# NOCO GB251+: commercial jump starter 3000A (24V)

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> NOCO GB251+: 24V jump starter with 3000A peak for petrol and diesel engines up to 32 L, trucks, buses and machinery. 137 Wh battery and voltmeter.

**Category:** [Jump starters and battery boosters](https://bateriasonline.es/en/jump-starters-battery-boosters) → [NOCO](https://bateriasonline.es/en/noco-jump-starters)

- **Canonical URL**: https://bateriasonline.es/en/noco-gb251-24v-jump-starter-3000a
- **Language**: en
- **Brand**: NOCO
- **Reference**: BOL-NOCO-GB251
- **EAN**: 1210000619419
- **MPN**: GB251
- **Last updated**: 2026-11-04

## Quick description

The 24V member of the MAX series: 3000A peak for petrol and diesel engines up to 32 L, in a 6.17 kg unit.
- 3000A peak, 24V systems
- Petrol and diesel up to 32 L
- 137 Wh lithium battery
- Detects batteries from 3V

## Description

## NOCO GB251+: commercial jump starter 3000A (24V)

Go for the NOCO Boost MAX GB251+ if your vehicles run on 24V: trucks up to class 8, buses, motorhomes and agricultural, construction or mining machinery with petrol or diesel engines up to 32 L and 6 to 16 cylinders.
It only starts 24V systems. For 12V heavy equipment the GB250+ (5250A, up to 16 L) is the right pick, and if you need both voltages in one unit the GB500+ offers a 12V/24V selector, 6250A and up to 45 L.
Its 137 Wh battery powers two USB ports and an auxiliary output, which is 12V even though the unit starts 24V systems. UltraSafe 2.0, voltmeter, 60-second timer and a 600-lumen torch complete it.

### Features

- •   3000A peak current for 24V lead-acid systems.
- •   Petrol and diesel engines up to 32 L, 6 to 16 cylinders.
- •   For class 8 trucks, buses, motorhomes and machinery.
- •   UltraSafe 2.0 with spark-proof connections, polarity protection and better thermal management.
- •   Voltmeter reading the vehicle battery; 60-second timer to conserve charge.
- •   Detects batteries down to 3V, with manual override mode.
- •   137 Wh battery, two 5V, 2.1A USB ports and an auxiliary 12V, 15A output.
- •   8.5 h recharge via the XGC4 adapter (56W) or a 12V vehicle socket.
- •   600-lumen torch with 7 modes, IP65 with ports closed, 6.17 kg, EVA case.

### Technical data

| System voltage | 24V |
|---|---|
| Peak current | 3000 A |
| Internal battery | Lithium-ion, 137 Wh |
| Petrol and diesel engines | Up to 32 L |
| Compatible batteries | Lead-acid: wet, gel, MF, EFB, AGM |
| Minimum detection voltage | 3V (manual override below this) |
| USB (output) | 2 × 5V, 2.1A |
| 12V input | 12V, 5A (14V max.) |
| 12V output | 12V, 15A |
| Recharge time | 8.5 h with the XGC4 adapter (56W) or the vehicle's 12V socket |
| LED torch | 600 lumens, 7 modes (incl. SOS and strobe) |
| Built-in voltmeter | Yes |
| Jump start timer | 60 s (power saving) |
| Housing protection | IP65 (with ports closed) |
| Operating temperature | -20 °C to +50 °C |
| Charging temperature | 0 °C to +40 °C |
| Cooling | Natural convection |
| Weight | 6.17 kg |
| Dimensions | 382 x 219 x 93 mm |

### In the box

- •   NOCO Boost MAX GB251+ jump starter
- •   EVA case
- •   XGC4 mains adapter
- •   12V vehicle charging cable
- •   User guide

### Common questions

Will it start a 12V vehicle?
It is specified for 24V systems. For 12V use the GB250+, or the GB500+ which switches between 12V and 24V.
Why is the auxiliary output 12V?
That is how it is specified: the GB251+ starts 24V systems but its auxiliary output is 12V, 15A.
Minimum battery voltage it detects?
3V; below that you can use the manual override mode.

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