A cheap inverter-charger for keeping a LiFePO4 battery topped up and running small appliances through outages. Specs come only from the Amazon listing.
Amazon $179.99
For full-time RVers who want a rugged low-frequency inverter-charger that will start air conditioners and charge fast from a generator.
- 2,000 WContinuous
- 3,300 WSurge
- 2.1 AIdle draw
- YesUL listed
- 3 yearsWarranty
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
- Low-frequency transformer handles big motor starts for minutes, not milliseconds
- Fast 100 A PFC charger is easy on generators
- ETL listed to UL 458; built for RV and fire-truck duty
- Made in the USA
- Heavy at 42 lb
- Draws about 2.1 A idle outside search mode
- Remote needed for lithium presets and most settings
The Magnum MS family
Every Magnum MS model we rank, smallest first. Ratings compare each against its own size.
| Model | Continuous | Rating | Price |
|---|---|---|---|
| Magnum Energy MS2012 (this one) | 2,000 W | 3.1/5 | $2,110.43 |
| Magnum Energy MS2812 | 2,800 W | 3.5/5 | - |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | MS2012 |
|---|---|
| Output | |
| Type | Pure sine wave inverter-charger |
| Continuous power | 2,000 W |
| Surge power | 3,300 W for 5 s |
| DC input range | 9 to 16.8 V |
| Idle draw | 2.1 A (25 W) |
| Power-saving draw | 0.7 A |
| Peak efficiency | 90.6% |
| Connections | |
| AC outlets | 0 |
| GFCI outlets | No |
| Hardwire terminal | Yes |
| USB ports | None |
| Transfer switch | Yes |
| Charger | 100 A |
| Lithium charge profile | Yes |
| Parallel units | No |
| Control and build | |
| Remote | Optional extra |
| App | Optional add-on |
| Display | No |
| Safety listing | ETL listed to UL/cUL 458, CSA C22.2 No. 107.1-01; meets KKK-A-1822E |
| Cooling | fan |
| Dimensions | 13.75 x 12.65 x 8.0 in (34.9 x 32.1 x 20.3 cm) |
| Weight | 42 lb |
| Warranty | 3 years |
Alternatives in this size
For larger RVs and boats that want a listed inverter-charger with fast lithium charging and generator support.
Amazon $1,913.32A tough low-frequency inverter-charger for cabins and RVs that run motor loads. It is heavy and has no safety listing.
Amazon $774 SunGoldPower $730Compare
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