Hoymiles Microinverter Single Unit

The world’s first daisy-chain single unit microinverter with extremely wide DC input operating voltage range (16-60V) and low

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General Details
The world’s first daisy-chain single unit microinverter with extremely wide DC input operating voltage range (16-60V) and low start-up voltage (22V only). Hoymiles single unit microinverter MI-250/MI-300 is the perfect selection for PV system with uneven number of panel numbers with world’s No.1 CEC weighted efficiency – 96.5% (peak efficiency – 96.7%) in 2015.


  • Up to 60V DC input voltage (natural rapid shutdown) to guarantee no electric shock & fire risk on rooftop


  • Module-level MPPT to ensure 10-30% more energy harvest compared with string inverter


  • Module-lever monitoring for remote troubleshooting & maintenance management

Smaller, Lighter & Easier

  • Smaller than A4 paper size, 1.98kG only with AC cable (1 m) integrated, one person’s easy installation

More stable & reliable

  • 6000V surge protection, MTBF (mean time between failure) > 550years, yearly failure rate < 0.18%

Better Payback (IRR)

  • Module-level solution, extremely low failure, longer generation(star-up voltage 22V only), low LCOE (Levelized Cost of Electricity) for long period (20+ year) of investment


Wiring diagrams for single unit microinverter


Model MI-250 / MI-300 (1X60 cells / 1X72 cells)
Input Data (DC)
Recommended input power (W) Up to 310 / 380
Peak power MPPT voltage range (V) 27 ~ 48 / 29 ~ 48
Start-up voltage (V) 22
Operating voltage range (V) 16 ~ 60
Maximum input voltage (V) 60
Maximum input current (A) 11.5
Input Data (DC) @208V AC @240V AC @230V AC
Rated output power (W) 250 250 250 / 300
Rated output current (A) 1.20 1.04 1.09 / 1.30
Nominal output voltage/range (V) 208/183-250 240/211-264 230/180-275
Nominal frequency/range (Hz) 60/59.3-60.5 60/59.3-60.5 50/45-55
Power factor >0.99 >0.99 >0.99
Output current harmonic distortion <3% <3% <3%
Maximum units per 20A branch 13 14 14 / 12
CEC peak efficiency 96.7%
CEC weighted efficiency 96.5%
Nominal MPPT efficiency 99.8%
Night time power consumption (mW) <50
Mechanical Data
Ambient temperature range (°C) -40~+65
Operating temperature range (°C) -40~+85
Dimensions (WxHxD mm) 178 X 153 X 28
Weight (kG) 1.98(including 1m AC cable)
Enclosure rating NEMA6(IP67)
Cooling Natural convection – No fans
Loading Quantity
Container 1X20’GP 1X40’GP / 1X40’HQ
Pallet No. 10 22
Carton No. 600 1260
Total Quantity 3000 6300
Other Features
Communication Wireless
Design lifetime > 25 years
Standard Compliance
EMC EN61000-6-3:2007+A1:2011EN61000-6-2:2005EN61000-3-2:2014 EN61000-3-3:2013
Safety En62109-1:2010EN62109-2:2011IEC 62109-1 Ed 1.0IEC 62109-2 Ed 1.0 UL Std No. 1741-Second Edition EN 60529
On-Grid AS/NZS 4777.2:2015VDE-AR-N4105:2011-08DIN V VDE V 0126-1-1/A1:2012:02 IEC61727:2004EN50438:2013ANSI/IEEE 1547.1IEC62116:2011UTE C 15-712-1:2010-07
Foto Produk
Microinverter Hoymiles Single Unit-01 Microinverter Hoymiles Single Unit-02 Microinverter Hoymiles Single Unit-03 Microinverter Hoymiles Single Unit-04 Microinverter Hoymiles Single Unit-05
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