The Mastervolt AGM-SL SlimLine 12/150 (part number 63001500) is a 12V, 150Ah sealed AGM battery engineered for marine, RV, and powersports applications where space is at a premium. Its signature slim-line profile delivers up to 15% savings in both volume and weight compared to conventional wet cell batteries of the same capacity — making it one of the most space-efficient AGM batteries available.
Unlike traditional flooded batteries, the AGM-SL uses compressed Absorbed Glass Mat (AGM) technology, in which the electrolyte is fully absorbed into fiberglass matting. This sealed, valve-regulated construction means the battery is completely maintenance-free, produces no gas under normal operating conditions, and can be safely installed in virtually any position or enclosed space.
This is a true dual-purpose battery, capable of handling both engine starting and house/service loads. As a starter battery, it delivers high cold-cranking amps (490A DIN / 790A SAE) for reliable engine starts. As a house battery, it withstands repetitive cycling for onboard lighting, electronics, instrumentation, and entertainment systems. The low internal resistance enabled by AGM glass-fiber technology also supports faster recharging than conventional flooded batteries, with a maximum charge current of 43A.
Key Features:
- Dual-purpose design serves both starter and house/service battery functions
- Compressed AGM technology saves up to 15% in volume and 15% in weight vs. conventional batteries
- Minuscule footprint — two 150Ah SlimLine units fit in roughly the same space as a single traditional 8D battery
- Fully sealed, maintenance-free, and spill-proof — no need to add water
- Can be installed in virtually any position (except inverted) to maximize locker space
- Low 3% monthly self-discharge rate for reliable performance after winter storage
- Compatible with Mastervolt's 3-step Plus charging method
- Convenient M6 hex bolt terminal connections with slide-on plastic terminal covers
- Nominal voltage: 12V DC | Capacity: 150Ah (C20)
- Cold Cranking Amps: 490A (DIN) / 790A (SAE)
- Maximum charge current: 43A
- Dimensions (L x W x H, including terminals and handles): 22.0" x 4.3" x 11.0"
- Weight: 89 lbs
- Backed by a two-year manufacturer's warranty
The Mastervolt AGM-SL SlimLine 12/150 is the ideal solution for boaters, RV owners, and powersports enthusiasts looking to maximize amp-hour capacity within tight battery compartments without sacrificing starting power or cycling performance.
