Magnum Energy MMS1012
#37 in Inverter-chargersFull review
For smaller RVs and trucks that want a rugged, listed 1,000 W inverter-charger and don’t mind paying for it.
Amazon $1,192$1,192
3.1/5
A proven drop-in replacement for discontinued Magnum units in large RVs and boats with 30 A dual-leg wiring. For a new build, the lighter Freedom XC Pro 3000 is the better buy unless you need stacking.
- 3,000 WContinuous
- 6,000 WSurge
- 3 AIdle draw
- YesUL listed
- 2 yearsWarranty
Check price at Amazon$2,081.97
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Starts and runs an RV air conditioner, with 6,000 W for 5 seconds
- Generator Support Mode lets a small generator run big loads
- Two units can stack for split-phase 120/240 V or 6000 W
- 150 A charger with dual 30 A AC inputs and outputs
Cons
- Draws about 3 A idle with search mode off
- Heavy at 60 lb
- No lithium preset; LiFePO4 needs the optional control panel to set up
The Xantrex Freedom SW family
Every Xantrex Freedom SW model we rank, smallest first. Ratings compare each against its own size.
| Model | Continuous | Rating | Price |
|---|---|---|---|
| Xantrex Freedom SW 2000 | 2,000 W | 2.8/5 | $1,751.76 |
| Xantrex Freedom SW 3000 (this one) | 3,000 W | 3.1/5 | $2,081.97 |
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 | 815-3012 |
|---|---|
| Output | |
| Type | Pure sine wave inverter-charger |
| Continuous power | 3,000 W |
| Surge power | 6,000 W for 5 s |
| DC input range | 10 to 16 V |
| Idle draw | 3 A (36 W) |
| Power-saving draw | 0.7 A |
| Peak efficiency | 90% |
| Connections | |
| AC outlets | 0 |
| GFCI outlets | No |
| Hardwire terminal | Yes |
| USB ports | None |
| Transfer switch | Yes |
| Charger | 150 A |
| Lithium charge profile | No |
| Parallel units | Yes |
| Control and build | |
| Remote | Optional extra |
| App | Optional add-on |
| Display | No |
| Safety listing | ETL listed to CSA 107.1, UL 458 and UL 458 Marine Supplement |
| Cooling | load-controlled fan |
| Dimensions | 15.25 x 13.5 x 7.75 in (387 x 343 x 197 mm) |
| Weight | 60.5 lb |
| Warranty | 2 years |
| Released | 2013-04 |
Alternatives in this size
Samlex EVO-1212F-HW
#38 in Inverter-chargersFull review
The hardwired version of the EVO-1212F, for installers wiring it into an RV subpanel.
Amazon $1,204.97$1,204.97
SunGoldPower 4000W LF Split-Phase 12V
#40 in Inverter-chargersFull review
For off-grid homes that need 240 V appliances but run a 12 V battery bank. Most buyers at this size would do better with a 24 V or 48 V system.
Amazon $1,090 SunGoldPower $1,040$1,040
Compare
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