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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.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 690 reviews
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Product Reviews
★★★★★ 1
Junk
Size: Large
They have molded seams in the center and squeaker part . Making them separate , with little use ...pretty much junk !
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Reviewed in the United States on December 15, 2025
★★★★★ 5
Good product!
Size: Large
These have become my cockapoo Max's favorite toys! He loves playing catch with them!
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Reviewed in the United States on May 18, 2026
★★★★★ 5
loud but in a good way
Size: 4.5"
Love these crazy loud squeeky balls. I bought two a bit too big but the dogs still love them. Yes, they will drive you insane but the dogs love them so much it's worth it watching the pups enjoy the balls. They are strong and safe as long as they aren't too small for your dogs mouth.
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Great for aggressive chewers - Great for clean teeth
I never thought these would stand up to my 60lb pittie puppy's chewing. But they are far and away her favorite toy and are holding up beautifully. One squeaker insert bit the dust -- which is not bad since it gives us one silent one. But otherwise they are holding up superbly to her powerful jaws. We have tried a lot of toys. So far, all the "for aggressive chewers" toys have been torn apart within days if we are lucky -- usually it's minutes. But these balls show little-to-no sign of wear. The squeakers are very loud which she loves can get a bit tiresome. So, as I mentioned, having one silent one is a great option. And she really likes the texture. She loves them so much, we bought a second set and will probably buy a third to have in reserve. (We are realistic and don't expect them to last forever.) All I have to say is "where's spiky ball" and she instantly stops what she is doing and goes on the hunt. A great buy!! (NOTE: It's been almost three months and one is just beginning to show some damage. Given that she plays with them non-stop, they've showed amazing durability. And everyone comments on how clean and beautiful her teeth are. I don't brush them or give her dental treats. So it has to be these balls!!)
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Reviewed in the United States on June 23, 2025
★★★★★ 5
Good sturdy ball for aggressive chewer
Size: 4.5"
Nice heavy duty ball that my 7 yr old pitbull can chew on and not destroy it in 2 minutes. Wish that could get 3 for the cost but whatever. Nice bright colors . Good size that he won't choke on it .
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Reviewed in the United States on March 30, 2026