Magnum 1000W, 12VDC, 50A PFC Pure Sinewave Battery Inverter

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Magnum 1000W, 12VDC, 50A PFC Pure Sinewave Battery Inverter

Magnum MMS Series MMS1012

The MMS Series Inverter/Charger is a pure sine wave inverter providing a cost effective solution for those with smaller power needs in mobile applications. Versatile, easy-to-use, and lightweight, the MMS Series provides a reliable base for your energy system.

Power Factor Corrected (PFC) Charger: Our PFC charger is built into all of our inverter chargers. It uses less energy from a generator than a standard charger – using 25-30% less AC current than standard chargers.

Safe and reliable: The MMS Series is ETL Listed to the stringent requirements of UL/cUL 458 and CSA C22.2 #107.1-01 for mobile use.

Attractive styling: The modern, hourglass case, paired with the die cast aluminum base combines form with function, creating an attractive unit that uses its base as a heat sink for superior high temperature operation.


  • Standard transfer relay: The standard 20 amp transfer relay will pass AC power through the inverter when using shore or generator power.
  • Low/high battery protection: If your battery voltage reaches below 10 VDC or above 15.5 VDC, the MMS Series will automatically shut down.
  • Versatile mounting: Mount the MMS Series on a shelf, bulkhead, or even upside down.
  • Fan cooled: The MMS Series is fan cooled, enabling the unit to work well in confined spaces. If the inverter does exceed its temperature limits, it will automatically shut down and then restart when it cools down.
  • Current overload protection: The MMS Series will automatically shut down if its output wattage is exceeded or it detects a short in the wiring, saving the unit from costly damage.
  • Convenient switches: The MMS Series comes with an on/off front-mounted switch with an easy-to-read LED indicator.
  • Circuit breaker protection: This model comes with built in input and output circuit breakers for ease of installation.
  • Battery temp sensor: The standard battery temp sensor monitors temperatures from 0 - 50° C.
  • Buy with ease: The MMS Series is backed by a two-year (24-month) parts and labor warranty.



Inverter Specifications MMS1012
Input battery voltage:  9 to 17 VDC
Nominal AC output voltage: 120 VAC ± 5%
Output frequency and accuracy: 60 Hz ± 0.1%
Total Harmonic Distortion (THD): < 5%
1 msec surge current (amps AC): 38
100 msec surge current (amps AC): 21
5 sec surge power (real watts): 1750
30 sec surge power (real watts): 1600
5 min surge power (real watts):  1200
30 min surge power (real watts): 1050
Continuous power output at 25° C: 1000 VA
Maximum continuous input current: 133 ADC
Inverter efficiency (peak): 87%
Transfer time: 16 msecs
Search mode (typical): 5 watts
No load (120 VAC output, typical): 19 watts 
Waveform: Pure Sine Wave
Charger Specifications MMS1012
Continuous output at 25° C: 50 ADC
Charger efficiency: 84%
Power factor: > 0.95
Input current at rated output (AC amps): 7
General Features and Capabilities MMS1012
Transfer relay capability: 20 AAC (input current for charging and pass through)
Battery temperature compensation: Yes, 15 ft Battery Temp Sensor standard
Remote available (optional): Yes, MM-RC or ME-RC
Internal cooling: 0 to 59 cfm variable speed
Overcurrent protection: Yes, with two overlapping circuits
Overtemperature protection: Yes, on transformer and MOSFETS
On/Off with status indicator: Yes, front mounted and easily accessible
Low battery cutout: 10 VDC, adjustable with the ME-RC remote
AC output and input: Hardwire
GFCI Outlet: NA
Output circuit breaker: 15 A switchable
Input circuit breaker: 20 AAC
Listings: ETL Listed to UL/cUL458, CSA C22.2 #107.1-01, meets KKK-A-1822E standard
Warranty: Two years
Environmental Specifications MMS1012
Operating temperature: -20° C to +60° C (-4° F to 140° F)
Nonoperating temperature: -40° C to +70° C (-40° F to 158° F)
Operating humidity: 0 to 95% RH non condensing
Physical Specifications MMS1012

Dimensions (h x w x d):

16.6” x 8.4” x 4.7” (42 cm x 21 cm x 12 cm)


Shelf (top or bottom up) or bulkhead (vents up) 


23 lb (10.4 kg)

Shipping weight:

25 lb (11.3 kg)
Max operating altitude: 15,000’ (4570 m)
Construction: ABS plastic top and cast aluminum bottom
Testing for specifications at 25° C
Specifications subject to change without notice. 

Available Accessories


Fuse Blocks (ME-125F, ME-200F)


Remote (MM-RC, ME-RC)


Specifications subject to change without notice.

Limited Warranty Magnum Energy, Inc., warrants this MMS Series Inverter/Charger to be free from defects in material and workmanship that result in product failure during normal usage, according to the following terms and conditions: 1. The limited warranty for the product extends for 24 months beginning from the product’s original date of purchase. 2. The limited warranty extends to the original purchaser of the product and is not assignable or transferable to any subsequent purchaser. 3. During the limited warranty period, Magnum Energy will repair or replace (with factory new or remanufactured replacement items) at Magnum Energy’s option any defective parts, or any parts that will not properly operate for their intended use – if such repair or replacement is needed because of product malfunction or failure during normal usage. The limited warranty does not cover defects in appearance (cosmetic or decorative), or any structural or non-operative parts. Magnum Energy’s limit of liability under the limited warranty shall be the actual cash value of the product at the time the original purchaser returns the product for repair, determined by the price paid by the original purchaser. Magnum Energy shall not be liable for any other losses or damages. 4. Upon request from Magnum Energy, the original purchaser must prove the product’s original date of purchase by a dated bill of sale, itemized receipt. 5. The original purchaser shall return the product prepaid to Magnum Energy in Everett, WA. After the completion of service under this limited warranty, Magnum Energy will return the product prepaid to the original purchaser via a Magnum selected non-expedited surface freight within the contiguous United States and Canada; this excludes Alaska and Hawaii. 6. If Magnum repairs or replaces a product, its warranty continues for the remaining portion of the original warranty period or 90 days from the date of the return shipment to the original purchaser, whichever is greater. All replaced products and parts removed from repaired products become the property of Magnum Energy. 7. This limited warranty is voided if: • the product has been modified without authorization • the serial number has been altered or removed • the product has been damaged through abuse, neglect accident, high voltage, or corrosion • the product was not installed and operated according to the owner’s manual BEFORE RETURNING ANY UNIT, CONTACT MAGNUM ENERGY FOR A RETURN MATERIAL AUTHORIZATION (RMA) NUMBER.