ECOFLOW Alternator Charger 800W User Manual

: July 31, 2024
: ECOFLOW

Table of Contents

Alternator Charger 800W
Specifications
Product Usage Instructions
Overview
Wire Up Your Charger
Compatibility
- FAQ
Are there any requirements for car models?

Alternator Charger 800W

Specifications

Power: 800W
Communication: Bluetooth or Wi-Fi
Ports: Vehicle Battery, Portable Power Station, COM
Communication
LED Indicator Colors: Green, Blue, White, Red, Yellow

Product Usage Instructions

Overview

The Alternator Charger is a device that communicates with the
EcoFlow app via Bluetooth or Wi-Fi. It has ports for connecting to
the vehicle starter battery, portable power station, and COM
communication.

Wire Up Your Charger

Wiring Steps:

Connect the ring terminal of the Fuse Cable to the positive
terminal of the vehicle starter battery or RV house battery.
Connect the positive terminal of the Input Cable and the other
end of the Fuse Cable to a torque of 3 to 4 N*m.
Ground the negative terminal of the Input Cable to the chassis
of the vehicle or directly to the RV house battery’s negative
terminal.
Connect the Input Cable to the Vehicle Battery Port on the
charger.
Connect the Output Cable from the Portable Power Station Port
of the charger to the extra battery port of the power station or
extra battery.

Note: Ensure all connections are firm to prevent cable
melting.

Compatibility

The charger is compatible with vehicle starter batteries or RV
house batteries with nominal voltages of V or V. Adjust start
voltage using the EcoFlow app for older or special car models with
lower overall voltages.

FAQ

Are there any requirements for car models?

For some older or special car models with lower voltages, adjust
the start voltage using the EcoFlow app to ensure compatibility
with the charger.

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Alternator Charger (800W) – User Manual

Contents
Overview LED Indication
Wire Up Your Charger Wiring Steps Compatibility Environmental Requirements
Install Your Charger (Optional) Getting Started
Power On/Off Bind Your Charger How to Switch Mode and State Charge Mode Battery Maintenance Mode Reverse Charge Mode How to Unplug Cables Troubleshooting Maintenance Cable Replacement What’s in the Box Specifications Safety Instructions

Overview

Antenna

Communicates with EcoFlow app via Bluetooth or Wi-Fi.

Vehicle Battery Port

Connected to the vehicle starter battery or RV house battery via the Input Cable.

Portable Power Station Port

Connected to the portable power station or extra battery via the XT150 Output Cable.

COM Communication Port (RJ )

Preset port. Stay tuned.

Power Button

Short press once to power on. Long press for 3s to power off.

LED Indicator

Indicates the operating mode and state. Refer to the table below for details.

LED Indication

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Color Green
Blue
White
Red Yellow

Alternator Charger (800W) – User Manual

State

Indication

Solid

In Charge Mode.

Breathing

Charge Mode in standby.

Solid

In Battery Maintenance Mode.

Breathing

Battery Maintenance Mode in standby.

Solid

In Reverse Charge Mode.

Breathing

Reverse Charge Mode in standby.

Solid

Error alarm. Check app interfaces for details.

Solid

Unbinding from EcoFlow account.

Breathing

Binding to EcoFlow account.

Wire Up Your Charger
It’s recommended that the wiring is performed by a professional. Wear personal protective equipment (including protective goggles and gloves) during wiring and installation. When wiring, avoid high temperature, sharp, and friction- prone areas, and securely fasten the cables to avoid cable wear or loose connections caused by cable movement. Always observe the safety instructions of the battery during wiring. It’s recommended to complete wiring before starting the vehicle and turning on the charger. Power off the charger and disconnect it before changing the wiring each time.

Wiring Steps

A Alternator Charger

B Input Cable

C XT150 Output Cable

D Fuse Cable

E Vehicle Starter Battery or RV House Battery F Portable Power Station or Extra Battery

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Alternator Charger (800W) – User Manual

1. Connect the ring terminal of the Fuse Cable to the positive (+) terminal on the vehicle starter battery or RV house battery.
2. Connect the other end of the Fuse Cable and the positive (red) terminal of the Input Cable to a torque of 3 to 4 Nm. Insufficient torque will lead to a loose connection and cable melting. A torque higher than 6 Nm will break the fuse.
3. Ground the negative (black) terminal of the Input Cable to the chassis of the vehicle or directly to the RV house battery’s negative (-) terminal if you are connecting it to an RV.
4. Connect the Input Cable to the Vehicle Battery Port on the charger. 5. Connect the Output Cable from the Portable Power Station Port of the charger to the
extra battery port of the power station or extra battery.
Make sure that the Input Cable, Fuse Cable, and Output Cable are connected firmly as loose connections can cause cable melting.

