# NOCO GEN5X3: on-board charger 3 banks 15A (12V)

![NOCO GEN5X3: on-board charger 3 banks 15A (12V)](https://bateriasonline.es/4363-home_default/noco-gen5x3-marine-charger-three-banks.jpg)

> NOCO GEN5X3: three isolated 5 A banks in an IP68 case for boats with three 12V batteries of up to 120 Ah. When the GENPRO10X3 is the better choice instead.

**Category:** [Battery chargers](https://bateriasonline.es/en/battery-chargers) → NOCO

- **Canonical URL**: https://bateriasonline.es/en/noco-gen5x3-marine-charger-three-banks
- **Language**: en
- **Brand**: NOCO
- **Reference**: BOL-NOCO-GEN5X3
- **MPN**: GEN5X3
- **Last updated**: 2026-11-10

## Quick description

For boats carrying three 12V batteries: three isolated 5 A outputs, up to 120 Ah each, in a sealed IP68 charger.
- 3 banks of 5 A, 15 A total
- Up to 120 Ah per bank
- Sealed IP68
- Lithium and 12V lead-acid
- 2.61 kg

## Description

## NOCO GEN5X3: on-board charger 3 banks 15A (12V)

If your boat carries three 12V batteries (starting, house and, for example, a trolling motor), the NOCO GEN5X3 looks after all of them at once through three isolated 5 A banks. Each battery can be up to 120 Ah.
With two batteries, the GEN5X2 is enough. If any battery exceeds 120 Ah, or the boat is used daily and you need faster recharges, the GENPRO10X3 delivers 10 A per bank and accepts up to 230 Ah.
The unit measures 180 x 145 x 56 mm and mounts in any orientation with anti-vibration backing.

### Features

- •   Three 5 A outputs isolated from each other.
- •   Each bank takes up to 120 Ah.
- •   220 W maximum output.
- •   12V, AGM, Lithium, Repair and Force modes.
- •   Fully sealed IP68 housing.
- •   Detection from 1 V and Force Mode.
- •   Remembers the last mode used.

### Technical data

| Mains input voltage | 100-240 VAC, 50-60 Hz |
|---|---|
| Output power | 220 W max. |
| Charging banks | 3 |
| Current per bank | 5 A (12 V) |
| Total charging current | 15 A |
| Battery voltage | 12 V |
| Battery chemistries | Lead-acid (wet, gel, MF, calcium, EFB, AGM) and 12V lithium with BMS (incl. LiFePO4) |
| Battery capacity | Up to 120 Ah per bank; maintains all battery sizes |
| Charging modes | 12V, 12V AGM, 12V Lithium, Repair and Force |
| Low-voltage detection | 1 V (Force Mode: 0 V) |
| Back current drain | < 0.5 mA |
| Operating temperature | -20 °C to +40 °C |
| Housing protection | IP68 |
| Cooling | Natural convection |
| DC cable length | approx. 1.83 m |
| Approx. charging time (50% depth of discharge) | 20 Ah: 3 h · 40 Ah: 6 h · 100 Ah: 15 h · 120 Ah: 18 h |
| Dimensions (L x W x H) | 180 x 145 x 56 mm |
| Weight | 2.61 kg |

### In the box

- •   GEN5X3 on-board charger
- •   2 x #8 27 mm self-tapping screws
- •   User guide and warranty

### Common questions

Can I connect just two batteries?
The banks are independent, but if you will only ever use two, the GEN5X2 is more compact.
Which battery voltage does it accept?
12V only, lead-acid or lithium with BMS.
How long for a 100 Ah battery?
About 15 h from half charge, on each bank.

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