid-tied and off-grid options.
Shop BatteriesRoof and ground mount systems from IronRidge, Unirac, and Quick Mount PV. All components in stock.
Shop RackingMPPT and PWM charge controllers for off-grid and hybrid solar systems from 5+ authorized brands.
Shop ControllersHome standby, portable, and commercial generators. Automatic transfer switches and installation accessories.
Shop GeneratorsLevel 1, Level 2, and commercial EV chargers from leading brands. Smart connectivity and universal compatibility.
Shop EV ChargersBreakers, panels, wire, conduit, and safety switches from Square D, Siemens, Eaton, and more. Not just solar.
Shop Electrical50,000+ SKUs, 169 authorized brands. Our team helps you find the right products for any project.
Get a Quote

The Delta Electronics M42U is a grid-tied, 3-phase, transformerless PV inverter designed to maximize efficiency in commercial and industrial environments. Featuring a wide input operation range and superior efficiency ratings, this inverter delivers optimal performance and reliability. With its easy installation and comprehensive protection features, the Delta M42U stands out as a leading solution for modern solar energy systems.
Experience versatility with a two-stage topology that supports an input voltage range from 200 to 1000 Vdc, enhancing adaptability across various PV systems.
The design allows for a 0-90 mounted installation, providing flexibility in setup and positioning to suit diverse site requirements.
Utilizing dual MPP trackers, the inverter optimizes PV array configurations, leading to maximized solar energy harvest and system efficiency.
Equipped with an integral DC arc fault detector, AC and DC disconnects, and Type 2 SPDs, the inverter ensures robust system protection and safety.
The NEMA 4X outdoor rated enclosure and ergonomic grip design facilitate effortless installation and maintenance in any environment.
The Delta M42U inverter seamlessly integrates into solar power systems, enhancing performance through advanced component functions and innovative technology for peak energy conversion.
Utilizing dual Maximum Power Point Tracking, the inverter achieves optimal power extraction from solar panels, boosting system efficiency and yield.
The built-in DC arc fault detection and disconnects are crucial for maintaining operational safety and prolonging equipment lifespan.
With a forced air cooling system, the inverter maintains ideal operating temperatures, enhancing reliability even in challenging environments.
| Recommended PV Power | 60kW |
| Max Input Voltage | 1100V |
| Operating Voltage Range | 200-1000V |
| Peak Efficiency | 98.6% |
| Rated Output Power | 42kW/42kVA |
| Operating Temperature Range | -13~140F (-25~60C) |
| Protection Level | NEMA 4X |
| Communication Port | RS-485 |
| Display | 20 x 4 LCD |
| Weight with Wiring Box | 131.1 lb |
From hurricanes to blackouts, reliable solar power ensures you're able to keep your home & family safe no matter what comes your way.
Making one-click solar solutions simple since 2018. Whether you’re powering a cabin, charging devices, or backing up your home.
Say goodbye to reliance on the energy companies. Enjoy the same freedom that 50,000+ customers have with their own solar power system.
$150 Value - Free Offer (Limited Time Only!) No Strings Attached. Totally Free. Takes Less than 2 Minutes.