Compatibility
Vehicle Starter Battery or RV House Battery Please make sure the vehicle starter battery or RV house battery is undamaged and rechargeable. The battery’s nominal voltage should be V or V.
Are there any requirements for car models? The overall voltage of some older or special car models is relatively low and the charger may fail to work as a result. In this case, use the EcoFlow app to adjust the start voltage of the charger.
Portable Power Station or Extra Battery The 800W Alternator Charger is connected to the extra battery port (XT ) of the EcoFlow portable power station or extra battery via the XT150 Output Cable. Please make sure your EcoFlow portable power station or extra battery has a port of this kind.

Environmental Requirements
To make sure the charger can operate normally, the location where the charger is placed or installed should meet the following requirements:
1. Be near to the portable power station or extra battery as the Output Cable is only 1m long and its length cannot be extended.
2. Has adequate connection space around the ports. 3. Be dry and tidy with a moderate temperature and away from heat sources. 4. Be away from flammable substances as the charger produces heat when it’s in use. 5. Be well- ventilated and not covered by blankets or anything that will hinder ventilation.

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Alternator Charger (800W) – User Manual 6. Be away from children and pets.
Install Your Charger (Optional)
For smooth rides, you can place the charger on the power station. For bumpy rides, it’s recommended to install the charger securely.

Method
You can use the included self-tapping screws to install the charger on the body or frame of your vehicle.

Steps
1. Use the installation board to locate the drilling positions and mark them with a marker. 2. Drill 2 holes of 5 mm diameter. 3. Fix the installation board to the back of the charger with three M5 screws. 4. Insert the self- tapping screws through the installation board and into the holes.

Method
You can use the included M6 bolts and nuts to install the charger on a board.

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Alternator Charger (800W) – User Manual

Steps 1. Use the installation board to locate the drilling positions and mark them with a marker. 2. Drill 2 holes of 6 mm diameter. 3. Fix the installation board to the back of the charger with three M5 screws. 4. Insert the M6 bolts through the installation board and into the holes. Then tighten the
M6 nuts.
Getting Started
Power On/Off
Power On: Short press once Power Off: Long press for s

To ensure that the charger will operate normally, please complete the wiring as instructed first, and then power on the power station or extra battery before you start your vehicle.
When you power on the charger for the first time, it will enter Charge Mode. In daily use, when you power it on, it will enter the same mode as it was powered off last time.
To make sure the charger will operate normally, please upgrade your portable power station or extra battery’s firmware to the latest version before use.

Bind Your Charger
EcoFlow offers a companion app for device management. By binding the charger to your EcoFlow account via the app, you can:

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Alternator Charger (800W) – User Manual 1. Check the charger’s status 2. Change operating mode 3. Adjust output power 4. Adjust start voltage
Binding Steps
1. Download the EcoFlow App at: https://download.ecoflow.com/app 2. Visit the EcoFlow app and log into your EcoFlow account. If you don’t have an account,
create one first. 3. Tap the “Add Device” button or the “+” icon in the top right corner to search for new
EcoFlow devices. 4. Turn on Bluetooth on your phone and bind the device to your EcoFlow account. 5. Connect to the Internet (optional).
After connecting the charger to the Internet, you can manage the charger from afar. If Internet connection is not available, you can manage the charger via Bluetooth.
Unable to discover your charger via Bluetooth? Follow the instructions in the “How to Unbind” section to reset the charger’s Bluetooth and then try to bind again.
How to Unbind You can unbind via the app or the Power Button on the charger. To unbind via the button, follow these steps:

1. Power off the portable power station or extra battery. 2. Long press the Power Button for 3s to power off the charger. 3. Wait for several seconds and then long press the Power Button for 5s. When the LED
indicator turns solid yellow, unbinding begins. When the indicator turns into another color, unbinding is complete.
How to Switch Mode and State

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Alternator Charger (800W) – User Manual

You need to go to the device detail page on the app and tap on a mode icon to change mode.

