Blue Sea Systems SI Series 7610 Automatic Charging Relay 120A 12/24V
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Blue Sea Systems SI Series 7610 is an automatic charging relay (ACR) that intelligently manages charging across two battery banks while isolating them during engine starting to protect sensitive electronics. When the alternator or charger brings the primary bank to charge voltage, the SI Series automatically combines both banks for simultaneous charging — then separates them when charging stops, ensuring a dedicated starting battery is always available.
Rated at 120A continuous, the SI Series 7610 supports high-output alternators and is compatible with both 12V and 24V DC systems. A built-in LED indicates when batteries are combined, with an optional remote indicator for helm or panel mounting. One-piece tin-plated copper studs provide a permanent, vibration-resistant connection that will not loosen over time.
Key Features
- Automatically combines and isolates two battery banks based on charge state
- Isolates batteries during engine starting to protect electronics
- 120A continuous rating — supports high-output alternators
- Compatible with 12V and 24V DC systems
- Built-in LED indicates combined battery state
- Optional remote indicator connection
- Cover side and bottom cable entry breakouts for flexible installation
- One-piece tin-plated copper stud design — vibration-resistant, will not loosen
Parts Desk Insights
- Part Number: 7610
- SKU: 661-7610
- Type: Automatic Charging Relay (ACR) with Start Isolation
- Continuous Rating: 120A
- System Voltage: 12V or 24V DC
- LED Indicator: Built-in; optional remote indicator port
- Cable Entry: Cover side and bottom breakouts
- Studs: One-piece tin-plated copper — permanent, vibration-resistant
- Weight: 499g
- Installation Note: Confirm alternator output and battery bank wiring gauge before installation; 120A rating requires appropriately sized cable and fusing
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.