Victron Phoenix 12/1200
For campers that want to run a small microwave or coffee maker from a lithium bank. Efficient and well protected.
Amazon DRSA $317.05$317.05
The Victron Phoenix 12/1200 is the better 12V inverter overall, rated 3.8 to 3.1. The Victron Phoenix 12/1200 leads on warranty, idle draw and value. The Go Power! ASW-1200-12-TS wins on features. The Victron Phoenix 12/1200 costs $81.69 less ($317.05 vs $398.74).
Go Power! ASW-1200-12-TS
#28 in 1,100 to 2,000 WFull review
For RVs that already have a converter or solar charging and want an inverter with a built-in transfer switch.
Amazon $398.74$398.74
Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Victron Phoenix 12/1200 for warranty (5-year warranty vs 2-year warranty), idle draw (0.9 A idle (about 11 W) with nothing plugged in vs 1.8 A idle (about 21.6 W) with nothing plugged in) and value ($0.26 per continuous watt vs $0.33 per continuous watt).
- Choose the Go Power! ASW-1200-12-TS for features (optional remote, transfer switch, hardwire terminal; no app vs optional remote, app add-on; no hardwire terminal).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 1,100 to 2,000 W 12V inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Victron Phoenix 12/1200 | Go Power! ASW-1200-12-TS |
|---|---|---|
| Overall rating | 3.8/5 | 3.1/5 |
| Value 30% | 52 $0.26 per continuous watt | 33 $0.33 per continuous watt |
| Idle draw 15% | 72 0.9 A idle (about 11 W) with nothing plugged in | 13 1.8 A idle (about 21.6 W) with nothing plugged in |
| Safety listing 15% | 100 LabTest certified to UL 458 (certificate LC20760-1) | 100 Certified UL 458; cULus certified |
| Warranty 15% | 100 5-year warranty | 25 2-year warranty |
| Features 15% | 25 optional remote, app add-on; no hardwire terminal | 52 optional remote, transfer switch, hardwire terminal; no app |
| Efficiency 10% | 67 91% peak efficiency (maker rating) | 67 91% peak efficiency (maker rating) |
Specifications
| Victron Phoenix 12/1200 | Go Power! ASW-1200-12-TS | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter | Pure sine wave inverter |
| Continuous power | 1,200 W | 1,200 W |
| Surge power | 1,600 W for 15 s | 2,400 W for 3 s |
| DC input range | 9.2 to 17 V | 10 to 16.5 V |
| Idle draw | 0.9 A (11 W) | 1.8 A (21.6 W) |
| Power-saving draw | 0.1 A | 0.1 A |
| Peak efficiency | 91% | 91% |
| Connections | ||
| AC outlets | 2 | 0 |
| GFCI outlets | Yes | No |
| Hardwire terminal | No | Yes |
| USB ports | None | None |
| Transfer switch | No | Yes |
| Parallel units | No | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | Optional add-on | No |
| Display | No | No |
| Safety listing | LabTest certified to UL 458 (certificate LC20760-1) | Certified UL 458; cULus certified |
| Cooling | fan | - |
| Dimensions | 117 x 231 x 374 mm (4.6 x 9.1 x 14.7 in) | 227 x 86 x 346 mm (8.94 x 3.39 x 13.62 in) |
| Weight | 15 lb | 7.5 lb |
| Warranty | 5 years | 2 years |