# Solar battery Trojan U1-AGM 12V 33Ah AGM ![Solar battery Trojan U1-AGM 12V 33Ah AGM](https://baterias.com/610-home_default/battery-trojan-u1-agm-12v.jpg) > Trojan U1-AGM solar battery 12V 33Ah AGM. Dimensions 198Γ—132Γ—171 mm. Designed for PV systems with daily cyclic loads. **Category:** [Batteries for Solar Applications](https://baterias.com/gb/batteries-for-solar-applications) β†’ [TROJAN](https://baterias.com/gb/trojan) - **Canonical URL**: https://baterias.com/gb/battery-trojan-u1-agm-12v - **Language**: en-GB - **Brand**: TROJAN - **Reference**: BCOM-TROJAN-U1-AGM - **EAN**: 8404653001490 - **MPN**: U1-AGM - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | TROJAN | | Reference | U1-AGM | | Model | TROJAN AGM | | Voltage (V) | 12 V | | Largo | 198 mm | | Ancho | 132 mm | | Alto | 171 mm | | Peso | 12 kg | | TecnologΓ­a | AGM | | Terminal type | 15 | | Capacity (C20) | 33 Ah (c20) | | Capacity (C5) | 29 Ah (c5) | ## Quick description **Trojan U1-AGM 12V 33Ah** 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 πŸ”Œ Voltage 12 V ⚑ Capacity 33 Ah C20 πŸ“ Dimensions 198Γ—132Γ—171 mm βš™οΈ Technology AGM βš–οΈ Weight 12 kg 🏷️ Model TROJAN AGM ## Description ## Solar battery Trojan U1-AGM 33Ah 12V 12*V* Voltage 33*Ah* Capacity 12*kg* Weight The **Trojan U1-AGM** with AGM technology stores **33 Ah** at **12 V** for off-grid photovoltaic installations and storage systems. Measuring 198 Γ— 132 Γ— 171 mm, it is the direct replacement for off-grid PV systems fitted from the factory with a 33 Ah battery of this format. - Maintenance-free in off-grid installations. - Compatible with common MPPT and PWM controllers. - AGM: faster recharging and better cycle resistance than a conventional battery. - Low self-discharge during the darker months. ### What the Trojan U1-AGM is for The Trojan U1-AGM is designed for off-grid photovoltaic installations and storage systems. Size the capacity so as not to discharge more than 50% daily and you will greatly extend its life. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 12 kg and 15 terminals. ### Technology inside the Trojan U1-AGM Trojan builds the U1-AGM to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position. 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. ### Dimensions, polarity and mounting In terms of format, the Trojan U1-AGM measures 198 Γ— 132 Γ— 171 mm (length Γ— width Γ— height) and weighs 12 kg. It uses 15 terminals, the system that anchors and connects it in the vehicle. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery. ### Why choose Trojan batteries 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. We guarantee that every Trojan arrives new, charged and with the manufacturer's full warranty. ### How to make it last longer Size the installation so as not to discharge the battery more than 50% daily and set the controller to the battery technology. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### Official warranty The Trojan U1-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. ### When you get it and how to return it Same-day dispatch from our warehouse for in-stock orders placed **before 6:00 pm**: 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 **14 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 U1-AGM an AGM battery and what are the benefits of AGM? Yes. The U1-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 U1-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 our blog. 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 (βˆ’) 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 β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). On devices with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How many years does this battery last? Expected lifespan of the Trojan U1-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 are the measurements of the U1-AGM model? Dimensions (length Γ— width Γ— height) are 198Γ—132Γ—171 mm β€” also written as 198x132x171 mm β€” 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. ### What are the equivalents of the U1-AGM model? 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 β€” 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. ## Compatible vehicles This battery fits 4 vehicles. Most searched: - [Tennant S3B](https://baterias.com/gb/floor-sweeper-batteries/tennant/s3b) - [NSS Enterprises Wrangler 1503 AB](https://baterias.com/gb/floor-scrubber-batteries/nss-enterprises/wrangler-1503-ab) - [Karcher BD 40/12 C Bp](https://baterias.com/gb/floor-scrubber-batteries/karcher/bd-4012-c-bp) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team β€” automotive battery specialists since 2012. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-28*