By the PES Supply Editorial Team — Reviewed July 2026
Trojan Battery is the legacy US deep-cycle battery brand best known for the T-105 golf cart battery — the industry benchmark for deep-cycle flooded lead-acid performance for over 50 years. Founded in 1925 in Santa Fe Springs, California, Trojan now offers flooded lead-acid (FLA), AGM, gel, and lithium iron phosphate (LFP) chemistries across its Signature, Plus, and Lithium OnePack product lines. This guide covers Trojan's full battery lineup, certifications, warranty, and competitive positioning.
PES Supply carries Trojan Battery products among our catalog of 50,000+ SKUs from 169 authorized brands, with delivery in 7–10 business days. Browse our solar battery selection or shop Trojan at PES Supply.
1. Company Overview
Founded in 1925 and headquartered in Santa Fe Springs, California, Trojan Battery Company has been manufacturing deep-cycle batteries for nearly a century. The company is best known for its T-105 6V 225Ah flooded lead-acid battery, which has become the industry benchmark for golf cart and renewable energy applications. Trojan's Alpha Plus paste with T2 Technology and Maxguard T2 advanced separator are proprietary innovations that extend cycle life and reduce operating costs.
Trojan's market position is as the legacy deep-cycle battery brand with the broadest chemistry portfolio among US manufacturers. Unlike dedicated LFP brands, Trojan offers four chemistries (FLA, AGM, gel, LFP), allowing customers to match the battery to their application and budget. The company's RE (Renewable Energy) series is specifically engineered for solar and off-grid applications.
Trojan batteries are designed and assembled in the USA, with 99% recyclable materials. The company has expanded into lithium with its Lithium OnePack and GC2 48V lithium-ion product lines, bringing its deep-cycle engineering heritage to lithium chemistry.
2. Current Product Lines
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Signature Line (FLA) — The flagship flooded lead-acid deep-cycle line, featuring Alpha Plus paste with T2 Technology and Maxguard T2 separators. Models include:
- T-105: 6V, 225Ah (20-hr rate), 1.5 kWh per battery. The industry benchmark for golf carts, renewable energy, and floor machines. BCI Group GC2.
- T-105 Plus: Enhanced version with HydroLink compatibility.
- T-125, T-145: Higher-capacity 6V variants.
- T-605: 6V, 210Ah. Entry-level deep-cycle.
- Plus Series (FLA) — Features flip-top caps for easier watering and HydroLink single-point watering system compatibility.
- RE Series (Renewable Energy FLA) — Deep-cycle flooded batteries specifically engineered for solar and wind energy systems. Designed for daily deep cycling in off-grid and grid-tied renewable applications.
- AGM Line — Absorbed glass mat deep-cycle batteries including the TE35-AES (6V, 180Ah/210Ah C20). Maintenance-free, vibration-resistant, 2,500 cycles, 3-year warranty.
- Gel Line — Deep-cycle gel batteries (e.g., 24TMX 12V 77Ah). For applications requiring deep cycling with no maintenance.
- Lithium OnePack S2 (48V 105Ah) — 5.376 kWh LiFePO₄ battery for golf carts and mobility. IP67 rated. 10-year warranty. Up to 60 miles range per charge. Designed as a drop-in replacement for lead-acid GC2 batteries.
- GC2 48V Lithium-Ion — 48V lithium golf cart battery (30Ah) with LFP chemistry. 8-year warranty. Proven 45–60 mile range. SAE vibration tested. IP67 rated. UL, SAE, ETL, FCC, CE certified.
3. Recent Releases (2025–2026)
- Lithium OnePack S2 (48V 105Ah) — Trojan's flagship lithium product, setting the bar for lithium performance with long-range (up to 60 miles per charge), maintenance-free operation, and a 10-year warranty. IP67 ingress protection. 5.376 kWh capacity.
- GC2 48V Lithium-Ion — Marketed as "The Beast," this GC2-format 48V lithium battery offers proven 45–60 mile range — up to 15% farther than competing GC2 lithium-ion batteries. Backed by an 8-year warranty. Meets SAE vibration tests and international safety standards (UL, SAE, ETL, FCC, CE).
- Charger compatibility — Trojan's lithium GC2 batteries charge in 2–4 hours and are compatible with all leading charger brands, including the Lester Summit II with lithium charge profile.
