# Solar battery Trojan T1275-AGM 12V 140Ah AGM ![Solar battery Trojan T1275-AGM 12V 140Ah AGM](https://baterias.com/614-home_default/battery-trojan-t1275-agm-12v-270a.jpg) > Trojan T1275-AGM solar battery 12V 140Ah AGM. AGM RELIANT range. Dimensions 329×179×278 mm. Designed for PV systems with daily cyclic loads. **Category:** [Batteries for Solar Applications](https://baterias.com/gb/batteries-for-solar-applications) → [TROJAN](https://baterias.com/gb/trojan) - **Canonical URL**: https://baterias.com/gb/battery-trojan-t1275-agm-12v-270a - **Language**: en-GB - **Brand**: TROJAN - **Reference**: BCOM-TROJAN-T1275-AGM - **MPN**: T1275-AGM - **Price**: 681,60 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | TROJAN | | Reference | T1275-AGM | | Model | TROJAN AGM RELIANT | | Voltage (V) | 12 V | | Largo | 329 mm | | Ancho | 179 mm | | Alto | 278 mm | | Peso | 37 kg | | Tecnología | AGM | | Terminal type | 5 8 15 | | Capacity (C20) | 140 Ah (c20) | | Capacity (C5) | 112 Ah (c5) | ## Quick description **Trojan T1275-AGM 12V 140Ah** is a solar battery designed for PV systems with daily charge/discharge cycles. Tolerates extreme temperatures well, with low self-discharge during winter shutdowns or between stays at vacation homes. ### Why this solar battery? - **Designed for solar systems** optimised for daily charge/discharge cycles - **Handles extreme temperatures** in technical rooms or outdoor installs - **Minimal self-discharge** when left idle over winter or holidays 🔌 Voltage 12 V ⚡ Capacity 140 Ah C20 📏 Dimensions 329×179×278 mm ⚙️ Technology AGM ⚖️ Weight 37 kg 🏷️ Model TROJAN AGM RELIANT ## Description ## Solar battery Trojan T1275-AGM AGM Reliant 140Ah 12V 12*V* Voltage 140*Ah* Capacity 37*kg* Weight The **Trojan T1275-AGM** with AGM technology stores **140 Ah** at **12 V** for off-grid photovoltaic installations and storage systems. Its 329 × 179 × 278 mm make it the exact replacement for the 140 Ah battery fitted as standard to many off-grid PV systems. - Low self-discharge during the darker months. - AGM: faster recharging and better cycle resistance than a conventional battery. - Compatible with common MPPT and PWM controllers. - Maintenance-free in off-grid installations. ### What the Trojan T1275-AGM is for With 140 Ah, the Trojan T1275-AGM stores the energy from your panels for the night and cloudy days. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 37 kg and 5 8 15 terminals. ### Will it fit your current battery tray? The Trojan T1275-AGM is made in the 329 × 179 × 278 mm format and weighs 37 kg. It uses 5 8 15 terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### Trojan: the maker behind the T1275-AGM Trojan Battery is the world reference in deep-cycle batteries: golf carts, cleaning machines, aerial platforms and solar systems rely on its T2 technology and longevity. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### The Trojan T1275-AGM: AGM Reliant range and AGM technology The **AGM Reliant** is the Trojan range the T1275-AGM belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle. AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly. ### Usage and maintenance tips In the darker months, check the voltage periodically and avoid full discharges. Size the installation so as not to discharge the battery more than 50% daily and set the controller to the battery technology. ### Warranty and coverage The Trojan T1275-AGM comes with the **manufacturer's official warranty** against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you. ### Shipping, delivery and returns Same-day dispatch from our warehouse for in-stock orders placed **before [[ks:cutoff]]**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **[[ks:return_days]] days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### Is the Trojan T1275-AGM an AGM battery and what are the benefits of AGM? Yes. The T1275-AGM from Trojan uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for devices with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### How is the Trojan T1275-AGM battery installed in the vehicle? In most devices it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On devices with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How long does the Trojan T1275-AGM battery last? Expected lifespan of the Trojan T1275-AGM is 5 to 8 years in mild-climate device use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured. ### What size is this battery? Dimensions (length × width × height) are 329×179×278 mm — also written as 329x179x278 mm — following the European DIN standard. Always measure the space in your device before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### Which interchangeable batteries are there for this one? Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop devices. See the "Equivalents" section to view recommended options at the same performance level. ## Reviews - **Average rating**: 4.82 / 5 (9 reviews) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-09-28*