When the power goes out, an automatic backup transfer switch is what lets your home start running on generator power without standing in the dark with a manual disconnect. An automatic transfer switch shifts the electrical load from utility power to the generator and then back again when the grid is stable. The four listings here all target the same Generac RXSW200A3 replacement application, but they split into two different ideas about what you are paying for. The lower-priced pair specify 120/240-volt single-phase service, while the other two cost more and add hardware features. The real question is whether you want a straightforward part-number match or a switch with extra capabilities.
Quick Take
All four switches are listed as New. Two listings share one title near the bottom of the price range; the other two share a different title higher up. The lower-priced pair emphasize the exact Generac RXSW200A3 part number, while the higher-priced pair add hardware features. Everything else about your choice comes down to whether those extra capabilities are worth the higher listed price.
Start with the Fit
Part-number matching is easy to compare. The two lower-priced listings use RXSW200A3 as both the interchange part number and the manufacturer part number. The higher-priced options list themselves under the Generac RXSW200A3 title as well, but their descriptions say they are compatible replacements rather than genuine Generac original parts. If having the exact part number in the listing matters to you, the lower-priced pair is the only set that puts it in both fields.
Listed-Price Comparison
| Product listing | Listed price | Price bar |
| Single Phase Generator Automatic Transfer Switch For Generac RXSW200A3 200 Amp | USD 339.00 | |
| Single Phase Generator Automatic Transfer Switch For Generac RXSW200A3 200 Amp | USD 339.00 | |
| 200 Amp Automatic Transfer Switch w/Power Management for Generac RXSW200A3 | USD 375.50 | |
| 200 Amp Automatic Transfer Switch w/Power Management for Generac RXSW200A3 | USD 390.00 | |
Decision Matrix
| If your priority is... | Choose... | Why |
| A direct part-number match | The OE QUALITY 200A switch | Direct Replacement fitment with RXSW200A3 listed as both interchange and part number. |
| A middle-price listing with extra hardware details | The ANNX 200A switch | Brand, country of origin, model/MPN, and aluminum enclosure are all part of the listing. |
| Evolution/Nexus controller compatibility | The top-priced 200A switch | This is the listing that explicitly notes compatibility with those controllers. |
Product Notes
Single Phase Generator Automatic Transfer Switch For Generac RXSW200A3 200 Amp - two listings at USD 339.00
Two separate listings appear under this exact title, and both are priced at USD 339.00. These are the lowest-priced choices in this comparison and the only ones listed with a Direct Replacement fitment. They share the RXSW200A3 interchange and manufacturer part number, along with a single-phase, 120/240-volt, 200-amp rating for 8-24 kW home standby generators. The item condition is New, and the item details include a 2-year warranty note. If you want a part-number-matched replacement and want to stay at the lower end of the price range, either listing fits that need. The limitation is that the two listings are identical in title, price, and key details, so you are choosing between two identical option sets.
200 Amp Automatic Transfer Switch w/Power Management for Generac RXSW200A3 - ANNX, USD 375.50
Priced at USD 375.50, this is the only listing in the group that provides all three details: a brand, country of origin, and model/MPN combination. It is described as a compatible replacement, not a genuine Generac original part, and it includes automatic transfer for whole-house backup plus DPM technology that manages up to 4 HVAC loads without extra hardware. The aluminum enclosure is called out in the listing. Choose this one if you want the power-management feature in a middle-priced option with brand details. The main trade-off is the higher listed price compared with the two lower-priced listings.
200 Amp Automatic Transfer Switch w/Power Management for Generac RXSW200A3 - USD 390.00
The most expensive listed option is USD 390.00. Like the ANNX switch, it is presented as a compatible replacement rather than a genuine Generac original part and includes the same DPM power-management and aluminum-enclosure details. The additional listed detail that sets it apart is compatibility with Evolution/Nexus controllers. If your generator setup uses one of those controllers, this could be the safer pick among the power-management switches. The limitation is the top price in the group.
Final Recommendation
If you want a direct part-number match, the two OE QUALITY listings at the lowest price are your match. If you need controller-compatibility confirmation, the top-priced listing makes that explicit. For the middle ground, the ANNX option adds the most descriptive brand and hardware details.
