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125A Automatic Transfer Switch


Regular price $799.99 Sale price $599 Save 25%
Selling fast — 650+ sold in the last 3 days Limited stock — order soon Free US shipping on every order Rated 4.8/5 by 2,000+ customers UL 2743 certified + 5-year warranty

Currently, this item is in stock

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• Seamless Automatic Power Transfer: Automatically detects utility outages and switches to backup power instantly—no manual action required for continuous, reliable operation.
• High-Capacity & Broad Compatibility(125A Bus Bar): Works with most solar generators, battery backup systems, grid-tie inverters, and gas generators. Supports 120V, 120/240V, and 120/208V systems and is fully compatible with AFCI and GFCI breakers.
• Grid-Tie Inverter Friendly with Parallel Power Path: Creates a parallel power path for grid-tie inverters, allowing them to continue operating during outages and safely deliver power through the ATS to an AC-coupled battery system—maximizing solar utilization even when the grid is down. Connection Instructions (Video)
• Can Remain on Backup Power even after Utility Power Is Restored: The ATS does not have to automatically switch back to normal utility power, allowing continued use of backup power when desired.
• Extensive Circuit Coverage: Rated at 125A with 24 circuit spaces, expandable up to 48 circuits using tandem breakers to accommodate expanding power needs.
 Rugged, Weather-Resistant Enclosure: Built with a NEMA 3R-rated enclosure to protect against rain, dust, and harsh weather, suitable for both indoor and outdoor installations.
 Advanced Control & Manual Override: Features a centralized control console for managing settings, testing system functionality, and manually overriding power sources for maintenance or user preference.
 Certified for Safety & Code Compliance: Meets rigorous safety and performance standards including UL 1008 and CAN/CSA C22.2 No. 178.1, with documentation showing compliance under ISO/IEC Guide 17067.

We offer free standard shipping on all U.S. orders (additional fees apply for Alaska and Hawaii). All shipping costs are shown at checkout — no hidden fees.

  • Processing: 1–2 business days. Orders placed before 5 PM EST begin processing the same day.
  • Delivery: 4–7 business days via USPS, UPS or FedEx; larger items ship by LTL freight.
  • Tracking: a tracking number and link are emailed as soon as your order ships.
  • Insured: every shipment is insured against loss or damage in transit.

Need help? Email support@radiantridgesupply.com or call +1 866-814-1390 (Mon–Fri, 9 AM–5 PM EST).

Read the full shipping policy

30-day returns. Return any item within 30 days of delivery, provided it is unused, undamaged and in its original packaging with proof of purchase.

  • Free return shipping — we cover the cost and email you a prepaid label with instructions.
  • Refunds go to your original payment method within 7 days of us receiving and inspecting the item.
  • Changed your mind? Returns are refunded minus a 25% restocking fee.
  • Damaged, defective or wrong item? Tell us within 48 hours with a photo for a free replacement or full refund — return shipping included.
  • Free exchanges on any defective, damaged or incorrect item.

Non-returnable: custom or personalized products, perishable goods, intimate or sanitary goods, gift cards and downloadable software.

To start a return, email support@radiantridgesupply.com or call +1 866-814-1390 (Mon–Fri, 9 AM–5 PM EST).

Read the full return policy
125A Automatic Transfer Switch

125A Automatic Transfer Switch

Regular price $799.99 Sale price $599

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