Victron Energy BCD 402 2 battery coupler with 40A Argo diodes enables safe parallel connection of two battery banks in solar systems, backed by 12-month warranty.
Victron Energy Battery Coupler BCD 402 2 – Reliable Battery Parallel Connection for Solar Systems
The Victron Energy Battery Coupler BCD 402 2 is a compact battery monitoring accessory that enables safe parallel connection of two batteries in solar and energy storage setups. It ensures balanced charging and discharging across both battery banks, maintaining system stability and extending battery life.
40A diode-based battery coupling for reliable current flow between two battery banks
Prevents reverse current flow, protecting batteries and connected equipment from damage
Compact and lightweight design at 0.582 kg, easy to install in any battery compartment
24-month manufacturer warranty provides long-term reliability for solar energy systems
What makes the Victron Energy BCD 402 2 stand out
Unlike simple battery switches, the BCD 402 2 uses Argo diodes to create a unidirectional current path, ensuring that batteries charge from the strongest source without interference. This makes it an essential component for off-grid and hybrid solar installations where multiple battery banks need to operate as a single unit.
Ideal for
Homeowners and installers managing off-grid solar systems with two separate battery banks that need to be charged from a single solar charge controller or inverter. Also suited for mobile and marine applications where space is limited and reliable battery management is critical.
Application of Victron Energy BCD 402 2
Connect the BCD 402 2 between the solar charge controller or inverter and the two battery banks
Ensure correct polarity and that both batteries are of the same type and capacity for balanced operation
The built-in 40A Argo diodes handle current distribution automatically — no additional control is needed
Mount in a dry, ventilated location near the battery bank for optimal thermal performance
Victron Energy is a Dutch manufacturer specializing in renewable energy equipment, including solar charge controllers, inverters, battery systems, and monitoring accessories. The brand is widely recognized in off-grid and marine solar applications for its robust, research-driven product engineering and extensive global distribution network.
It connects two battery banks in parallel for solar and energy storage systems, allowing them to be charged from a single source while preventing reverse current flow.
It works with any battery type when both connected batteries are of the same type and capacity. Consult the Victron Energy specification sheet for compatibility details with lithium, AGM, or gel batteries.
40A diode coupling capacity, 0.582 kg weight, 24-month manufacturer warranty, and Argo diode technology for unidirectional current flow.
One Victron Energy Battery Coupler BCD 402 2 unit. Mounting hardware and cables are not included and must be sourced separately.
Install between the charge controller or inverter and the battery banks, ensuring correct polarity. No regular maintenance is required beyond periodic visual inspection of connections.
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