Since you own a Solar 2150, you likely appreciate vintage equipment, but you can modernize it without losing character.
Before striking an arc, you must understand the machine’s limits. According to archived spec sheets for the Solar 2150:
| Specification | Detail | | --- | --- | | Input Power | 115V AC, 20A (Dedicated circuit recommended) | | Rated Output | 70A @ 20% Duty Cycle (or 90A peak, depending on revision) | | Open Circuit Voltage (OCV) | 28V DC | | Wire Feed Speed | 50 – 300 IPM (Inches Per Minute) | | Welding Wire Capacity | 2 lb. spool (8” diameter max) | | Wire Diameters | .023” – .035” Solid wire; .030” – .035” Flux-core | | Thermal Protection | Automatic resetting thermostat |
Crucial Note: The Solar 2150 is a DC Electrode Positive (DCEP) machine. For flux-cored wire (no gas), this is correct. For solid wire with gas, you do not need to reverse polarity—it is preset. solar 2150 wire feed welder manual
If this article doesn't solve your specific issue, here is where to hunt for the original PDF or paper copy:
Pro tip: The Solar 2150 shares 90% of its internal design with the Century 115-090 and Marquette 2150. If you cannot find a Solar manual, download the Century manual. The wiring diagram is identical.
Q: Can I use my Solar 2150 with an extension cord? A: The manual warns against cords longer than 25 feet. If necessary, use 12-gauge or thicker (10-gauge) cord. 14-gauge cords will cause voltage drop and poor weld quality. Since you own a Solar 2150, you likely
Q: What wire size is recommended? A: For auto body: .023” solid wire + C25 gas (75% Argon/25% CO2). For general outdoor work: .030” or .035” E71T-GS flux-cored wire. Never use aluminum wire in this machine.
Q: My wire feed motor runs but the roller doesn’t turn. A: The drive roll gear may be stripped. Open the case and inspect. Replacement gear kits are available online. This is a known wear point mentioned in later manual revisions.
Q: Is there a gas conversion kit? A: Most Solar 2150 models are dual-purpose. You only need to add a regulator and gas hose. The manual specifies a standard CGA-320 fitting for CO2/Argon mix. Pro tip: The Solar 2150 shares 90% of
Daily / Per Use:
Weekly:
Monthly: