Magnum Energy Pure Sine Inverter 3kW MSH3012RV-L

The Magnum Energy MSH3012RV-L is a 3,000VA pure sine wave RV inverter charger built around true hybrid technology that combines AC shore or generator power with battery power to run loads larger than either source could support alone. Designed specifically for RV, motorhome, and mobile applications, it features a built-in RV-C (CAN) connector for direct integration with the RV's network bus, lithium battery profile support, and dual AC inputs—each rated at 50A—in a corrosion-protected enclosure backed by a three-year warranty.

Key specifications

• Continuous output power: 3,000VA at 77°F (25°C)
• Surge power: 3,500W (5–30 seconds); 3,400W (5 minutes); 3,100W (30 minutes)
• AC output voltage / frequency: 120VAC ±3%; 60Hz ±0.05Hz; THD <5%
• DC input voltage: 12V nominal (9–17VDC operating range; full output 10.4–17.0VDC)
• AC inputs: 2 inputs; 50AAC maximum each; 60–140VAC input range; 50–70Hz
• AC relay transfer time: <16ms
• Battery charger output: 125ADC continuous; 5-stage charging (Bulk, Absorb, Float, Equalize, Battery Saver™); PFC power factor >0.95
• Load support max battery current: 224ADC
• Inverter efficiency (peak): 88%
• Charger efficiency: 86%
• Idle power consumption: 36W (inverting, no load); 10W (searching)
• Battery profiles: LFP (lithium iron phosphate), Gel, Flooded, AGM1, AGM2
• Communication: RV-C (CAN) compliant with electrically isolated port; RS-485 port; accessory port; battery temperature sensor port
• Certifications: ETL listed to UL/cUL 458; CSA C22.2 No. 107.1-01; RVIA RV-C compliant
• Operating temperature: −4°F to 140°F (−20°C to 60°C); max altitude 15,000 ft. (4,570 m)
• Enclosure: Powder-coated chassis; conformal-coated PCBs; stainless steel fasteners
• Dimensions: 13.75 L × 12.65 W × 8.0 H in. (34.9 × 32.1 × 20.3 cm); 55 lbs. (24.9 kg)
• Warranty: 3 years parts and labor

Load support: run larger loads from smaller generators

Standard inverter chargers operate in one mode at a time — either inverting from battery or passing AC from shore or generator power, never both simultaneously. The MSH3012RV-L's load support function parallels the inverter's battery output directly with the incoming AC source, allowing both to supply loads together. When a small onboard generator cannot meet peak demand on its own, the battery bank fills the gap in real time — drawing up to 224ADC — allowing the RV to run air conditioning, microwave, or other high-draw appliances from a generator that would otherwise be undersized for those loads. When demand drops below what the generator can supply alone, surplus generator power automatically recharges the battery.

Built-in RV-C integration

The MSH3012RV-L includes a factory-installed RV-C (CAN) connector that multiplexes directly onto the RV's network bus without requiring an external interface module. This allows the inverter charger's settings, status, and charging profiles to be read and adjusted through the RV's existing system monitoring display — eliminating a separate remote control in fully integrated OEM and aftermarket RV builds. The electrically isolated CAN port supports up to two MSH3012RV-L units per network. For installations using a Magnum remote control instead, the RS-485 port is available for that connection.

Application scenarios

• Class A, B, and C motorhomes: Dual 50A AC inputs handle split-phase 50A shore power service with Smart Line Sense keeping both AC outputs powered whether one or both inputs are active.
• Generator-dependent boondocking: Load support allows a compact, quiet generator to run loads that exceed its rated output, reducing generator size requirements and fuel consumption.
• Lithium battery upgrades: Preset LFP charging profile with battery temperature compensation (via optional ME-BTS sensor) protects lithium battery banks without manual charge parameter programming.
• High-altitude RV travel: Rated to 15,000 ft. (4,570 m), making it suitable for mountain camping and high-elevation destinations where altitude affects competing units.

Advanced features

• Smart Line Sense: Automatically configures both AC outputs to receive power regardless of whether one or both AC inputs are connected to an active source — no manual reconfiguration needed when switching between shore power and generator.
• Power Factor Corrected charging: The charger's PF >0.95 means it draws real, usable current from the generator rather than reactive current — resulting in more effective charging per generator amp and better generator compatibility.
• Five-stage charging: Bulk, Absorb, Float, Equalize (via remote), and proprietary Battery Saver™ mode extend battery service life through optimized charge management across all supported chemistry profiles.
• Corrosion protection: Conformal-coated PCBs, powder-coated chassis and top cover, and stainless steel fasteners protect against the vibration, moisture, and road environment exposure common in mobile applications.

System compatibility

The MSH3012RV-L is designed for 12V battery banks across a 9–17VDC operating range, supporting LFP (lithium iron phosphate), flooded, gel, AGM1, and AGM2 chemistries with selectable preset profiles. Battery temperature compensation is available with the optional ME-BTS sensor (sold separately). Compatible Magnum accessories include the ME-RC50-L and ME-ARC50 remote controls, ME-AGS-N auto generator start module, ME-BMK battery monitor kit, and ME-SBC smart battery combiner. The unit does not support inverter stacking. Shelf or wall mounting is supported; vents must not face downward unless an ME-CB or MPX-CB combiner box is installed.

Why choose the Magnum Energy MSH3012RV-L?

The Magnum Energy MSH3012RV-L is the right choice for RV owners and builders who need a pure sine wave RV inverter charger that goes beyond basic shore power pass-through — combining load support to supplement undersized generators, factory RV-C network integration for OEM-quality system control, lithium battery compatibility, and a three-year warranty in a corrosion-resistant enclosure built for the demands of full-time mobile use.