Blue Sea Systems 7622 ML Series Automatic Charging Relay, 12V w/Manual Override
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Overview
ML Series Automatic Charging Relay (12V) automatically combines batteries during charging and isolates them during discharging and engine start, with configurable Start Isolation (SI) and Engine Isolation (EI). The manual override knob provides safe, power-independent control for servicing.
Key Features
- Magnetic Latching (ML) relay draws very low current in the ON state
- Senses charging on two battery banks
- LED output to remotely indicate switch state
- 3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 7/8" stud length accepts multiple cable terminals
- One-piece stainless flange nuts ensure safe and secure connections
- Label recesses for circuit identification
- Silver alloy contacts provide high reliability for live switching
- Includes Remote Control Contura Switch (2146)
Compatible Applications
- Marine electrical systems with two battery banks
- RV or off-grid electrical systems requiring automatic battery management
- 12V charging/isolating configurations in battery isolator/ACR setups
- Systems requiring Start Isolation (SI) and Engine Isolation (EI)
Product Details
- SKU: 661-7622
- Voltage: 12V
- Current rating: 500A magnetic latching (bi-stable) relay
- Terminals: 3/8"-16 tin-plated copper studs
- Stud length: 7/8"
- Weight: 726 g
- Barcode: 6.32085E+11
- Includes Remote Control Contura Switch (2146)
- Manual override knob for servicing (LOCKED OFF capability)
- One-piece stainless flange nuts
- Label recesses for circuit identification
- Silver alloy contacts
Parts Desk Insights
Best Use Case: Best used in marine or RV electrical systems with two battery banks to automatically manage charging and isolation, including Start Isolation (SI) and Engine Isolation (EI) configurations. The included manual override enables servicing without power.
Common Issues: Incorrect wiring or misconfiguration of SI/EI can affect performance; ensure proper wiring and configuration per the manual and verify cable sizing.
Related Products & Accessories
- Browse Relays & Solenoids - Related items in Relays & Solenoids; browse for compatible battery isolators and ACRs.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.