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  • Pure sine wave – Power your T.V.s, stereos, plasma screens, and other sensitive electronics without worry. The pure sine wave inverter and power factor corrected charger provide clean, reliable inverter power with low total harmonic distortion (THD) of less than 5%.
  • Easy-to-install – Install the MSH-M Series in four easy steps: simply connect the inverter’s output to your distribution circuits or electrical panel, connect your utility power cable to the inverter’s easy-to-reach terminal block, connect the batteries, and switch on the power.
  • Interchangeable – The MSH-M is interchangeable with the Magnum MS Series and uses the same accessories as the MS Series.
  • Lightweight – The lightweight aluminum base and cover also provides noise reduction and corrosion resistance. Multiple ports – The MSH-M Series provides multiple ports, including an RS485 communication port for network expansion, and a remote port.
  • Accessible design – The extra large AC access cover with terminal screw block and 360° DC connection terminals with covers make this inverter more accessible when it needs to be.
  • Convenient switches – The MSH-M Series comes with an on /off inverter-mounted switch with an easy-to-read LED indicator.
  • Buy with ease – The MSH-M Series is backed by a threeyear (36-month) limited warranty.


  • The MSH-M Series comes in 12 and 24 volt configurations, allowing you to choose the model that is right for you.

Model Numbers

  • MSH3012M
  • MSH4024M


  MSH3012M MSH4024M
Input battery voltage range 9 to 17 VDC 18 to 34 VDC
Nominal AC output voltage 120 VAC ± 5% 120 VAC ± 5%
Output frequency and accuracy 60 Hz ± 0.05 Hz 60 Hz ± 0.1 Hz
Total Harmonic Distortion (THD) < 5% < 5%
1 msec surge current (amps AC) 70 120
100 msec surge current (amps AC) 40 82
5 sec surge power (real watts) 3900 5800
30 sec surge power (real watts) 3800 5400
5 min surge power (real watts) 3200 4900
30 min surge power (real watts) 3000 4500
Continuous power output at 25° C 3000 VA 4000 VA
Maximum continuous input current 400 ADC 267 ADC
Inverter efficiency (peak) 90.0% 93.7%
Transfer time 16 msecs 16 msecs
Search mode (typical) < 8 watts < 8 watts
No load (230 VAC output, typical) 30 watts 25 watts
Waveform Pure Sine Wave Pure Sine Wave
  MSH3012M MSH4024M
Continuous output at 25° C 125 ADC 110 ADC
Charger efficiency (peak) 87% 87%
Power factor > .95 > .95
Input current at rated output (AC amps) 18 28
  MSH3012M MSH4024M
Transfer relay capability 60 AAC
Five stage charging capability Bulk, Absorb, Float, Equalize (requires remote), and Battery Saver™
Battery temperature compensation Standard with available temp sensor connected (battery temp 0 - 50 °C)
Internal cooling 0 to 120 cfm variable speed drive using dual 92mm brushless DC fans
Overcurrent protection Yes, with two overlapping circuits
Overtemperature protection Yes on transformer, MOSFETS, and battery
Corrosion protection Yes, PCB’s conformal coated, powder coated chassis/top, and stainless steel fasteners
Dual AC branch rated output breakers No
Listings ETL listed to UL/cUL 458, CSA C22.2 No. 107.1-01
Warranty Three years parts and labor
  MSH3012M MSH4024M
Temperature (Operating/Non-operating) -20° C to +60° C (-4° F to 140° F) to -40° C to +70° C (-40° F to 158° F)
Operating humidity 0 to 95% RH non-condensing
  MSH3012M MSH4024M
Dimensions (l x w x h) 13.75” x 12.65” x 8.0” (34.9 cm x 32.1 cm x 20.3 cm)
Shipping dimensions (l x w x h) 19” x 17” x 13” (48.3 cm x 43.2 cm x 33 cm)
Mounting Shelf or wall (vents not allowed to face downward unless ME-CB or MPX-CB is installed)
Unit Weight 55 lb (24.9 kg)
Shipping weight 63 lb (28.6 kg)
Max operating altitude 15,000’ (4570 m)
  • Marine Systems
  • RV Systems