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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:
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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.
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4.3 ★★★★★
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★★★★★ 5
The best sunblock I've found!
Size: 6 Fl Oz (Pack of 2), Style: Lotion
I absolutely love this sunblock. I have sensory issues with any type of lotion and sunblock, but this stuff is incredible. It really is so lightweight that once it fully soaks in (which only take a few minutes) it feels as if there's nothing on my skin. This is huge for me, cause I just can't handle the feeling of any other sunblocks I've tried, even some more expensive brands. On top of all that, it definitely protects my skin from the sun, doesn't leave a white cast, and doesn't feel greasy while applying it.
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Reviewed in the United States on April 12, 2026
★★★★★ 4
My favorite sunscreen for being active outside
Size: 6 Fl Oz (Pack of 2), Style: Lotion
I bought this last summer and now it's my go-to. I love it. It absorbs quickly, is very easy to just smear on, and has a nice, very light scent. I wear it when I go running and I sweat like a maniac so that tells you something.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Possibly the best sunscreen on the US market
Size: 6 Fl Oz (Pack of 2), Style: Lotion
I'm a self-confessed sunscreen snob. I love trying new formulas, and I came to the conclusion years ago that US formulas aren't usually for me. We haven't had a new filter approved by the FDA since the last millennium, and our products reflect that. I can't tell you how many times I spent $40+ on 1.7oz of sunscreen that I ended up hating before I switched to mostly Korean sunscreens; and most of the US sunscreens I like can be described as "good...for a US formula."
In short, I didn't have high hopes for this, and I was very pleasantly surprised. This is a very, very good sunscreen even among non-US formulas. It's lightweight, doesn't make my oily skin shiny, and dries down entirely so it doesn't feel tacky or slimy. I can layer over and over throughout the day without pilling or streaks. It also comes in a huge tube for a very low price. The only possible downside is that it's fragranced, which isn't a deal breaker for me. I wish they still sold the 3oz facial version because it's travel-friendly, but from what I can tell, it's the same formula.
Try this, especially if you hate thick, heavy, shiny sunscreens. Unless you can't do fragrance, I think you will be very happy with it.
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Reviewed in the United States on August 4, 2025
★★★★★ 5
Favorite Sunscreen!
Size: 6 Fl Oz (Pack of 2), Style: Lotion
We absolutely love this SPF. It’s been our go-to for years. It does not make your skin feel sticky or crunchy. It goes on so smooth (like air!) and absorbs so well. It feels like the softest moisturizer. And it works! We get the two pack every summer. It’s also kinda hard to find. Amazon always comes through! Highly recommend.
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Reviewed in the United States on May 16, 2026
★★★★★ 5
Fave sunscreen!!
Size: 6 Fl Oz (Pack of 2), Style: Lotion
This is my absolute favorite sunscreen. It got my husband to finally start wearing sunscreen at work- it’s the only one he’ll wear.
The texture feels so smooth and lightweight on my skin and it covers very well. It also smells delicious.
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Reviewed in the United States on June 1, 2026