3CZY 140A Smart Dual Battery Isolator Relay: Voltage sensitive relay
Ever been stuck because your main battery decided to take an unexpected nap? The Smart Dual Battery Isolator Relay is like a superhero for your vehicle's power system, making sure your batteries charge up without sucking the life out of your main one. Whether you're cruising in your car, living it up in an RV, tackling the wild in an off-roader, or sailing the seas on a yacht, this gadget's got your back. It's smart, too—knows exactly when to link up or cut ties between your main and auxiliary batteries based on voltage, no manual fuss needed.
Why you'll love it:
- Say goodbye to the horror of a drained main battery—this thing keeps it safe and sound.
- It's like having a personal assistant for your batteries, handling the charging so you don't have to.
- Installation? Easier than figuring out why your GPS took you on a scenic route.
- Built tough to laugh in the face of rough weather and rough roads alike.
Features
- Dual battery isolation
- For automotive use
- Compatible with RVs
- Suitable for off-road vehicles
- Yacht compatible
- Voltage sensitive relay
General specs
- Brand: 3CZY
- Model: 140A
- Seller: Joom
- ID: 6863c7d4262f57012774b681
- Compatibility: Automobiles, RVs, Off-road vehicles, Yachts
- Type: Dual battery isolator
- Voltage Sensitivity: Yes
- First listed by seller: 7/11/25
If you are interested in more details, you can find full information on the seller's page.
View on seller's site
#publicidad
$205.03
Last price update: 11/15/25
Out of stock
Price History for seller Joom
| Date | Price |
|---|---|
| 11/15/25 | $205.03 |
| 7/11/25 | $164.75 |
Shipping options
Delivery to 
United States
United States
Unavailable
Video Reviews
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
3CZY 140A Voltage sensitive relay
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VEVOR OT029
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VEVOR VSR002
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| Brand | 3CZY | VEVOR | VEVOR | Renogy | ||
| Model | 140A | OT029 | VSR002 | RBC40D1S | ||
| Color | ||||||
| Rating |
|
|
|
|
|
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| Price | $205.03 | $53.99 | $21.90 | $12.70 | $49.99 | $199.99 |
| Seller | Joom | Vevor | Vevor | Gshopper | Gshopper | Amazon |
| Update | November 14, 2025 | August 16, 2025 | September 26, 2025 | July 25, 2024 | July 25, 2024 | December 6, 2025 |
Smart Dual Battery Isolator Relay
$205.03
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