Parallax Power Supply has a long history of developing and manufacturing automatic transfer switch devices for both 30A and 50A service connections.

Line generator switch designed for 120VAC 30 amp service connections. The ATS301 was designed to be inverter friendly and works well with modified sine wave inputs.

Line generator switch designed for 120/240VAC 50 amp service connections. Like the ATS301, the ATS501 is inverter friendly. Auxiliary connections on the ATS501 can be used for "in phase" generators, or configured for use with energy management systems.

Parallax Power Supply no longer provides live technical support for any of the following transfer switch devices, although there is an extensive amount of information available on our website including technical information, and upgrade options when possible:

30 AMP:
           ATS30
           ATS (Option A)

50 AMP:
           ATS50
           ATS100
           ATS5070

Please note ALL email, web or phone requests for these products will be referred directly to this website without exception! These products are often times several years old if not decades in some cases, manufacturing of components has long ceased and replacement inventories have long been exhausted. We maintain the documents on our website for informational purposes primarily for wiring information and to help our customers choose suitable replacements. Thank you in advance for your understanding and cooperation regarding these obsolete products.