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Description
Blue Sea Ml-acr Automatic Charging Relay With Manual Control 24vdc 500aBlue Sea Systems ML ACR Automatic Charging Relay with Manual Control 24V DC 500A Model: 7623 BSS Automatically manages the charging of two large battery banks Allows paralleling of battery banks for emergency starting 500 Ampere continuous rating to support high output alternators Magnetic Latch (ML)ACR draws very low current (<40mA to monitor terminal voltage) in the ""ON"" or ""OFF"" states, and draws moderate current for very short time when
Blue Sea Systems ML-ACR Automatic Charging Relay with Manual Control - 24V DC 500A
Model: 7623-BSS- Automatically manages the charging of two large battery banks
- Allows paralleling of battery banks for emergency starting
- 500 Ampere continuous rating to support high-output alternators
- Magnetic Latch (ML)—ACR draws very low current (<40mA to monitor terminal voltage) in the ""ON"" or ""OFF"" states, and draws moderate current for very short time when changing state
- Dual sensing—senses charge on both battery banks
- Start Isolation (SI)—can be configured for temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics
- Engine Isolation (EI)—can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output
- Senses charging on two battery banks
- Manual control switch provides an added level of safety allowing control with or without power, and offering LOCK OFF capability for servicing
500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine
Specifications| Control Circuit Connection | Tinned Wire |
| Nominal Voltage | 24V DC |
| Manual Control | Yes |
| Engine Isolation | Yes |
| Mounting | #10 |
| Start Assist | Yes |
| Start Isolation | Yes |
| Amperage Operating Current | 13mA |
| Amperage Operating Current when changing state | <7.0A |
| Terminal Stud Torque | 140 in-lb (15.82 Nm) |
| Continuous Rating | 500A |
| Intermittent Rating | 700A (5 min) |
| Cranking Rating 30 sec | 1450A DC |
| Minimum Operating Temperature | -10° C |
| Maximum Operating Temperature | 60° C |
| Cable Size to Meet Ratings | 4/0 AWG x 2 |
| Live Current Switching | 300A @ 12V DC |
| Stud Material | Tinned Copper |
| Switching Cycles | 100000 |
| Terminal Ring Diameter Clearance | Terminal Ring Diameter Clearance |
| Terminal Stud Length | 1.50in (38.1 mm) |
| Terminal Stud Size | 3/8"" - 16 (M10) |
| Wire Size | 20 AWG |
What's in the Box:
- ML-ACR Automatic Charging Relay with manual Control 24v
- SPDT Remote Control Contura Switch - ON-OFF-ON
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.4 ★★★★★
Based on 1821 reviews
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Product Reviews
★★★★★ 5
Good reading
Format: Hardcover
How could you go wrong with a book like this? Great for kids and adults alike
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Such an Adorable Book
Format: Kindle
This book was one I originally borrowed on Kindle to read to my twin niece and nephew to hopefully help them stop fighting. The book was so adorable, I bought it for Kindle to make sure I always had a copy. While the message is great, treating others with kindness, the illustrations and rhymes are what make it unique. There are some larger words used, but they are all in a clear context to help build vocabulary. The twins loved the farm animals and I actually used the book as part of a lesson on kindness for my Sunday school class who also enjoyed it. Even though I already have the Kindle version, I am ordering paper copies to give as Christmas gifts this year. I love this author, the illustrations, and the message. This is the type of children's book everyone can enjoy and agree on.
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Reviewed in the United States on June 27, 2021
★★★★★ 5
Bonito y fácil de leer
Format: Paperback
Es un libro muy bonito, fácil de leer, entretenido. A mi niño le gustó mucho.
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Reviewed in the United States on January 14, 2026
★★★★★ 5
A must book for children
Format: Paperback
I got this book 15 years ago at a garage sale and it was one of my kids favorite books of all time. We took it with us everywhere we went (in the car, on vacation etc). My daughter is now in her 20's and she works at a daycare center. She wanted to get some books for their library and when I reminded her of this book she had to get it for them. It has quickly become the classroom favorite, the children ask for her to read it to them daily.
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Reviewed in the United States on January 5, 2025
★★★★★ 5
charming and fun guessing game for little ones
Format: Paperback
charming and fun guessing game for little ones. my daughter is 15 months old and loves this book, we have to read it everyday. the drawings are so charming, we also play our own observation games, like there is a little ladybug on every page and I ask her where is the ladybug and she can always find it!
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Reviewed in the United States on November 2, 2015