# Optima YTS-5.5 · Motorhome battery 12V 75Ah 975A

![Optima YTS-5.5 · Motorhome battery 12V 75Ah 975A](https://bateriasonline.es/3895-home_default/optima-yts-5-5.jpg)

> Optima YTS-5.5 (ETN 851187000): 75 Ah motorhome battery, 975 A (EN), 325×165×238 mm, spiral AGM.

**Category:** [Leisure batteries for motorhomes and caravans](https://bateriasonline.es/en/leisure-batteries-motorhome-caravan) → [Optima](https://bateriasonline.es/en/optima-batteries)

- **Canonical URL**: https://bateriasonline.es/en/optima-yts-5-5
- **Language**: en
- **Brand**: Optima
- **Reference**: BOL-OPTIMA-YTS-5.5
- **EAN**: 4016987113585
- **MPN**: YTS-5.5
- **Price**: 255,55 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Optima |
| Range | OPTIMA YELLOW TOP |
| Application | Motorhomes and caravans |
| Technology | Spiral AGM |
| Voltage | 12 V |
| Capacity | 75 Ah |
| Cold cranking amps (EN) | 975 A |
| Length | 325 mm |
| Width | 165 mm |
| Height | 238 mm |
| Weight | 27.9 kg |
| Terminal layout | 8 |
| ETN code | 851187000 |

## Quick description

Optima YTS-5.5 (ETN 851 187 000, also written 851187000): motorhome battery with 12 V, 75 Ah and 975 A cold cranking current, measuring 325 × 165 × 238 mm.

## Description

## The Optima YTS-5.5 at a glance

The Optima YTS-5.5 is made for the living area of a motorhome. Unlike the starter battery, it takes slow, deep discharges night after night.
The YTS-5.5 belongs to the Optima OPTIMA YELLOW TOP range. [The full range of Optima batteries](https://bateriasonline.es/en/optima-batteries)

## Equivalents and alternatives to the Optima YTS-5.5

We have no other battery with exactly the dimensions and polarity of the YTS-5.5. Browse the rest of our [leisure batteries for motorhomes and caravans](https://bateriasonline.es/en/leisure-batteries-motorhome-caravan) to compare close options.

## Optima YTS-5.5 vs YTR-5.0 and YTS-4.2

What sets the YTS-5.5 apart from its neighbours in the Optima range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Optima YTS-5.5 (this one) | 75 Ah | 975 A | 325 × 165 × 238 | 27.9 kg |
| Optima YTR-5.0 | 66 Ah | 845 A | 309 × 172 × 219 | 20.6 kg |
| Optima YTS-4.2 | 55 Ah | 765 A | 254 × 175 × 200 | 20.3 kg |

- Optima YTR-5.0: 9 Ah less, 130 A less cranking power, a different case (309 × 172 × 219 mm).
- Optima YTS-4.2: 20 Ah less, 210 A less cranking power, a different case (254 × 175 × 200 mm).

## Spiral AGM technology in the YTS-5.5

Inside, the YTS-5.5 rolls its plates into cylindrical cells (spiral AGM). It is the basis of OPTIMA batteries.

## Check this before ordering the Optima YTS-5.5

- Length, width and height of the YTS-5.5: 325 × 165 × 238 mm.
- Your current battery should say about 75 Ah; a little more is also fine.
- Check the EN amps on your battery: if it says 975 A or less, the YTS-5.5 covers your engine.

## Part numbers and codes for the Optima YTS-5.5

Shops, garages and catalogues identify the YTS-5.5 with these codes:

| Commercial reference | YTS-5.5 |
|---|---|
| ETN code | 851187000 (also 851 187 000) |
| EAN | 4016987113585 |
| Case size according to Optima | 31A (BCI) |
| Base hold-down | B00 |
| Also known as | Optima 851187000 · Optima 851 187 000 |

## Frequently asked questions about the Optima YTS-5.5

### YTS-5.5 or YTR-5.0: which one suits me?

Compared with the YTS-5.5, the Optima YTR-5.0 has 9 Ah less and 130 A less cranking power. The YTS-5.5 cranks harder; the YTR-5.0 is only a good option if your original battery says 845 A or less. Mind the space: the YTR-5.0 measures 309 × 172 × 219 mm.

### What is the ETN code of the Optima YTS-5.5?

851187000, also written 851 187 000. The ETN (European Type Number) is printed on the label and used in parts catalogues.

### How much does the Optima YTS-5.5 weigh?

27.9 kg, with 75 Ah of capacity. For reference, the Optima YTR-5.0 (66 Ah) weighs 20.6 kg.

### Which charger does the Optima YTS-5.5 need?

A charger with an AGM mode. If the battery has dropped below 10.5 V some chargers will not recognise it: use one with a recovery mode or one specific to spiral AGM.

## Keep comparing: alternatives to the YTS-5.5

- [Other leisure batteries for motorhomes and caravans](https://bateriasonline.es/en/leisure-batteries-motorhome-caravan)
- [The whole Optima range](https://bateriasonline.es/en/optima-batteries)

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