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Description
Blue Sea Ml-acr Automatic Charging Relay 24vdc 500aBlue Sea Systems ML ACR Automatic Charging Relay 24V DC 500A Model: 7621 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
Blue Sea Systems ML-ACR Automatic Charging Relay - 24V DC 500A
Model: 7621-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
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 | No |
| 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 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
4.8 ★★★★★
Based on 1726 reviews
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Product Reviews
★★★★★ 5
Good Choice
Size: X-Large, Color: Light Blue
Good fit. Comfortable. Looks great. I bought one color, then ordered 2 more. I am 5'9" and weigh 200 and I bought size XL. Perfect.
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Reviewed in the United States on October 31, 2025
★★★★★ 5
Super
Size: Large, Color: White
I recommend it!
Excellent quality.
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Yaaaasssss baby! YASSSSSSSSS!
Size: Large, Color: Navy Blue
I get hot and sweaty all the time- I could be sunning in a thong in below zero and still be- I need a fan. This shirt is NOT HOT- its handsome, feels nice, my wife loves it, it looks good dressed up or with shorts and I'm not needing to mop my face. It breathes and looks good. The fit is nice, I went up a size because it seems to run a wee bit small, thankfully the larger size is not longer so it doens't have to be hemmed or look silly.
So pleased. Wish there were other designs that weren't so crazy/flashy because I would order more.
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Reviewed in the United States on October 2, 2024
★★★★★ 5
La recomiendo.
Size: Small, Color: Black
Solo no me gusto la doble cobertura de los botones, ya que se hace un poco difícil ponertela.
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Reviewed in the United States on June 3, 2026
★★★★★ 3
Weird fit-
weird fit- not tight around the chest, but flared at the bottom- the stomach area was HUGE!!
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Reviewed in the United States on March 16, 2026