Description
A Solar Array Is Only As Useful As The Point Where Its Power Becomes Alternating Current. Panels produce direct current, the grid does not accept it, and the device standing between those two facts decides how much of the harvest actually reaches the meter. This is that device, and the specification is where its argument lives.
Each unit connects to one photovoltaic module and converts through maximum power point tracking across a 28 to 55 volt window, with an operating range from 20 to 60 volts and a 20 volt start-up threshold. Output is single-phase at 120 or 230 volts matched automatically, pure sine wave, with the frequency tracking 50 or 60 hertz without configuration. The range covers five models in the same chassis, the SG600MS and SG600MD at 600 watts maximum output, the SG700MD at 700, the SG800MD at 800 and the SG1000MD at 1000, with rated outputs of 590, 590, 650, 760 and 950 watts respectively. The 230 volt branch accepts up to eight units, and the integrated AC bus cable means a branch assembles without a separate wiring loom.
The enclosure measures 145 by 140 by 33 millimetres and weighs 1.8 kilograms, which is light enough to mount on the rail behind the panel rather than running direct current back to a central inverter. It is rated IP65, so rain is not a service event. Communication and monitoring run over 2.4 GHz wireless, and the platform supports flexible three-phase configurations from single-phase units. When a unit does stop, the manufacturer is direct about the most common cause: a damaged DC or AC fuse, which is a replaceable part rather than a dead inverter, and one they will send.
Convert at the panel, and the losses never get a chance to accumulate.
Key Features
- ✦ One unit per photovoltaic module, converting at the panel rather than at a central inverter
- ✦ Maximum power point tracking across a 28 to 55 volt window
- ✦ Pure sine wave single-phase output at 120 or 230 volts, matched automatically
- ✦ Five models in one chassis: 600, 600, 700, 800 and 1000 watts maximum output
- ✦ Output frequency auto-matches 50 or 60 hertz without configuration
- ✦ Up to eight units per 230 volt branch, with integrated AC bus cable
- ✦ IP65 enclosure weighing 1.8 kg, sized for rail mounting behind the panel
- ✦ 2.4 GHz wireless communication and monitoring, supporting flexible three-phase systems
Technical Specifications
- Brand: Y&H
- Model series: SG
- Models: SG600MS, SG600MD, SG700MD, SG800MD, SG1000MD
- Type: Grid tie micro inverter, single phase output
- MPPT voltage range: 28 to 55 V
- Operating voltage range: 20 to 60 V
- Maximum input voltage: 60 V
- Start-up voltage: 20 V
- Maximum input power: 1 x 600 W, or 2 x 300 W, 2 x 350 W, 2 x 400 W, 2 x 500 W by model
- Maximum input current: 20 A, or 2 x 10 A, 2 x 11.66 A, 2 x 13.33 A, 2 x 16.66 A by model
- Rated output power: 590 W, 590 W, 650 W, 760 W, 950 W by model
- Maximum output power: 600 W, 600 W, 700 W, 800 W, 1000 W by model
- Output voltage: 120 V / 230 V automatic
- Nominal output current: 120 V at 4.9 to 7.9 A, or 230 V at 2.6 to 4.1 A by model
- Output frequency: 50 Hz / 60 Hz automatic match
- Output waveform: Pure sine wave
- Communication: 2.4 GHz wireless monitoring
- Branch capacity: Up to 8 units per branch at 230 V
- Enclosure rating: IP65
- Dimensions: 145 x 140 x 33 mm
- Weight: 1.8 kg
- Certification: CE
Where It Belongs
Roofs with shading problems are the clearest case for micro inverters, because one shaded or dirty panel drags down an entire string on a central inverter and only its own output on a per-module unit. Balconies, carports and outbuildings gain from the same logic at smaller scale, and because the enclosure is IP65 and 1.8 kilograms, mounting it on the rail behind the panel avoids running direct current across a building. Installers value the integrated AC bus cable and the eight-unit branch limit, which turn a long roof into a repeating module rather than a wiring design exercise each time. Three-phase sites use single-phase units grouped across phases, which keeps the equipment identical across the installation. Owners monitoring output from a phone use the 2.4 GHz link to spot a soiled panel before a month of degraded yield has passed. Where a unit does fail, the answer is usually the DC or AC fuse, and knowing that turns a service call into a part replacement.
The EastSupplier Promise
Every unit is inspected before it leaves the warehouse. If a specification on this page does not match what arrives, we cover the return shipping and replace it. English-language support answers within one business day, and replacement parts for this category are stocked so a working unit stays working.
Frequently Asked Questions
Q: How many panels can one inverter take?
One unit connects to one PV module in the single-connector models, and the two-connector MD variants accept two panels within their input rating. The maximum input power by model is listed in the specification, running from 600 watts on the SG600MS to 2 x 500 watts on the SG1000MD.
Q: Does it work with 60 Hz as well as 50 Hz?
Yes. Output frequency auto-matches 50 or 60 hertz, and output voltage auto-matches 120 or 230 volts. There is no switch to set for a different market.
Q: What happens if a panel is shaded?
Because each unit tracks maximum power at its own module, a shaded panel affects only its own output rather than the whole branch. That independence is the main reason to choose per-module inverters over a central string inverter.
Q: How is it monitored?
Over a 2.4 GHz wireless link to the manufacturer's monitoring platform, which reports per-unit output and supports flexible three-phase configurations built from single-phase units.
Q: Can I mount it outdoors?
Yes, the enclosure is rated IP65. It weighs 1.8 kilograms and measures 145 by 140 by 33 millimetres, so it can be fixed to the mounting rail behind the panel where the direct current run is shortest.
Q: What is the most common failure?
A damaged DC or AC fuse, which is a replaceable component rather than a failed inverter. The manufacturer states that this accounts for the majority of reported non-working units and will supply replacement fuses.
Q: How many units can share a branch?
Up to eight units at 230 volts. The AC bus cable is integrated into the product, so a branch builds up unit by unit without a separate wiring harness.
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