To switch between working or standby state, tap the toggle button.
Charge Mode
Power Flow: Alternator Vehicle Starter Battery or RV House Battery Alternator Charger Portable Power Station or Extra Battery Maximum Power: 800W

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Alternator Charger (800W) – User Manual With the portable power station or extra battery powered on, when your vehicle is in motion, the charger can use the alternator’s redundant power to charge the portable power station or extra battery. In Charge Mode, the actual output power is influenced by the motion state and the model of the vehicle. To prevent the vehicle starter battery or RV house battery from overdischarging, in Charge Mode, the charger will measure the voltage of the battery. If the measured value is lower than the charger’s start voltage, the charger will stop working. If the charger remains idle in Charge Mode for over 48h, it will automatically power off.
For your driving safety, in Charge Mode, if the vehicle is in motion, it is recommended not to change the operating mode.
Battery Maintenance Mode
Power Flow: Portable Power Station or Extra Battery Alternator Charger Vehicle Starter Battery Default Maximum Power: 100W

After powering on the portable power station or extra battery, you can use the charger to keep your starter battery charged at an optimal level over an extended period of time. It helps extend the lifespan of the battery and ensures that it is ready for use when needed.
Reverse Charge Mode
Power Flow: Portable Power Station or Extra Battery Alternator Charger Vehicle Starter Battery or RV House Battery Maximum Power: 800W

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Alternator Charger (800W) – User Manual

With the portable power station or extra battery powered on, the charger will charge the vehicle starter battery or RV house battery with a maximum power of 800W.
How to Unplug Cables

To unplug the Input Cable or Output Cable, follow these steps:
1. Power off the portable power station or extra battery. 2. Power off the charger. 3. Use the included cable puller to unplug the cable.

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Alternator Charger (800W) – User Manual
Troubleshooting
LED indicator is red.
Check app interfaces for error details. Wiring is complete but charger won’t power on.
Ensure correct polarity connection between the charger and the vehicle starter battery or RV house battery. Verify that all terminals of the cables are connected firmly. Verify that the nominal voltage of the vehicle starter battery or RV house battery is 12V or 24V. Check whether the negative terminal of the Input Cable is connected to the negative terminal of the starter battery. If yes, connect the negative terminal of the Input Cable to the chassis and try to power on the charger again. In Charge Mode, the charger is working but the power station or extra battery won’t charge.
Upgrade the firmware of your portable power station or extra battery to the latest version in the app. Check whether you’ve set a charge limit for your power station in the app. Output power doesn’t reach the maximum.
Check whether you’ve set the output power of the charger in the app. The alternator’s output may be low. Boost its output (e.g. by pressing the accelerator) and then try again. In Charge Mode, the output power fluctuates dramatically.
The reason could be that a battery sensor module is connected to the negative terminal of the starter battery. Connect the negative terminal of the Input Cable to the chassis and try again. Power station or extra battery turns off after putting the charger into standby state.
Upgrade the firmware of your portable power station or extra battery to the latest version in the app. The connected WAVE add-on battery won’t charge. Once a WAVE 2 add-on battery is connected, the charger will initiate the device recognition process. Please wait for around 1 minute. When recognition is finished, charging will begin.
If the problem persists, please contact technical support.
Maintenance
1. Inspect the cables every month and ensure that the terminals are tight. Look out for cracks, abrasions, and corrosion on the cables. If you notice any of this, stop using the cables immediately and follow the instructions in the “Cable Replacement” section.
2. Use dry, soft, and clean cloth or paper towels to clean the charger.
Cable Replacement

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Alternator Charger (800W) – User Manual
For continued protection against risk of fire, or electric shock, replace only with same type and ratings of fuse.

1. To replace the Output Cable, purchase new cables from EcoFlow’s official sales channels.
2. To replace the Input Cable, Fuse Cable, or Fuse, consult EcoFlow’s official customer service for purchase suggestions and ask a professional for replacement.

Input Cable Size: 6 AWG

Fuse Cable Size: 6 AWG

Fuse Rated Current: 125A

What’s in the Box

a. EcoFlow Alternator Charger
Cables b. Input Cable (5m) c. XT150 Output Cable (1m) d. Fuse Cable
Installation Kits e. Installation Board f. M5 Screw ×3 g. ST5.5 Screw ×2 h. M6 Bolt×2 i. M6 Nut ×2
Others j. Cable Puller k. Quick Start Guide & Safety Instructions & Warranty Card

Specifications

Model

EF-FC-301-1

Net Weight

Approximately 2.3 kg

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Alternator Charger (800W) – User Manual

Model

EF-FC-301-1

Dimensions (W × D × H)

242×194×35 mm (9.5×7.6×1.4 inch)

Wi-Fi

Frequency: 2412MHz-2472MHz Maximum output power: 18.22dBm

Bluetooth

Frequency: 2402MHz-2480MHz Maximum output power: 7.89dBm

Charge Mode

Input: 12V/24V(11V-31V), 76A Max. Output: 40V-60V, 800W Max.

