---
product_id: 88193212
title: "Guest 2740A Guest On-Board Battery Charger 40A / 12V; 4 Bank; 120V Input"
brand: "guest"
price: "A$1118"
currency: AUD
in_stock: true
reviews_count: 13
category: "Guest"
url: https://www.desertcart.com.au/products/88193212-guest-2740a-guest-on-board-battery-charger-40a-12v-4
store_origin: AU
region: Australia
---

# 40A high-output charging IP67 waterproof & shockproof 4 independent charging banks Guest 2740A Guest On-Board Battery Charger 40A / 12V; 4 Bank; 120V Input

**Brand:** guest
**Price:** A$1118
**Availability:** ✅ In Stock

## Summary

> 🔌 Charge like a pro, stay powered like a boss.

## Quick Answers

- **What is this?** Guest 2740A Guest On-Board Battery Charger 40A / 12V; 4 Bank; 120V Input by guest
- **How much does it cost?** A$1118 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/88193212-guest-2740a-guest-on-board-battery-charger-40a-12v-4)

## Best For

- guest enthusiasts

## Why This Product

- Trusted guest brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Simplicity:** Pre-wired with ring terminals and included mounting hardware for a hassle-free install under 20 minutes.
- • **Quad-Bank Smart Charging:** Independently monitors and optimizes each battery for peak performance and longevity.
- • **Safety-First Engineering:** Comprehensive protections including reverse polarity, over-current, over-voltage, and ignition safeguards keep your system secure.
- • **Power-Packed 40 Amp Output:** Rapidly charges multiple 12V batteries with industry-leading efficiency.
- • **Built to Brave the Elements:** 100% waterproof and shock-resistant design ensures reliable operation in any marine or rugged environment.

## Overview

The Guest 2740A is a robust 12V, 40 amp on-board battery charger featuring 4 independent charging banks with smart sensing and control. Designed for both flooded and AGM lead acid batteries, it boasts full waterproof (IP67) and shock resistance, making it ideal for marine and harsh environments. Safety is paramount with built-in protections against reverse polarity, over-current, over-voltage, over-temperature, and ignition. Lightweight and compact, it installs quickly with included hardware and offers a 2-year warranty for peace of mind.

## Description

12V 40 amp 4 bank on-board battery charger. Built-in safety: reverse polarity, over-current, over-voltage, over-temperature and ignition protection. In-line fuses for maximum DC wire protection. 100% Waterproof (IP67) and shock resistant for all fresh and saltwater applications. Dedicated battery charging, sensing and control per bank. For all 12 volt flooded and AGM lead acid batteries. 2 year warranty.

Review: Easy install - Works well for my batteries on board.
Review: Compact And Easy to Install - The Guest 2710A comes pre-wired with ring terminals and a 15amp AC power cord with plug. The unit includes four stainless mounting screws. Installation was super easy and took less than 20 minutes. After powering it up, the unit automatically sensed the type and condition of the battery. Without question it doesn't get any easier than that. I also appreciate the water proof rating as it's installed in a rear compartment that is prone to being damp. It's light weight and takes up very little space.

## Features

- Item Package Dimension: 13.49999998623L x 10.749999989035W x 9.49999999031H inches
- Item Package Weight - 11.64922592408 Pounds
- Item Package Quantity - 1
- Product Type - BATTERY CHARGER

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07D1FS8FM |
| Amperage | 40 Amps |
| Batteries | 1 Unknown batteries required. |
| Best Sellers Rank | #47,890 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #106 in Power Tool Battery Chargers |
| Brand | Guest |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,048) |
| Date First Available | May 11, 2018 |
| Item Weight | 8.5 pounds |
| Item model number | 2740A |
| Manufacturer | Guest |
| Manufacturer Part Number | 2740A |
| Model | 2740A |
| Product Dimensions | 18 x 10 x 6 inches |
| Voltage | 12 Volts |

## Product Details

- **Brand:** Guest
- **Color:** Unspecified
- **Item Weight:** 8.5 Pounds
- **Output Voltage:** 12 Volts
- **Product Dimensions:** 9"D x 10"W x 15"H

## Images

![Guest 2740A Guest On-Board Battery Charger 40A / 12V; 4 Bank; 120V Input - Image 1](https://m.media-amazon.com/images/I/61qg6xsoegS.jpg)
![Guest 2740A Guest On-Board Battery Charger 40A / 12V; 4 Bank; 120V Input - Image 2](https://m.media-amazon.com/images/I/711zXY8ReJL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy install
*by S***E on December 15, 2025*

Works well for my batteries on board.

### ⭐⭐⭐⭐⭐ Compact And Easy to Install
*by B***D on November 8, 2025*

The Guest 2710A comes pre-wired with ring terminals and a 15amp AC power cord with plug. The unit includes four stainless mounting screws. Installation was super easy and took less than 20 minutes. After powering it up, the unit automatically sensed the type and condition of the battery. Without question it doesn't get any easier than that. I also appreciate the water proof rating as it's installed in a rear compartment that is prone to being damp. It's light weight and takes up very little space.

### ⭐⭐⭐⭐⭐ The best one I have ever found!
*by C***K on December 5, 2025*

This is the best on board battery charger I have ever found. It is quiet and runs cool and has a very long cord. I also like the way it was packaged because there was no chance of any damage upon delivery.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.au/products/88193212-guest-2740a-guest-on-board-battery-charger-40a-12v-4](https://www.desertcart.com.au/products/88193212-guest-2740a-guest-on-board-battery-charger-40a-12v-4)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-09*