The Xantrex Freedom X 1200 is the better 12V inverter overall, rated 3.4 to 3.1. The Xantrex Freedom X 1200 leads on idle draw and features. The Go Power! ASW-1200-12-TS wins on value. The Go Power! ASW-1200-12-TS costs $33.99 less ($398.74 vs $432.73).
A listed 1200 W hardwire inverter with a transfer switch, designed for truck sleeper cabs and work vehicles. Good value if you want a permanent install with shore-power pass-through.
Amazon $432.73For RVs that already have a converter or solar charging and want an inverter with a built-in transfer switch.
Amazon $398.74Prices 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.
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 | Xantrex Freedom X 1200 | Go Power! ASW-1200-12-TS |
|---|---|---|
| Overall rating | 3.4/5 | 3.1/5 |
| Value 30% | 25 $0.36 per continuous watt | 33 $0.33 per continuous watt |
| Idle draw 15% | 78 0.8 A idle (about 10 W) with nothing plugged in | 13 1.8 A idle (about 21.6 W) with nothing plugged in |
| Safety listing 15% | 100 ETL listed to CSA C22.2 No. 107.1 and UL 458 with marine supplement | 100 Certified UL 458; cULus certified |
| Warranty 15% | 25 2-year warranty | 25 2-year warranty |
| Features 15% | 62 optional remote, transfer switch, hardwire terminal, display; no app | 52 optional remote, transfer switch, hardwire terminal; no app |
| Efficiency 10% | 67 91% peak efficiency (maker rating) | 67 91% peak efficiency (maker rating) |
| Xantrex Freedom X 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 | 2,400 W for 5 s | 2,400 W for 3 s |
| DC input range | 10.5 to 16.5 V | 10 to 16.5 V |
| Idle draw | 0.8 A (10 W) | 1.8 A (21.6 W) |
| Power-saving draw | 0.6 A | 0.1 A |
| Peak efficiency | 91% | 91% |
| Connections | ||
| AC outlets | 0 | 0 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | None | None |
| Transfer switch | Yes | Yes |
| Parallel units | No | No |
| Control and build | ||
| Remote | Optional extra | Optional extra |
| App | No | No |
| Display | Yes | No |
| Safety listing | ETL listed to CSA C22.2 No. 107.1 and UL 458 with marine supplement | Certified UL 458; cULus certified |
| Cooling | load-controlled fan | - |
| Dimensions | 14.8 x 10.4 x 3.5 in (376 x 263 x 91 mm) | 227 x 86 x 346 mm (8.94 x 3.39 x 13.62 in) |
| Weight | 10.4 lb | 7.5 lb |
| Warranty | 2 years | 2 years |
