Balmar Digital Duo Charge 12/24V Battery Combiner

The Balmar Digital Duo Charge (DDC-12/24) provides a "hands off" solution for charging two battery banks without the use of problematic isolators or manual battery switches. It is designed for boaters who want automatic engagement — during charging, the DDC-12/24 monitors voltage at the house battery and engages once voltage exceeds the set minimum.

Once triggered (typically 13.2V in a 12V system or 26.4V in a 24V system), the DDC-12/24 provides up to 30A charge current to the starting battery. When no charge source is present, it separates the batteries so the starting battery won't be accidentally discharged into the house battery, with an optional solenoid control enabling higher start battery charging output when required. Browse more options in our alternators and charging hardware category.

Key Features

• 12/24V
• solid-state combiner
• up to 30A charge current
• automatic engagement
• Max Charge Current: 30A
• Weight: 1 lb

Frequently Asked Questions

What does this device eliminate the need for? Isolators, relays, or manually operated battery switches.

How much current can this device deliver to the starting battery? Up to 30A.

What prevents accidental battery discharge? Automatic separation when no charge source is present.

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.