4. Certifications & Listings
- UL — Trojan's lithium products meet UL safety standards at the cell level.
- SAE — Trojan GC2 lithium batteries meet SAE vibration test standards for off-road durability.
- ETL, FCC, CE — International safety and electromagnetic compatibility certifications for lithium products.
- UN 38.3 — Transport safety certification for lithium battery shipping.
- BABA compliance — As a US manufacturer (Santa Fe Springs, California), Trojan Battery products are well-positioned for Build America, Buy America (BABA) compliance on federally funded projects.
- 99% recyclable — Trojan's lead-acid batteries are 99% recyclable through established closed-loop recycling.
5. Warranty & Cycle Life
Trojan's warranty terms vary by chemistry and product line:
- T-105 Signature Line (FLA): 1-year manufacturer's warranty. 1,200+ cycles with proper maintenance. 225Ah at 20-hr rate, 250Ah at 100-hr rate.
- AGM (TE35-AES): 3-year warranty or 1,200 cycles (at 80% capacity retention). Up to 2,500 cycles, 10,000 hours of operation.
- Lithium OnePack S2: 10-year warranty. 10+ years design life. Up to 60 miles range per charge.
- GC2 48V Lithium-Ion: 8-year warranty. Lasts 2–3 times longer than lead-acid golf cart batteries. Field tested for 100,000+ hours.
Trojan's deep-cycle FLA batteries, with proper maintenance (watering, equalization, avoiding deep discharge below 50%), can last several years. The Alpha Plus paste with T2 Technology and Maxguard T2 separator are engineered to extend cycle life and sustain performance longer than standard deep-cycle batteries.
6. Popular Products at PES Supply
| Model | Capacity | Voltage | Chemistry | Cycle Life | Price Range |
|---|---|---|---|---|---|
| Trojan T-105 | 225Ah (1.5 kWh) | 6V | FLA | 1,200+ cycles | $150–$250 |
| Trojan T-125 | 240Ah | 6V | FLA | 1,200+ cycles | $180–$300 |
| Trojan TE35-AES (AGM) | 180Ah (210Ah C20) | 6V | AGM | 2,500 cycles | $300–$500 |
| Trojan Lithium OnePack S2 | 105Ah (5.376 kWh) | 48V | LFP | 10+ years | $2,500–$4,000 |
| Trojan GC2 48V Lithium | 30Ah | 48V | LFP | 8-year warranty | $1,500–$2,500 |
7. Technical Comparison
| Metric | Trojan T-105 (FLA) | Crown CR-GC150 (FLA) | Trojan OnePack S2 (LFP) | EG4 LifePower4 (LFP) |
|---|---|---|---|---|
| Chemistry | Flooded Lead-Acid | Flooded Lead-Acid | LiFePO₄ | LiFePO₄ |
| Capacity | 225Ah / 1.5 kWh | 150Ah / 1.8 kWh | 105Ah / 5.376 kWh | 100Ah / 5.12 kWh |
| Voltage | 6V | 12V | 48V | 51.2V |
| $/kWh (upfront) | ~$100–$167 | ~$110–$194 | ~$465–$744 | ~$235–$285 |
| Cycle life | 1,200+ cycles | 1,200+ cycles | 10+ years | 6,000+ cycles |
| Maintenance | Watering required | Watering required | Maintenance-free | Maintenance-free |
| Weight (per kWh) | Heaviest | Heavy | Lighter | Lighter |
Trojan's advantage is brand legacy and the broadest chemistry portfolio: the T-105 is the industry benchmark for FLA deep-cycle performance, and Trojan now offers LFP alternatives (OnePack S2, GC2 48V) for customers ready to upgrade. The trade-off is that Trojan's LFP pricing is higher per kWh than dedicated LFP brands like EG4, and FLA batteries require ongoing maintenance.
8. BMS & Monitoring
- FLA/AGM/Gel: No BMS — lead-acid batteries do not require electronic management. Use a compatible charge controller or inverter with the appropriate lead-acid charge profile. Trojan recommends temperature-compensated charging for AGM (5mV per cell per °C).
- Lithium OnePack S2 / GC2 48V: Built-in BMS with cell balancing, short-circuit protection, over-current protection, and thermal self-protection. The BMS self-protects against short circuits and overheating using redundant safety features.
