---
product_id: 31393521
title: "Blue Sea 7620 ML-Series Automatic Charging Relay (Magnetic Latch) 12VDC, default title"
brand: "blue sea systems"
price: "€ 469.61"
currency: EUR
in_stock: true
reviews_count: 8
category: "Blue Sea Systems"
url: https://www.desertcart.gr/products/31393521-blue-sea-7620-ml-series-automatic-charging-relay-magnetic-latch
store_origin: GR
region: Greece
---

# 500A heavy-duty current rating Marine-grade weatherproof durability Automatic dual battery bank management Blue Sea 7620 ML-Series Automatic Charging Relay (Magnetic Latch) 12VDC, default title

**Brand:** blue sea systems
**Price:** € 469.61
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay charged, stay ready — the ultimate dual battery guardian!

## Quick Answers

- **What is this?** Blue Sea 7620 ML-Series Automatic Charging Relay (Magnetic Latch) 12VDC, default title by blue sea systems
- **How much does it cost?** € 469.61 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/31393521-blue-sea-7620-ml-series-automatic-charging-relay-magnetic-latch)

## Best For

- blue sea systems enthusiasts

## Why This Product

- Trusted blue sea systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Silent Efficiency:** Magnetic latching relay uses minimal power while maintaining reliable operation with minimal voltage loss.
- • **Smart Battery Sync:** Automatically balances charging between two large battery banks to maximize battery life and readiness.
- • **Marine-Grade Toughness:** Built weatherproof to withstand harsh marine and RV environments without fail.
- • **Powerhouse Performance:** Handles up to 500 amps for seamless high-current switching.
- • **Remote Control Convenience:** Includes ML-Series Contura remote switch for easy manual override and monitoring from your dashboard.

## Overview

The Blue Sea 7620 ML-Series Automatic Charging Relay is a 12V, 500A marine-grade relay designed to automatically manage and equalize charging between two large battery banks. Featuring a magnetic latching mechanism for low power consumption and minimal voltage loss, it includes a remote control switch for manual operation. Ideal for RVs and boats, it ensures longer battery life and reliable power availability even in demanding environments.

## Description

Includes ML-Series Remote Control Contura Switch PN 2146 Automatically manages the charging of two large battery banks.

Review: Top notch quality. - High quality latching relay, weather proof, marine quality. Reason I only gave it a 4 star install rating is because putting in the remote switch takes some work and minor wiring knowledge, otherwise if you don’t need the remote this is a simple attach to a solid surface, add two heavy gauge battery wires and ground it and it instantly goes to work. When I first installed this relay on my RV coach, one battery bank was lagging in staying charged. Within a few hours, while installing the remote switch and fishing the wires thru, both battery banks were equalized at 13.5 vts. Magnetic latching, uses very little power doing this. It does make a loud “thunk”when switching. I installed a thick piece of rubber backing on the wall behind it to lessen the noise.
Review: Perfect Answer to Fully Charging Dual Batteries!!!! - The product gets 5 stars plus. It is fantastic and solves the problem of diode based isolators in so many motorhomes and boats. If you want a full charge on your motorhome and boat batteries, throw the diode isolator away and use this solenoid switch with dash mounted switch (provided). You get automatic connection or isolation of batteries, manual isolation or manual connection. It has all the delays programmed in and will not connect defective batteries. It does more than you could expect by having 2 engineers onboard to manage your battery charging. It works with both self excited and remote sensing alternators where diode isolators require remote sensing to get close to a normal charge. No loss of voltage across the diodes (.7 volts of 12.6 volts. Batteries will last longer and you'll have a full charge from either the alternator or the on-board charge. Even connects when solar charge occurs.

## Features

- Includes ML-Series Remote Control Contura Switch PN 2146
- Automatically manages the charging of two large battery banks
- Allows paralleling of battery banks for emergency starting

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001C7CJHC |
| Best Sellers Rank | #113,132 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #34 in Boat Battery Switches |
| Brand | Blue Sea Systems |
| Brand Name | Blue Sea Systems |
| Coil Voltage | 12 Volts |
| Connector Type | Screw |
| Contact Current Rating | 500 Amps |
| Contact Material | Silver Alloy |
| Contact Type | Normally Open |
| Current Rating | 500 Amps |
| Customer Reviews | 4.4 out of 5 stars 21 Reviews |
| Global Trade Identification Number | 00632085076207 |
| Included Components | Blue Sea Systems 7620 SOLENOID ML SERIES 500A 12V ACR |
| Item Type Name | Blue Sea Systems 7620 SOLENOID ML SERIES 500A 12V ACR |
| Item Weight | 1.9 Pounds |
| Manufacturer | Blue Sea Systems |
| Model | 7620 |
| Mounting Type | Surface Mount |
| Number of Terminals | 2 |
| Operation Mode | Automatic |
| Part Number | 7620 |
| Specification Met | [Industry Standard] |
| UPC | 632085076207 |
| Unit Count | 1.0 Count |
| Warranty Description | Warranty |
| Wattage | 50 watts |

## Product Details

- **Connector Type:** Screw
- **Contact Material:** Silver Alloy
- **Contact Type:** Normally Open
- **Current Rating:** 500 Amps
- **Mounting Type:** Surface Mount

## Images

![Blue Sea 7620 ML-Series Automatic Charging Relay (Magnetic Latch) 12VDC, default title - Image 1](https://m.media-amazon.com/images/I/81sBGL6Ft+L.jpg)
![Blue Sea 7620 ML-Series Automatic Charging Relay (Magnetic Latch) 12VDC, default title - Image 2](https://m.media-amazon.com/images/I/91OWCu8nyLL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Top notch quality.
*by J***K on October 28, 2023*

High quality latching relay, weather proof, marine quality. Reason I only gave it a 4 star install rating is because putting in the remote switch takes some work and minor wiring knowledge, otherwise if you don’t need the remote this is a simple attach to a solid surface, add two heavy gauge battery wires and ground it and it instantly goes to work. When I first installed this relay on my RV coach, one battery bank was lagging in staying charged. Within a few hours, while installing the remote switch and fishing the wires thru, both battery banks were equalized at 13.5 vts. Magnetic latching, uses very little power doing this. It does make a loud “thunk”when switching. I installed a thick piece of rubber backing on the wall behind it to lessen the noise.

### ⭐⭐⭐⭐⭐ Perfect Answer to Fully Charging Dual Batteries!!!!
*by R***M on May 13, 2012*

The product gets 5 stars plus. It is fantastic and solves the problem of diode based isolators in so many motorhomes and boats. If you want a full charge on your motorhome and boat batteries, throw the diode isolator away and use this solenoid switch with dash mounted switch (provided). You get automatic connection or isolation of batteries, manual isolation or manual connection. It has all the delays programmed in and will not connect defective batteries. It does more than you could expect by having 2 engineers onboard to manage your battery charging. It works with both self excited and remote sensing alternators where diode isolators require remote sensing to get close to a normal charge. No loss of voltage across the diodes (.7 volts of 12.6 volts. Batteries will last longer and you'll have a full charge from either the alternator or the on-board charge. Even connects when solar charge occurs.

### ⭐⭐⭐⭐⭐ Good heavy duty dual battery switch.
*by H***Y on June 17, 2020*

This switch is heavy and robustly built. I used it for a custom dual battery installation on my 4x4. If it’s good enough for out on the water use it’s good enough for my build. I like the flexibility of having the switch available on my dash to see the batteries tie in automatically or the option to tie in manually. It is on the pricey side, but I’m fairly certain it’s going to last quite a long time.

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---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-07-13*