Trojan Solar SAES-12-205 LT 179Ah 12V Off-Grid Solar & Renewable Energy Battery

Trojan's SAES-12-205 features proprietary Advanced Energy Storage (AES) technology delivering up to 3x the cycle life of standard AGM batteries—validated at 1,200 cycles at 100% depth of discharge versus 400 cycles for conventional AGM. The "S" in SAES stands for Solar—this specialized 12V maintenance-free sealed AGM battery is specifically engineered to handle the unpredictable charging patterns that solar and wind systems create. It maintains high capacity in extreme deep cycling (up to 100% DoD), challenging temperatures, and partial charging conditions. Its non-spillable VRLA construction allows versatile mounting options and operates in extreme temperatures from -40°F to 160°F (-40°C to 71°C). The sealed AGM design requires no watering or electrolyte checks, making it ideal for off-grid applications where maintenance access is impractical. With 179Ah capacity (159Ah at 10-hour rate) and 2.10 kWh total energy output, the SAES-12-205 delivers proven reliability with an 8 year IEC 61427 life rating for renewable energy storage, backup power systems, marine house banks, RVs, telecommunications equipment, and remote installations where reliability is critical.

Key applications

• Off-grid solar systems – remote cabins, tiny homes, and residential solar installations requiring deep-cycle power throughout the night with variable weather conditions.
• Renewable energy storage – primary energy storage for solar and wind systems requiring dependable performance in partial state of charge conditions.
• Emergency backup power – UPS systems for homes, businesses, and critical facilities requiring extended runtime during grid outages.
• Remote monitoring and telecommunications – towers, data collection systems, and monitoring equipment in locations with infrequent service access.
• Marine house banks – deep-cycle power for boats and yachts requiring sealed, non-spillable batteries in living spaces.
• RV and motorhome systems – house power for refrigeration, electronics, lighting, and entertainment during extended off-grid adventures.
• Remote industrial installations – monitoring equipment, pumping systems, and installations requiring reliable solar-powered operation.
• Rural electrification – residential and commercial installations providing renewable energy where grid power is unavailable or unreliable.

Design & construction

• Sealed AGM (Absorbed Glass Mat) solar chemistry with proprietary Advanced Energy Storage (AES) technology optimized specifically for renewable energy applications.
• AES technology delivers 3x the cycle life of standard AGM batteries—1,200 cycles at 100% depth of discharge validated versus 400 cycles for conventional AGM.
• Superior Partial State of Charge (PSoC) performance maintains high capacity during cloudy weather, deep overnight discharges, and irregular charging patterns.
• Maintenance-free sealed VRLA design requires no watering or electrolyte checks—ideal for remote installations with infrequent access.
• Non-spillable construction allows versatile mounting options and safe indoor installation without gas venting or acid leakage.
• Extended temperature range from -40°F to 160°F (-40°C to 71°C) for reliable operation from arctic cold to desert heat.
• Heavy-duty internal components with advanced plate chemistry and low internal resistance for stable voltage output.
• L-Terminal (LT) configuration provides robust connections for heavy-duty solar system cabling.
• Low self-discharge rate (less than 3% per month) maintains charge during extended storage or low-use periods.
• 8 year IEC 61427 life rating for long-term renewable energy reliability.
• Safe for indoor installation in living spaces—no dangerous fumes or acid spills.

Technical specifications

Capacity: 179 Ah at 20-hour rate (159 Ah at 10-hour, 216 Ah at 100-hour)
Voltage: 12V
Energy: 2.10 kWh
Weight: Approximately 125-131 lbs (57-59 kg)
Dimensions (L x W x H): 14.97" x 6.94" x 14.07" (380 x 176 x 357 mm)
Group Size: Large format 12V
Chemistry: Sealed AGM (Absorbed Glass Mat) deep-cycle solar battery with AES technology
Terminal Type: LT (L-Terminal threaded insert terminals)
Product Line: Trojan Solar AES Line
Battery Type: Maintenance-free sealed AGM solar deep-cycle battery
Cycle Life: 1,200 cycles at 100% depth of discharge; 8 year IEC 61427 life rating
Self-Discharge: Less than 3% per month for extended storage capability
Operating Temperature: -40°F to 160°F (-40°C to 71°C)
Warranty: Three-year warranty (confirm with regional Trojan/reseller)
Recyclability: 99% recyclable
Special Features: Maintenance-free, non-spillable, AES technology, solar-optimized for PSoC operation, extreme temperature capability, IEC 61427 certified

Installation & handling

• Maintenance-free sealed design requires zero upkeep—no watering, no terminal cleaning, no electrolyte level checks—ideal for remote installations.
• Non-spillable VRLA construction allows versatile mounting options for flexible installation in solar enclosures, boats, RVs, and equipment shelters.
• Safe for indoor installation in living spaces and facilities—no dangerous acid fumes or spill risks.
• L-Terminal configuration provides robust, heavy-duty connections for high-current solar system cabling.
• Extreme temperature capability (-40°F to 160°F) enables reliable operation in harsh climates from arctic environments to extreme heat.
• AES technology specifically optimized for partial state of charge conditions—perfect for solar systems with variable weather and deep discharge cycles.
• Use a compatible 12V solar/AGM charge controller or charger with proper AGM charging profile to maximize performance and service life.
• Ideal for applications requiring maximum reliability, extended autonomy, and minimal maintenance in off-grid or critical installations.
• Heavy-duty internal construction withstands extreme deep cycling up to 100% depth of discharge.
• Heavy battery—ensure proper handling equipment and secure mounting for safe installation.