# Trojan T1275-AGM · Solar battery 12V 140Ah

![Trojan T1275-AGM · Solar battery 12V 140Ah](https://bateriasonline.es/3146-home_default/trojan-t1275-agm.jpg)

> Trojan T1275-AGM: 140 Ah solar battery, 329×179×278 mm, AGM. Equivalent to Trojan SAGM 12 135 and Trojan SAES 12 135.

**Category:** [Solar batteries for off-grid systems](https://bateriasonline.es/en/off-grid-solar-batteries) → [Trojan](https://bateriasonline.es/en/trojan-batteries)

- **Canonical URL**: https://bateriasonline.es/en/trojan-t1275-agm
- **Language**: en
- **Brand**: Trojan
- **Reference**: BOL-TROJAN-T1275-AGM
- **MPN**: T1275-AGM
- **Price**: 667,97 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Trojan |
| Range | TROJAN AGM RELIANT |
| Application | Solar and off-grid systems |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 140 Ah |
| Length | 329 mm |
| Width | 179 mm |
| Height | 278 mm |
| Weight | 37 kg |
| Terminal type | 5, 8, 15 |

## Quick description

The Trojan T1275-AGM is a solar battery with 12 V and 140 Ah, measuring 329 × 179 × 278 mm.

## Description

## Where the Trojan T1275-AGM fits

The Trojan T1275-AGM is a deep-cycle battery for off-grid solar systems: it stores the day's energy for use at night and withstands years of charge and discharge cycles. Its capacity is rated at 20 hours (C20); at slower discharge rates the usable capacity is higher.
The T1275-AGM belongs to the Trojan TROJAN AGM RELIANT range. [See all Trojan batteries](https://bateriasonline.es/en/trojan-batteries)

## Equivalents and alternatives to the Trojan T1275-AGM

As the T1275-AGM is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Trojan SAGM 12 135 | AGM | 135 Ah | 329 × 179 × 278 |
| Trojan SAES 12 135 | AGM | 134 Ah | 329 × 179 × 278 |

## Trojan T1275-AGM vs SAGM 12 135 and SAES 12 135: which one to choose?

Torn between the T1275-AGM and another similar Trojan? This is what changes:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Trojan T1275-AGM (this one) | 140 Ah | 329 × 179 × 278 | 37 kg |
| Trojan SAGM 12 135 | 135 Ah | 329 × 179 × 278 | 38 kg |
| Trojan SAES 12 135 | 134 Ah | 329 × 179 × 278 | 39 kg |

- Trojan SAGM 12 135: 5 Ah less, the same dimensions.
- Trojan SAES 12 135: 6 Ah less, the same dimensions.

## What it means that the T1275-AGM is AGM

The T1275-AGM is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. It withstands many more cycles than a conventional lead battery, at the cost of being more sensitive to overcharging.

## Check this before ordering the Trojan T1275-AGM

- Length, width and height of the T1275-AGM: 329 × 179 × 278 mm.
- With 140 Ah, the T1275-AGM replaces an original battery of that capacity or slightly less.

## Trojan T1275-AGM codes and part numbers

The T1275-AGM is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | T1275-AGM |
|---|---|
| Terminal type | 5, 8, 15 |

## Frequently asked questions about the Trojan T1275-AGM

### Trojan T1275-AGM or SAGM 12 135?

Compared with the T1275-AGM, the Trojan SAGM 12 135 has 5 Ah less. With 140 Ah, the T1275-AGM runs longer between charges than the SAGM 12 135 (135 Ah). Both measure 329 × 179 × 278 mm, so they fit the same tray.

### How much does the Trojan T1275-AGM weigh?

The T1275-AGM weighs 37 kg. For reference, the Trojan SAGM 12 135 (135 Ah) weighs 38 kg.

### Which battery is equivalent to the Trojan T1275-AGM?

Only other AGM batteries with its dimensions and polarity: Trojan SAGM 12 135 and Trojan SAES 12 135. Neither an EFB nor a conventional battery replaces the T1275-AGM.

### How far can I discharge the Trojan T1275-AGM each day?

To make it last years, do not go below 50% routinely. Size the bank so daily consumption is half the installed capacity.

## Keep comparing: alternatives to the T1275-AGM

- [All solar batteries for off-grid systems](https://bateriasonline.es/en/off-grid-solar-batteries)
- [The whole Trojan range](https://bateriasonline.es/en/trojan-batteries)
- [Trojan SAGM 12 135](https://bateriasonline.es/en/trojan-sagm-12-135) · 135 Ah, 329×179×278 mm
- [Trojan SAES 12 135](https://bateriasonline.es/en/trojan-saes-12-135) · 134 Ah, 329×179×278 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*