# Fulbat FP12-50 · UPS battery 12V 50Ah

![Fulbat FP12-50 · UPS battery 12V 50Ah](https://bateriasonline.es/731-home_default/fulbat-fp12-50.jpg)

> Fulbat FP12-50: 50 Ah UPS battery, 197×165×170 mm, AGM. Equivalent to Long WPL50-12 and Long WPL50-12N. Ask for a no-obligation quote.

**Category:** [UPS batteries](https://bateriasonline.es/en/ups-batteries) → [Fulbat](https://bateriasonline.es/en/fulbat-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulbat-fp12-50
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FP12-50
- **MPN**: FP12-50
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT FP General Purpose |
| Application | UPS systems |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 50 Ah |
| Length | 197 mm |
| Width | 165 mm |
| Height | 170 mm |
| Weight | 14.2 kg |
| Terminal layout | 2 |
| Terminal type | T6 |

## Quick description

Fulbat FP12-50: UPS battery with 12 V and 50 Ah, measuring 197 × 165 × 170 mm.

## Description

## Who the Fulbat FP12-50 is for

The Fulbat FP12-50 is a VRLA AGM battery for UPS and uninterruptible power systems: it stays charged for years waiting for an outage and delivers the energy instantly when it comes. Check dimensions, terminal type (F1 or F2) and capacity so it fits the unit.
The FP12-50 belongs to the Fulbat FULBAT FP General Purpose range. [More Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat FP12-50

As the FP12-50 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) |
|---|---|---|---|
| Long WPL50-12 | AGM | 50 Ah | 199 × 166 × 171 |
| Long WPL50-12N | AGM | 50 Ah | 199 × 166 × 171 |

## Fulbat FP12-50 vs FP12-40 and FP12-40FR: differences

The real differences between the FP12-50 and the closest Fulbat models:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Fulbat FP12-50 (this one) | 50 Ah | 197 × 165 × 170 | 14.2 kg |
| Fulbat FP12-40 | 40 Ah | 197 × 165 × 170 | 12 kg |
| Fulbat FP12-40FR | 40 Ah | 197 × 165 × 170 | 12 kg |

- Fulbat FP12-40: 10 Ah less, the same dimensions.
- Fulbat FP12-40FR: 10 Ah less, the same dimensions.

## AGM technology in the FP12-50

The FP12-50 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.

## Before ordering the FP12-50, check this

- Length, width and height of the FP12-50: 197 × 165 × 170 mm.
- With 50 Ah, the FP12-50 replaces an original battery of that capacity or slightly less.

## Fulbat FP12-50 codes and part numbers

The FP12-50 is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | FP12-50 |
|---|---|
| Terminal type | T6 |
| Not to be confused with | Fulbat FP12-5.4 (5.4 Ah, positive terminal on the left), Fulbat FP12-5 (5.4 Ah), Fulbat FP12-5.5 (5.5 Ah) |

## Frequently asked questions about the Fulbat FP12-50

### Fulbat FP12-50 or FP12-40?

Compared with the FP12-50, the Fulbat FP12-40 has 10 Ah less. With 50 Ah, the FP12-50 runs longer between charges than the FP12-40 (40 Ah). Both measure 197 × 165 × 170 mm, so they fit the same tray.

### How much does the Fulbat FP12-50 weigh?

The FP12-50 weighs 14.2 kg. For reference, the Fulbat FP12-40 (40 Ah) weighs 12 kg.

### Which battery is equivalent to the Fulbat FP12-50?

Only other AGM batteries with its dimensions and polarity: Long WPL50-12 and Long WPL50-12N. Neither an EFB nor a conventional battery replaces the FP12-50.

### Which charger does the Fulbat FP12-50 need?

A charger with an AGM mode that limits voltage to about 14.4-14.7 V. Never an old unregulated charger: overcharging dries out an AGM beyond repair.

## Other options if you are unsure about the FP12-50

- [More uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [Full Fulbat catalogue](https://bateriasonline.es/en/fulbat-batteries)
- [Long WPL50-12](https://bateriasonline.es/en/long-wpl50-12) · 50 Ah, 199×166×171 mm
- [Long WPL50-12N](https://bateriasonline.es/en/long-wpl50-12n) · 50 Ah, 199×166×171 mm

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