# Trojan OverDrive AGM 31 · Solar battery 12V 102Ah

![Trojan OverDrive AGM 31 · Solar battery 12V 102Ah](https://bateriasonline.es/3417-home_default/trojan-overdrive-agm-31.jpg)

> Trojan OverDrive AGM 31: 102 Ah solar battery, 341×173×234 mm, AGM. Equivalent to Trojan 31-AGM.

**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-overdrive-agm-31
- **Language**: en
- **Brand**: Trojan
- **Reference**: BOL-TROJAN-OVERDRIVE AGM 31
- **MPN**: OverDrive AGM 31
- **Price**: 574,23 € (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 | 102 Ah |
| Length | 341 mm |
| Width | 173 mm |
| Height | 234 mm |
| Weight | 31 kg |

## Quick description

The Trojan OverDrive AGM 31 is a solar battery with 12 V and 102 Ah, measuring 341 × 173 × 234 mm.

## Description

## Who the Trojan OverDrive AGM 31 is for

The Trojan OverDrive AGM 31 is made for stand-alone photovoltaic and off-grid systems. Its capacity is rated at 20 hours (C20); at slower discharge rates the usable capacity is higher.
The OverDrive AGM 31 belongs to the Trojan TROJAN AGM RELIANT range. [More Trojan batteries](https://bateriasonline.es/en/trojan-batteries)

## Equivalents and alternatives to the Trojan OverDrive AGM 31

As the OverDrive AGM 31 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 31-AGM | AGM | 100 Ah | 341 × 173 × 233 |

## Trojan OverDrive AGM 31 vs 31-AGM and 31-AGM SV

How the OverDrive AGM 31 compares with Trojan batteries of similar size and capacity:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Trojan OverDrive AGM 31 (this one) | 102 Ah | 341 × 173 × 234 | 31 kg |
| Trojan 31-AGM | 100 Ah | 341 × 173 × 233 | 31 kg |
| Trojan 31-AGM SV | 100 Ah | 325 × 173 × 238 | 30 kg |

- Trojan 31-AGM: 2 Ah less, the same dimensions.
- Trojan 31-AGM SV: 2 Ah less, a different case (325 × 173 × 238 mm).

## AGM technology in the OverDrive AGM 31

Inside, the OverDrive AGM 31 has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## Before ordering the OverDrive AGM 31, check this

- The OverDrive AGM 31 needs 341 × 173 × 234 mm of space: measure it with the hold-down clamp in place.
- With 102 Ah, the OverDrive AGM 31 replaces an original battery of that capacity or slightly less.

## Frequently asked questions about the Trojan OverDrive AGM 31

### Trojan OverDrive AGM 31 or 31-AGM?

Compared with the OverDrive AGM 31, the Trojan 31-AGM has 2 Ah less. With 102 Ah, the OverDrive AGM 31 runs longer between charges than the 31-AGM (100 Ah). Both measure 341 × 173 × 234 mm, so they fit the same tray.

### How much does the Trojan OverDrive AGM 31 weigh?

The OverDrive AGM 31 weighs 31 kg. For reference, the Trojan 31-AGM (100 Ah) weighs 31 kg.

### Which battery is equivalent to the Trojan OverDrive AGM 31?

Only other AGM batteries with its dimensions and polarity: Trojan 31-AGM. Neither an EFB nor a conventional battery replaces the OverDrive AGM 31.

### How far can I discharge the Trojan OverDrive AGM 31 each day?

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

## Other options if you are unsure about the OverDrive AGM 31

- [All solar batteries for off-grid systems](https://bateriasonline.es/en/off-grid-solar-batteries)
- [More Trojan models](https://bateriasonline.es/en/trojan-batteries)
- [Long CWP100-12N](https://bateriasonline.es/en/long-cwp100-12n) · 100 Ah, 338×170×217 mm

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