Interstate SLA1195 120Ah 12V AGM Deep-Cycle Battery

The Interstate SLA1195 120Ah 12V AGM Battery is a sealed, maintenance-free 12V AGM deep cycle battery rated at 120Ah, built on VRLA Absorbent Glass Mat technology for reliable deep-discharge performance across a wide range of stationary and mobile applications. Suited for solar energy storage, golf carts, RV, marine, and home backup use, it delivers substantial capacity in a spill-proof, valve-regulated package designed for both cyclic and standby service.

Key specifications

• Voltage / Capacity: 12V nominal / 120Ah (20-hr rate to 1.75V/cell)
• Chemistry: AGM VRLA sealed lead-acid — maintenance-free, spill-proof, no venting or watering required
• Dimensions / Weight: 12.91 × 6.77 × 8.46 in. (328 × 172 × 215 mm) / 67.24 lbs. (30.5 kg)
• Operating temperature: -40°F to 140°F (-40°C to 60°C); optimal charge range 32°F–104°F (0°C–50°C)
• Self-discharge: Retains 91% capacity at 3 months; 82% at 6 months — suitable for seasonal storage

High capacity without the maintenance

Flooded lead-acid batteries in high-capacity installations require periodic water top-offs, dedicated venting, and forced upright mounting — constraints that make them impractical in RV bays, boat holds, and enclosed solar cabinets. The SLA1195's VRLA AGM construction seals the electrolyte in fiberglass mat separators, eliminating all three without sacrificing capacity or sustained discharge performance. Nut-and-bolt terminals provide solid, low-resistance connections built to handle the high continuous currents common in solar arrays and backup inverter systems.

Key Applications

• Solar off-grid ESS: Primary house battery for small off-grid energy storage systems, pairing with 12V MPPT or PWM charge controllers in cabin, remote site, and van-build solar installations requiring reliable 120Ah AGM deep cycle storage.
• Golf carts: Provides deep-cycle capacity for electric golf carts and low-speed vehicles in high-cycle daily use environments where a maintenance-free, sealed battery is preferred over flooded alternatives.
• RV house loads: Powers lights, appliances, and onboard systems in motorhomes and travel trailers without the venting requirements or water maintenance that flooded batteries demand in confined compartments.
• Marine house battery: Sealed VRLA construction handles vibration and occasional non-level operation aboard boats, making it well suited for house loads, navigation electronics, and trolling systems.
• Home backup and UPS: Functions as a storage bank in inverter-based home backup systems where substantial Ah capacity is needed to sustain loads through extended outages or grid interruptions.

Efficient construction and transport certification

• Approved for all modes of transport: Certified for air, sea, road, and rail transport — a practical advantage for dealers, installers, and buyers who need to freight the battery to remote cabins, marine facilities, or off-grid installation sites.
• Enhanced plate-to-terminal connections: Internal construction optimizes the electrical path between plates and terminals, contributing to a low 4.2 mΩ internal resistance that reduces voltage sag under sustained high-current discharge.

Charging specs and system wiring

The SLA1195 uses nut-and-bolt terminals, requiring ring terminals and hardware rated for the system's current demand. It is compatible with any 12V solar charge controller — PWM or MPPT — set to an AGM charge profile: float voltage 13.6–13.8V, cycle charge voltage 14.6–14.8V, maximum charge current 36A. Multiple units can be wired in series to build 24V or 48V battery banks, or in parallel to increase total Ah capacity at 12V — size your wiring and fusing to match the combined current capacity of the bank.

Why choose the Interstate SLA1195?

The Interstate SLA1195 is a practical choice for buyers who need a high-capacity 12V AGM deep cycle battery without the maintenance overhead of flooded alternatives — whether for a solar off-grid cabin, a boat with heavy house loads, or a home inverter bank. Its nut-and-bolt terminals, low internal resistance, and transport certification make it a dependable fit for demanding installations where connection quality and logistics both matter. Available through A1 SolarStore, it is backed by Interstate's 6-month free replacement limited warranty from date of purchase.