- Monitoring (lithium): Trojan's lithium GC2 batteries feature on-battery status indicators and an optional dashboard battery gauge for real-time battery life monitoring.
- HydroLink (FLA): Trojan's Plus Series and Signature Line batteries are compatible with the HydroLink single-point watering system, making maintenance simple, safe, and fast.
9. Installation Notes
- Orientation: FLA batteries must be placed upright at all times — electrolyte will spill if tilted. AGM, gel, and lithium batteries are non-spillable and can be placed on their side.
- Venting: FLA batteries produce hydrogen and oxygen gas during charging and require ventilation via vent caps. AGM, gel, and LFP batteries are sealed and require no active venting.
- Temperature range: FLA: -20°C to +45°C (storage at full charge). AGM: -40°C to +60°C operating. Lithium OnePack S2: -20°C to +60°C (-4°F to 140°F). GC2 48V lithium can be stored up to 12 months in recommended conditions.
- Maintenance (FLA): Check electrolyte levels regularly by removing vent caps. Add only distilled or deionized water — tap water contains contaminants that damage the battery. Fully charge before adding water. Compatible with HydroLink single-point watering system.
- Charging (AGM): Always use temperature-compensated charging (5mV per cell per °C). Select proper battery type (AGM or gel) on charger. Boost charge at constant voltage of 2.2V/cell with current limited to 20% of C20.
- Terminal types: Trojan T-105 is available with four terminal configurations (ELPT, EHPT, EAPT, EUT) to fit various applications.
- Charging (lithium): Trojan's GC2 48V lithium charges in 2–4 hours and is compatible with all leading charger brands. Use a charger with a lithium charge profile (e.g., Lester Summit II).
10. Frequently Asked Questions
What is the Trojan T-105 and why is it so popular?
The Trojan T-105 is a 6V, 225Ah flooded lead-acid deep-cycle battery that has become the industry benchmark for golf carts, renewable energy, floor machines, and marine applications. Its popularity stems from its Alpha Plus paste with T2 Technology (maximum sustained performance), Maxguard T2 advanced separator (longer performance, lower operating costs), rugged polypropylene case, and 99% recyclability. It is designed and assembled in the USA.
Can I replace my Trojan lead-acid batteries with Trojan lithium?
Yes. Trojan's Lithium OnePack S2 (48V 105Ah, 5.376 kWh) and GC2 48V lithium-ion batteries are designed as drop-in replacements for lead-acid GC2 batteries in golf carts and mobility applications. Lithium offers 2–3x longer life, faster charging (2–4 hours), zero maintenance, and up to 60 miles range. Ensure your charger supports a lithium charge profile before switching.
How long do Trojan flooded lead-acid batteries last?
With proper maintenance (regular watering, equalization charges, avoiding discharge below 50% DoD), Trojan T-105 batteries typically deliver 1,200+ cycles and several years of service. The Alpha Plus paste and Maxguard T2 separator are engineered to extend cycle life and sustain performance longer than standard deep-cycle batteries. Low self-discharge (5–15% per month) helps maintain charge between uses.
What is the difference between Trojan FLA and AGM batteries?
Trojan's flooded lead-acid (FLA) batteries use liquid electrolyte, require periodic watering, must be kept upright, and offer the lowest upfront cost. Trojan's AGM (Absorbed Glass Mat) batteries use a glass mat to absorb electrolyte, are maintenance-free, spill-proof, vibration-resistant, can be mounted on their side, and offer longer cycle life (2,500 cycles vs 1,200+). AGM costs more upfront but reduces maintenance labor.
Are Trojan batteries made in the USA?
Yes. Trojan Battery Company designs and assembles its batteries in the USA, headquartered in Santa Fe Springs, California. The company has been manufacturing deep-cycle batteries for nearly a century. As a US manufacturer, Trojan products are well-positioned for Build America, Buy America (BABA) compliance on federally funded projects.
11. Shop Trojan Battery at PES Supply
PES Supply carries Trojan Battery FLA, AGM, gel, and lithium deep-cycle batteries among our 50,000+ SKUs from 169 authorized brands. Delivery in 7–10 business days.
Explore our full solar battery collection or contact our team for Trojan battery sizing, chemistry selection, and HydroLink watering system guidance.