---
product_id: 158022510
title: "HOMELYLIFE Voltage Converter DC 8V-40V to 13.8V 10A 138W Automatic Buck Boost Step Down Up Reducer Waterproof Module Transformer for Golf Cart Club Car"
brand: "homelylife"
price: "1404734₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Homelylife"
url: https://www.desertcart.vn/products/158022510-homelylife-voltage-converter-dc-8v-40v-to-13-8v-10a
store_origin: VN
region: Vietnam
---

# 8V-40V input range 100% waterproof & dustproof 13.8V 10A 138W output HOMELYLIFE Voltage Converter DC 8V-40V to 13.8V 10A 138W Automatic Buck Boost Step Down Up Reducer Waterproof Module Transformer for Golf Cart Club Car

**Brand:** homelylife
**Price:** 1404734₫
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your ride with precision and protection — never settle for less!

## Quick Answers

- **What is this?** HOMELYLIFE Voltage Converter DC 8V-40V to 13.8V 10A 138W Automatic Buck Boost Step Down Up Reducer Waterproof Module Transformer for Golf Cart Club Car by homelylife
- **How much does it cost?** 1404734₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/158022510-homelylife-voltage-converter-dc-8v-40v-to-13-8v-10a)

## Best For

- homelylife enthusiasts

## Why This Product

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

## Key Features

- • **Smart Safety Shield:** Integrated chip protects against over-current, overload, short-circuit, and overheating for worry-free use.
- • **Compact Yet Powerful:** Small footprint (1.26 x 2.95 x 1.26 in) packs 138W output, perfect for golf carts and mobile setups.
- • **Built for All Conditions:** Rugged aluminum shell with epoxy potting ensures waterproof, dustproof, and shock-resistant durability.
- • **Seamless Buck-Boost Power:** Automatically steps voltage up or down within 8V-40V input range for versatile device compatibility.
- • **Ultra-Efficient Conversion:** Synchronous Rectification tech delivers ≥95% efficiency, minimizing energy loss and heat.

## Overview

The HOMELYLIFE Voltage Converter is a compact, waterproof DC buck-boost module that converts 8V-40V input to a stable 13.8V output at 10A (138W). Featuring advanced synchronous rectification for over 95% efficiency and smart multi-protection circuitry, it’s engineered for reliable performance in extreme temperatures (-40°C to 80°C). Ideal for golf carts and mobile power needs, it combines rugged durability with intelligent safety in a sleek aluminum casing.

## Description

Product description T hese dc voltage reducer converters are high reliability power transformers. They feature wide input voltage, low power consumption, high efficiency, high reliability. We provide different power voltage converters for all kinds of application devices. Compact Size Compact aluminium shell with epoxy potting is anti-shock, damp-proof ,anti-dust protection and better heat dissipation Intelligent Protection Assembled with smart chip--has features of Over-current /Over-load /Low-load /Short-circuit /Over-heat intelligent protection Synchronous Rectification Technology The synchronous rectifier circuit use MOSFET instead of rectifier diode to greatly reduce the loss of the rectifier and improve the converter efficiency Features Non-Isolated Module Input Voltage: 12V/24V/36V nominal, accept: 8V - 40V input range Input Current: 10A (max) ; No-load input current: ≤10mA Output Voltage: DC 13.8V ±2% ; Output Current: 10A Ripple Wave: 50Mv Starting Delay time: ≤ 2S Efficiency: ≥95% Operating Temperature:-40 ~ 80℃ Weight: 248g / 8.75oz Package Include 1x DC Voltage Converter 8V-40V to 13.8V 10A 138W IP68 Waterproof Module Better Heat Dissipation Strict glue pouring process is waterproof, moisture-proof, seismic and adapt to a variety of harsh environment. Aluminium shell improve better heat dissipation effect and sturdiness to extend service life. SMT Process FR-4 multilayer lines, resistors, capacitors and switch MOS tube are SMD components with high integration, high reliability, high stability. Notes: It's normal that the case is hot when converter inside temp is over 113℉, converter will protect itself when inside temp is over 185℉. Wide Applications T hese compact size dc voltage reducer converters are high reliability power transformers. They can work safely and reliability within temperature range -40°C~80°C. Widely used to golf cart, motor, speaker, GPS, LED car display screen, air-conditioner, electric fan, solar energy, photo-voltaic power, DVD, industrial equipment ect.

Review: Highly Recommend. - I have bought several of these, (4) to be exact. (2) for 12Vdc & (2) for 13.8Vdc. I bought one of each for spares and the others have been in my Adventure Van for several years. They do a great job at regulating my 14.2Vdc lithium batteries to the 12 & 13.8V that are needed for sensitive electronics such as a fridge & fan which have microprocessors within them and cannot handle slightly higher voltages. My MaxAir fan has an issue where if the voltage is over 12.8 volts, the small circuit board will go bad, due to a design flaw in the MaxAir fan. Using this 12Vdc converter has proven over 2 years to keep my MaxAir fan in check. My fridge will not operate higher than 13.8 without causing the sensitive computer electronics on board from being damaged, so I regulate the voltage with the 13.8V unit. Do not exceed the rated amperage of these units or they will most likely fail. As a rule of thumb, always be under the rated amperage for long life. They do get warm (Not Hot) if they draw close to the rated amperage, so keep them in open air where they can get adequate cooling.
Review: Worked for my unregulated Johnson 25 - Time will tell how this holds up. I will update this review if my opinion changes. I was able to install this between my rectifier and charging system on my Johnson 25. Those are an unregulated rectified charging system, so RPM can raise voltage dangerously high. With very good lithium batteries coming out for trolling motors I was able to switch my starting batteries to a very small lawnmower battery and separate my house and motor battery system to save substantial weight. Problem was I saw extremely high voltages at wide-open throttle on my started battery. Placing this between my rectifier and starter wiring allowed me to safely charge my very small starter battery. Edit: 1 year later and many hours and this thing is still working great. Really helps manage the high voltage at high rpm, and has been consistent in putting out 13.8v.

