# Trojan 27-GEL · Solar battery 12V 91Ah

![Trojan 27-GEL · Solar battery 12V 91Ah](https://bateriasonline.es/3298-home_default/trojan-27-gel.jpg)

> Trojan 27-GEL: 91 Ah solar battery, 324×171×234 mm, GEL. VAT included and shipping cost shown before you pay.

**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-27-gel
- **Language**: en
- **Brand**: Trojan
- **Reference**: BOL-TROJAN-27-GEL
- **EAN**: 8404653001322
- **MPN**: 27-GEL
- **Price**: 736,47 € (VAT incl., Spain)
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Trojan |
| Range | TROJAN GEL |
| Application | Solar and off-grid systems |
| Technology | GEL |
| Voltage | 12 V |
| Capacity | 91 Ah |
| Length | 324 mm |
| Width | 171 mm |
| Height | 234 mm |
| Weight | 29 kg |

## Quick description

Trojan 27-GEL: solar battery with 12 V and 91 Ah, measuring 324 × 171 × 234 mm.

## Description

## Where the Trojan 27-GEL fits

The Trojan 27-GEL 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 27-GEL belongs to the Trojan TROJAN GEL range. [The full range of Trojan batteries](https://bateriasonline.es/en/trojan-batteries)

## Inside the 27-GEL: GEL technology

The 27-GEL is a gel battery: the electrolyte is immobilised in silica gel. It requires a charger with a specific gel profile.

## Trojan 27-GEL vs 31-GEL and 24-GEL

What sets the 27-GEL apart from its neighbours in the Trojan range:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Trojan 27-GEL (this one) | 91 Ah | 324 × 171 × 234 | 29 kg |
| Trojan 31-GEL | 102 Ah | 329 × 171 × 245 | 32 kg |
| Trojan 24-GEL | 77 Ah | 276 × 171 × 236 | 24 kg |

- Trojan 31-GEL: 11 Ah more, a different case (329 × 171 × 245 mm).
- Trojan 24-GEL: 14 Ah less, a different case (276 × 171 × 236 mm).

## Equivalents and alternatives to the Trojan 27-GEL

No other reference in the catalogue fully matches the dimensions and polarity of the 27-GEL; you will find the closest ones among our [solar batteries for off-grid systems](https://bateriasonline.es/en/off-grid-solar-batteries).

## Trojan 27-GEL codes and part numbers

The 27-GEL is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | 27-GEL |
|---|---|
| EAN | 8404653001322 |
| Not to be confused with | Trojan 24-GEL (77 Ah) |

## What to look at before buying the 27-GEL

- Capacity of the 27-GEL: 91 Ah; the same as your current battery or slightly more is fine.
- Measure the space: the 27-GEL takes up 324 × 171 × 234 mm.

## Frequently asked questions about the Trojan 27-GEL

### Trojan 27-GEL or 31-GEL?

Compared with the 27-GEL, the Trojan 31-GEL has 11 Ah more. With 102 Ah, the 31-GEL runs longer between charges than the 27-GEL (91 Ah). Mind the space: the 31-GEL measures 329 × 171 × 245 mm.

### How much does the Trojan 27-GEL weigh?

The 27-GEL weighs 29 kg. For reference, the Trojan 31-GEL (102 Ah) weighs 32 kg.

### Which charger does the Trojan 27-GEL need?

A charger with a GEL mode not exceeding 14.1-14.4 V. Charging it with a conventional lead-acid profile damages it through overcharging.

## More batteries to compare with the 27-GEL

- [All solar batteries for off-grid systems](https://bateriasonline.es/en/off-grid-solar-batteries)
- [Full Trojan catalogue](https://bateriasonline.es/en/trojan-batteries)
- [Trojan 5SHP-GEL](https://bateriasonline.es/en/trojan-5shp-gel) · 125 Ah, 345×171×283 mm

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