Sea-Dog 4227901 Smart Dual Battery Isolator, 12V
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
This Smart Dual Battery Isolator is ideal for dual battery applications.
- Allows two batteries to automatically charge at the same time and then isolates the batteries, ensuring the starting battery is always charged and ready for use.
- Automatically engages or disengages the circuit at pre-set voltages by sensing the input voltage generated, eliminating the possibility of discharging the primary starting battery.
- Cut-in voltage: 13.3V.
- Cut-out voltage: 12.8V.
- Surge protected.
- Features an LED indicator to alert the user when the unit is engaged.
- Constructed of machined brass with a weatherproof injection molded nylon housing and durable silver tipped contacts.
- Installs with two #8 RH fasteners (included).
- IP65 rating.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.