Welcome to Harbor Supply - Your Ultimate Marine Supplier! | Call Us at 888-296-6432

SAME DAY SHIPPING - PLACE YOUR ORDER BY 4PM EST

Bluewater Auto Charging Relay 12V - 140 AMP [9800-7101-00]

Bluewater  |  SKU: HS-111083
$77.91

Payment
  • Credit Cards: We accept major credit cards, including Visa, Mastercard, American Express, and Discover.
  • Apple Pay & Google Pay: Simplify your checkout process using these digital wallets.
  • Shop Pay: For faster checkouts and secure payment processing.

Shipping

Ground, 2nd Day Air and Next Day Air available ! Same Day Shipping if your order is placed by 4pm Eastern

Returns

At Harbor Supply, we aim to ensure you’re completely satisfied with your purchase. If you need to return an item, you have 90 days from the date of delivery to initiate a return.

Eligibility for Returns:

To be eligible for a return:

  • The item must be in its original condition—unused, unworn, with all tags still attached, and in its original packaging.
  • You’ll need the receipt or proof of purchase.

Please note, returns must be authorized before sending any items back. Items returned without prior authorization will not be accepted.

Description

Auto Charging Relay 12V - 140 AMP

The automatic charging relay (ACR) automatically manages battery charging to ensure maximum efficiency and protect your batteries.

Features:

  • Automatic battery management – connects batteries during charging and isolates them when the voltage drops
  • Start Isolation (SI) – protects sensitive electronics during engine cranking by temporarily disconnecting house loads (indicated by a slow-flashing yellow LED)
  • High-output support – compatible with alternators up to 120 A
  • Dual-color LEDs – provide real-time battery status: Fault, Charging, Discharging, Combine, SI, and Override modes
  • Under Voltage Lockout – prevents the relay from closing when battery voltage is too low (9.5V for 12V systems, 19V for 24V systems)
  • Durable design – IP67 waterproof, ignition protected, safe for marine and RV applications

Specifications:

  • Continuous Rating: 120 Amps
  • Intermittent Rating: 140 Amps
  • Max Voltage: 48VDC
  • Cable Size: 4/0 AWG

Applications:

  • Boats – dual battery systems (starter + house)
  • Sailboats – navigation and lighting batteries
  • Fishing boats – trolling motor and accessory battery protection

Specifications:

  • Continuous Amperage: 120
  • Box Dimensions: 3"H x 6"W x 9"L WT: 0.85 lbs
  • UPC: 810196331235

Quick Guide (pdf)
Brochure (pdf)

Shop By Category