Balmar 24V 70A 60 Series Alternator, 4in Saddle Mount, Isolated Ground (No Pulley)

High-Output 24V 70A Isolated Ground Alternator for Marine and Off-Grid Power

Upgrade your charging system with the 60 Series 24V 70A Alternator, a compact, high-output alternator from Balmar's 6-Series. Balmar designs its 6-Series alternators for recreational applications and describes them as ideal for modest charging upgrades. It delivers dependable 24V charging for auxiliary battery banks in marine vessels and off-grid vehicles.

Why Choose an Isolated Ground Architecture?

Electrical safety and hull protection are critical in marine applications. This alternator features an Isolated Ground (IsoGrd) design, meaning the negative return path is completely insulated from the alternator case and the engine block. This architecture significantly reduces the risk of stray current corrosion on metal hulls, underwater hardware, and propulsion components.

4in J-180-Style Dual Foot Saddle Mounting

This 60 Series unit uses a 4in (approx. 101.6mm) dual foot saddle mount, which Balmar calls J-180-style (604 Series) and lists as typical for Caterpillar, Cummins, Detroit Diesel and John Deere engines. Compared to single-foot alternatives, a wide saddle mount distributes belt tension across the mounting bracket, helping maintain belt alignment.

Key Features and Benefits

• 70A at 24V Output: Provides substantial charging power to efficiently replenish high-capacity house battery banks.
• Isolated Ground Terminal: Helps protect marine vessels from galvanic and stray current corrosion by keeping the electrical ground independent from the engine block.
• 4in (Approx. 101.6mm) Saddle Mount: J-180-style dual-foot mount for engines with a 4in saddle bracket.
• Compact 60 Series Small Case: Fits comfortably inside tight engine compartments where space is limited without sacrificing high-output performance.
• Customisable Drive Setup: Supplied without a pulley, allowing you to match the exact belt profile and drive ratio required by your engine.

Important Exclusion: Pulley Required

Please note that this alternator is supplied without a pulley to accommodate a wide variety of engine belt configurations. To complete your installation, select one of the compatible 17mm bore pulleys listed below based on your specific drive belt setup:

• B-61-0020: Pulley, Dual V 2.7in x 1/2in (Approx. 68.6mm x 12.7mm) DeepV, 17mm Bore
• B-61-0070: Pulley, K-6 2.45in (Approx. 62.2mm) Serpentine 6-Rib, 17mm Bore
• B-1310: Pulley, K-8 2.4in (Approx. 61mm) Serpentine 8-Rib, 17mm Bore, Short (STD)

Cooling and Regulation

Standard factory alternators often struggle with thermal management when paired with modern deep-cycle AGM, gel or lithium (LiFePO4) battery systems that demand high bulk-charging currents. Balmar's 6-Series alternators use dual fan cooling and a high airflow frame. For 24V applications, Balmar specifies a Max Charge multi-stage regulator.

Configure Your High-Output Charging System

Ensure dependable 24V power generation on the water or in the field. Pair this 60 Series isolated ground alternator with your required 17mm bore pulley and add it to your system build today.