Intellitec BIRD Bi-Directional Battery Isolator | 00-00839-000

Manage bidirectional battery charging on your RV with the Intellitec BIRD Bi-Directional Isolator Relay Delay (Part #00-00839-000). Genuine Intellitec OEM battery isolator control — intelligently manages charging between the coach battery and chassis battery in both directions (engine alternator → coach battery AND converter → chassis battery). Prevents unwanted battery cross-drain when neither battery is being charged. Plastic enclosure for under-hood mounting. 12V operation.

⭐ BIRD = Bi-Directional Isolator Relay Delay

Standout intelligent battery management functions the BIRD performs:

• Charges coach battery from engine alternator while driving
• Charges chassis battery from converter when coach is plugged into shore power
• Isolates batteries when neither is charging — prevents cross-drain
• Prevents generator-source overload — when generator is running, the isolator is prevented from pulling in to prevent generator and converter from operating chassis functions that might overload the converter

⭐ Voltage-Sensing Automatic Operation

Meaningful intelligent operation: BIRD senses voltage on both the coach and chassis batteries. When voltage on either battery is above 13.3 volts (indicating that battery is being charged), the BIRD closes the isolator relay, paralleling the batteries so both charge simultaneously.

• Bi-directional operation — charges either battery from whichever source is active
• Similar functions in each direction but operate at different thresholds for engine alternator vs converter charging
• Automatic isolation when charging stops — prevents inadvertent cross-drain

⭐ Prevents Battery Cross-Drain — Standout Protection

Meaningful protection feature: when neither battery is being charged, the BIRD keeps the batteries isolated from each other. This prevents:

• Coach loads from draining the chassis battery (leaving you unable to start the engine)
• Chassis loads from draining the coach battery (leaving you without house power)
• Meaningful protection for buyers who've experienced dead-battery frustrations from cross-drain scenarios

⭐ Generator Overload Protection

Standout intelligence: when the generator is running, the isolator is prevented from pulling in. Meaningful benefit:

• Prevents generator + converter from operating chassis functions that might overload the converter
• Protects the converter from beyond-spec current draw

What This Does

The BIRD is the intelligent battery management brain that operates in combination with a continuous-duty solenoid to connect the two batteries at the proper times for charging. It doesn't switch the battery current directly — it commands the solenoid to open or close based on voltage sensing.

⚠️ Requires Continuous-Duty Solenoid

Important system architecture note: the BIRD operates in conjunction with a continuous-duty solenoid. If your existing installation has a failed solenoid in addition to the BIRD, both components need to be functional for proper battery isolation and charging behavior.

Housing and Mounting

• Plastic enclosure
• Suitable for under-hood mounting
• Should be mounted out of direct water spray

Cross-Reference Part Numbers

• Manufacturer Part Number: 00-00839-000
• MPN Alternate: 839000

Electrical Specifications

• Voltage Rating: 12V
• Voltage Threshold: Closes isolator relay when either battery is above 13.3V

⚠️ Professional Installation Recommended

Installation involves 12V DC electrical wiring, voltage sensing lead connections to both coach and chassis batteries, and integration with the continuous-duty solenoid. Installation should be performed by a qualified RV service technician unless you have prior experience with RV battery isolation systems. Improper installation can result in charging system failures, battery cross-drain, or converter damage.

Genuine Intellitec OEM

Key Features

• Genuine Intellitec OEM BIRD (Bi-Directional Isolator Relay Delay)
• Manufacturer Part Number: 00-00839-000
• ⭐ Bi-directional charging — engine alternator → coach battery AND converter → chassis battery
• ⭐ Voltage-sensing automatic operation — closes at 13.3V on either battery
• ⭐ Prevents battery cross-drain when neither battery is charging
• ⭐ Generator overload protection — prevents isolator engagement when generator is running
• 12V operation
• Plastic enclosure — suitable for under-hood mounting
• ⚠️ Operates with continuous-duty solenoid (solenoid not included)

Specifications

• Brand: Intellitec
• Manufacturer Part Number: 00-00839-000
• MPN Alternate: 839000
• Type: RV Bi-Directional Battery Isolator Relay Delay (BIRD)
• Function: Manages bi-directional charging between coach and chassis batteries; prevents cross-drain
• Voltage Rating: 12V
• Activation Threshold: Closes isolator relay when coach or chassis battery > 13.3V
• Operating Companion: Requires continuous-duty solenoid (not included)
• Generator Protection: Prevents isolator engagement while generator is running
• Enclosure: Plastic (under-hood suitable, keep out of direct water spray)
• Warranty: Manufacturer's warranty