## Features

- Input Voltage: 12V/24V/36V nominal, accept(8V-40V) range; Output Voltage: DC 13.8V 10A 138W.Within the voltage allowable range, it's a voltage reducer and also a booster too.
- Adopt Synchronous Rectification Technology to improve conversion efficiency, Maximum Efficiency:≥95%; Ripple Wave: 50Mv; Starting delay time:≤2S
- Assembled with smart chip, features Over-current /Over-load /Low-load /Short-circuit /Over-heat intelligent protection
- Compact aluminium shell with epoxy potting, 100% waterproof, anti-dust, anti-shock protection and better heat dissipation
- These voltage converters are excellent power transformers, can work safely and reliable in -40°C~80°C range. And all converters are offered 1 year replacement assurance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07WFMG11F |
| Best Sellers Rank | #18,630 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #82 in Power Converters |
| Brand | HOMELYLIFE |
| Brand Name | HOMELYLIFE |
| Current Rating | 10 Amps |
| Customer Reviews | 4.2 out of 5 stars 170 Reviews |
| Item Dimensions D x W x H | 1.26"D x 2.95"W x 1.26"H |
| Item Weight | 248 Grams |
| Manufacturer | EPBOWPT |
| Minimum Frequency | 50 Hz |
| Model | HL-DC840-138 |
| Number of Items | 1 |
| Part Number | 8V/40V-13.8V 10A |
| Power Source | DC |
| Product Dimensions | 1.26"D x 2.95"W x 1.26"H |
| Warranty Description | 6 months |

## Product Details

- **Brand:** HOMELYLIFE
- **Current Rating:** 10 Amps
- **Item Weight:** 248 Grams
- **Power Source:** DC
- **Product Dimensions:** 1.26"D x 2.95"W x 1.26"H

## Images

![HOMELYLIFE Voltage Converter DC 8V-40V to 13.8V 10A 138W Automatic Buck Boost Step Down Up Reducer Waterproof Module Transformer for Golf Cart Club Car - Image 1](https://m.media-amazon.com/images/I/81-tq2Mv1HL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Highly Recommend.
*by A***T on May 8, 2026*

I have bought several of these, (4) to be exact. (2) for 12Vdc & (2) for 13.8Vdc. I bought one of each for spares and the others have been in my Adventure Van for several years. They do a great job at regulating my 14.2Vdc lithium batteries to the 12 & 13.8V that are needed for sensitive electronics such as a fridge & fan which have microprocessors within them and cannot handle slightly higher voltages. My MaxAir fan has an issue where if the voltage is over 12.8 volts, the small circuit board will go bad, due to a design flaw in the MaxAir fan. Using this 12Vdc converter has proven over 2 years to keep my MaxAir fan in check. My fridge will not operate higher than 13.8 without causing the sensitive computer electronics on board from being damaged, so I regulate the voltage with the 13.8V unit. Do not exceed the rated amperage of these units or they will most likely fail. As a rule of thumb, always be under the rated amperage for long life. They do get warm (Not Hot) if they draw close to the rated amperage, so keep them in open air where they can get adequate cooling.

### ⭐⭐⭐⭐⭐ Worked for my unregulated Johnson 25
*by T***M on September 27, 2024*

Time will tell how this holds up. I will update this review if my opinion changes. I was able to install this between my rectifier and charging system on my Johnson 25. Those are an unregulated rectified charging system, so RPM can raise voltage dangerously high. With very good lithium batteries coming out for trolling motors I was able to switch my starting batteries to a very small lawnmower battery and separate my house and motor battery system to save substantial weight. Problem was I saw extremely high voltages at wide-open throttle on my started battery. Placing this between my rectifier and starter wiring allowed me to safely charge my very small starter battery. Edit: 1 year later and many hours and this thing is still working great. Really helps manage the high voltage at high rpm, and has been consistent in putting out 13.8v.

### ⭐⭐⭐⭐⭐ Just what I needed.
*by M***P on July 23, 2022*

Perfect application. As I made my own custom led off road lights for my truck. I needed a voltage regulator but, this is a step up/down kinda deal that has high current of 10 amps. So I bought 4 units. 360 degrees of lights. Better than researching and experimenting, fabricating schematics and making circuit boards. Note: as engine idles and makes less voltage, it draws more current. As engine is up in RPM's it uses less. As long as I'm under 50 amps total, I'm good. And my lights don't dim or get super bright and burn up. Hence, my project is a total success. Only difficulty is finding a place for mounting. I used a relay switch box controller. They go between the lights and the outputs of the controller. The two Black wire are different. The input can be grounded, Output-NOT! The output wires both + &- go strait to the lights. The Red wire to the relay controller box. No problems, Nothing hot. No worries. My lights were made to run at 13.4 to 14 volts. Excellent! How long they last under the hood of a black truck is another question that I cannot answer.

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-06-03*