AHP AlphaTIG 203Xi
#2 in AC/DC TIGFull review
A complete, hard working AC/DC TIG for the home fabricator who welds aluminum often. Its duty cycle beats most machines near its price.
Amazon $689 AHP $670$670
The AHP AlphaTIG 203Xi is the better TIG or stick welder overall, rated 4.2 to 4.0. The AHP AlphaTIG 203Xi leads on features. The Lotos TIG200ACDC wins on value. The Lotos TIG200ACDC costs $281.20 less ($388.80 vs $670).
Lotos TIG200ACDC
#6 in AC/DC TIGFull review
A cheap, complete starter kit for someone learning aluminum TIG. Expect to work in short runs.
Amazon $388.80$388.80
Prices were last checked November 2, 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 AHP AlphaTIG 203Xi for features (high-frequency start, pulse, foot pedal in the box, dual voltage vs high-frequency start, foot pedal in the box, dual voltage).
- Choose the Lotos TIG200ACDC for value ($1.94 per amp ($388.80, 200 A maximum) vs $3.35 per amp ($670, 200 A maximum)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every AC/DC TIG TIG or stick welder; a clear win is highlighted. How we rank explains each one.
| Factor weight | AHP AlphaTIG 203Xi | Lotos TIG200ACDC |
|---|---|---|
| Overall rating | 4.2/5 | 4.0/5 |
| Value 30% | 68 $3.35 per amp ($670, 200 A maximum) | 100 $1.94 per amp ($388.80, 200 A maximum) |
| Duty cycle 20% | 100 60% at full output (200 A) | 50 duty cycle not published (neutral score used) |
| Features 25% | 100 high-frequency start, pulse, foot pedal in the box, dual voltage | 75 high-frequency start, foot pedal in the box, dual voltage |
| Warranty 25% | 50 3-year warranty on the machine | 50 3-year warranty on the machine |
Specifications
| AHP AlphaTIG 203Xi | Lotos TIG200ACDC | |
|---|---|---|
| Output | ||
| Processes | AC/DC TIG, stick | AC/DC TIG, stick |
| Maximum output | 200 A | 200 A |
| Maximum on 120 V | 150 A | - |
| Duty cycle | 60% at 200 A | - |
| Duty cycle ambient | 40 °C | - |
| Input | 120 V and 240 V | 120 V and 240 V |
| Features | ||
| Pulse | Yes | - |
| Foot pedal in the box | Yes | Yes |
| TIG torch in the box | Yes | Yes |
| Weight | 40 lb | - |
| Warranty | 3 years | 3 years |
| Released | - | 2017-11-25 |