Battery Maintenance Mode

Input: 40V-60V, 3A Max. Output: 13.8V/27.6V, 100W Max.

Reverse Charge Mode

Input: 40V-60V, 21A Max. Output: 13.8V/27.6V, 800W Max.

Rated Current of Fuse

125A

Protection Type

Reverse polarity protection/Overcurrent protection/Short circuit protection/Overvoltage and undervoltage protection (Provided with integral protection against overloads)

Operating Temperature

20 to 60(4 to 140)

Storage Temperature

30 to 70(22 to 158)

Operating Humidity

95%

Storage Humidity 95%

Safety Instructions
Wiring and Installation
1. It’s recommended that the wiring is performed by a professional. 2. Wear personal protective equipment (including protective goggles and gloves) during
wiring and installation. 3. It’s recommended to complete wiring before starting the vehicle and turning on the
charger. 4. Connect the fuse cable and the positive terminal of the input cable to a torque of 3 to
4 Nm. Insufficient torque will lead to a loose connection and cable melting. A torque higher than 6 Nm will break the fuse. 5. Follow these steps when connecting the input cable:
Connect the ring terminal of the fuse cable to the positive terminal on the vehicle starter battery or RV house battery. Connect the other end of the fuse cable to the positive terminal of the input cable. Ground the negative terminal of the input cable to the chassis of the vehicle or directly to the RV house battery’s negative terminal (if you are connecting it to an RV). Connect the input cable to the vehicle battery port on the charger.
5. Make sure that the input cable, fuse cable, and output cable are connected firmly as loose connections can cause cable melting.
6. Avoid reversing the polarity of the positive and negative connections when connecting the input cable and the fuse cable to the vehicle starter battery or RV house battery.

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Alternator Charger (800W) – User Manual
7. When wiring, avoid high temperature, sharp, and friction-prone areas, and securely fasten the cables to avoid cable wear or loose connections caused by cable movement.
8. Refer to the specifications of the vehicle starter battery or RV house battery and make sure that its nominal voltage is 12V or 24V. Always observe the safety instructions of the battery during use.
9. Do not use the charger with damaged or non-rechargeable batteries. 10. Power off the charger and disconnect it before changing the wiring each time. 11. Make sure the screws are tightened to the specified torque during installation (M5: 3
Nm; ST5.5: 4 Nm; M6: 9 N*m). 12. CAUTION: To reduce the risk of fire, use only battery packs that include the battery
management system and all necessary protection for the battery pack integral to the pack.
Environmental Requirements
1. Install and use the charger in a dry and tidy environment with a moderate temperature. 2. Keep the charger away from heat sources and wet environments. 3. Keep the charger away from flammable substances as the charger produces heat when
it’s in use. 4. Use the charger in an area with good ventilation and pay attention not to cover the
charger with blankets or anything that will hinder ventilation. 5. Do not wet the charger, or soak it in water or any other liquids. 6. Keep children and pets away from the charger.
Daily Use
1. Power off the charger before plugging or unplugging cables. 2. Inspect the cables every month and ensure that the terminals are tight. Look out for
cracks, abrasions, and corrosion on the cables. If you notice any of this, stop using the cables immediately and follow the instructions in the “Cable Replacement” section. 3. Avoid prolonged contact with the charger when it is in use. 4. Use dry, soft, and clean cloth or paper towels to clean the charger. 5. Contact EcoFlow’s official customer service if the charger needs repair. 6. Do not disassemble the charger yourself. Otherwise, the charger may be damaged and the warranty will be voided.
In Case of Emergency
1. In case of emergency, take precautions against electric shock (wear insulating gloves, for instance) before touching the charger.
2. If the charger gets wet, stop using it immediately and refrain from further operation or powering it on. Place the charger in a secure, waterproof, and well-ventilated area, then contact EcoFlow’s official customer service for assistance.
3. If the charger falls into water, place it in a secure, waterproof, and well-ventilated area, and keep it away from contact until it is completely dry. The dried charger should not be used again and must be properly disposed of according to local laws and regulations.
4. If the charger catches fire, we recommend that you use the fire extinguishers in the following order: water or water mist, sand, fire blanket, dry powder, and finally a carbon dioxide fire extinguisher.
5. If the charger is overturned and severely damaged, wear insulating gloves to turn it off, and then place the charger in an open area far from flammable materials and people, and dispose of it according to local laws and regulations.
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