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Description
Blue Sea Ml-acr Automatic Charging Relay 12vdc 500aBlue Sea Systems ML ACR Automatic Charging Relay 12V DC 500A Model: 7620 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 - 12V DC 500A
Model: 7620-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 | 12V 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
- 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
4.6 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Bouncy and durable
Color: Four colors, Size: 5cm (ball only), Color: Four colors, Size: 5cm (ball only)
These balls are awesome - bouncy and super durable for my little guy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
★★★★★ 5
Great quality
Color: Four colors, Size: 5cm (ball only)
I was very surprised that these are as good as the chuck it balls. I have a super chewer and he’s tears balls up except for chuck its and he can’t tear these up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
Happy pup
Color: Four colors, Size: 5cm (ball only)
Small but bouncy. Pupper loves them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
★★★★★ 5
Awesome price for quality balls
Color: Four colors, Size: 5cm (ball only)
These balls are super bouncy and durable. My dog loves them and for the price these are totally worth it! I think they are as durable as nerf balls and equal in size, and much cheaper!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 19, 2025
★★★★★ 1
Rope comes out at the slightest force. Pointless tug toy!
Color: Four colors, Size: 6cm (with rope)
If your dog pulls on these (and why wouldn’t he?), the rope immediately comes out. Turns out they just fuse the ends of the nylon rope together, which is no match for a dog playing tug. Any dog, any level of pulling will dismantle these.
We’ve managed to reinsert the rope to a couple of these and KNOT it, which gives you a shorter rope but a toy that can withstand some play. But if I had wanted a DIY toy, I’d have used the balls and rope I already own.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 11, 2025
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