Understanding the EcoFlow Alternator Charger
The EcoFlow Alternator Charger is a sophisticated DC-to-DC charger, designed for efficiently replenishing your EcoFlow lithium power packs while on the move.
Generally, trucks rated for over 7,000 lbs towing, equipped with a 7-way connector, possess alternators capable of handling the charger’s demands, often exceeding 210 amps.
This device allows you to leverage your vehicle’s alternator to charge your EcoFlow unit, offering a convenient power solution during road trips and off-grid adventures.
What is the EcoFlow Alternator Charger?
The EcoFlow Alternator Charger represents a specialized DC-to-DC charging solution, meticulously engineered to replenish EcoFlow power stations directly from a vehicle’s alternator. Unlike conventional charging methods, this charger optimizes the power transfer, ensuring efficient and rapid charging while you’re on the go. It’s particularly beneficial for overlanders, campers, and anyone seeking extended power autonomy away from traditional grid connections.
This 800W charger isn’t simply a power adapter; it’s a sophisticated device capable of accepting up to 130 amps from the vehicle’s alternator – far exceeding its 13.3 amp draw at 800W/60V. The vehicle’s alternator can actually output up to 1,775W (130A x 13.5V), demonstrating the charger’s efficient power utilization. It’s designed to work seamlessly with EcoFlow’s Delta Pro series, though requires a specific adapter for optimal integration.
Essentially, it transforms the fluctuating DC output of your vehicle’s alternator into a stable, compatible charging source for your EcoFlow power station.
Compatibility with Vehicle Alternators
Generally, compatibility with vehicle alternators is quite broad, especially in trucks designed for heavier towing. If your truck is rated to tow over 7,000 lbs and is equipped with a standard 7-way connector, there’s a high probability its alternator can handle the EcoFlow charger’s demands. These vehicles typically feature alternators outputting 210 amps or more, and some even boast dual alternator setups, common in 350/3500 class trucks and larger.
The 7-way connector itself provides a 30A auxiliary supply, further indicating sufficient power capacity. The EcoFlow alternator charger, while capable of accepting a high input, only requires around 13.3 amps to draw 800 watts at 60V. This means the vehicle’s alternator isn’t being overly stressed, even at peak charging times.
However, verifying your specific vehicle’s alternator output is always recommended for optimal performance and longevity.
Truck Alternator Capacity (7000+ lbs Towing)
Trucks capable of towing over 7,000 pounds generally possess robust alternator systems designed to handle significant electrical loads. These vehicles, often 350/3500 class and up, frequently feature alternators delivering 210 amps or higher. Many are even equipped with dual alternator setups, providing substantial power redundancy and capacity for accessories.
A standard 7-way connector, commonly found on these trucks, includes a dedicated 30A auxiliary power supply, indicating ample reserve for charging the EcoFlow unit. The vehicle’s alternator can potentially output up to 1,775 watts (130A x 13.5V), significantly exceeding the EcoFlow alternator charger’s maximum draw of 800 watts.
This substantial capacity ensures efficient charging without overburdening the vehicle’s electrical system, making it a reliable power source on the road.

Installation Process
Installing the EcoFlow Alternator Charger involves careful cable routing, both externally and internally, utilizing a bulkhead fitting for a secure cabin entry.
Proper cable storage, like behind the rear seat, is crucial, remembering to avoid potential pinch points during the installation procedure.
Cable Routing – Exterior
Exterior cable routing demands a secure and protected pathway from the vehicle’s alternator to the cabin. Begin by carefully running the cable along the vehicle’s frame, prioritizing existing channels or mounting points to avoid damage.
The passenger side frame is often favored for its accessibility and reduced exposure to heat sources. Ensure the cable is adequately shielded from road debris, sharp edges, and extreme temperatures.
Utilize robust cable ties or clamps at regular intervals to maintain a secure fit and prevent chafing. Pay close attention to areas near exhaust components and suspension parts, providing ample clearance to avoid melting or wear.
Before drilling for the bulkhead fitting, thoroughly inspect the chosen location for any hidden wiring or structural elements. A clean, well-protected entry point is essential for a reliable and safe installation.
Cable Routing – Interior (Passenger Side Frame)
Interior cable routing, following the passenger side frame, requires careful attention to detail. After passing through the bulkhead fitting, run the cable downwards, closely following the existing wiring harnesses for protection and organization.

Avoid routing the cable near any moving parts, such as pedals or steering column components. Secure the cable at regular intervals using cable ties, ensuring it doesn’t interfere with vehicle operation.
Consider the proximity to heat sources like the heater core and exhaust manifold, providing sufficient clearance to prevent damage. The area near the subwoofer is a potential drilling location, but requires careful inspection for existing wiring.
Maintain a clean and organized cable path, avoiding sharp bends or kinks that could compromise the cable’s integrity. Prioritize safety and functionality throughout the routing process.
Bulkhead Fitting Installation
Installing the bulkhead fitting is a crucial step for safely transitioning the charging cable from the engine compartment into the vehicle’s cabin. Select a suitable location, typically in the upper area near the subwoofer, ensuring it’s accessible and free from obstructions.
Carefully drill a hole of the appropriate diameter for the fitting, taking precautions to avoid damaging existing wiring or vehicle components; Deburr the edges of the hole to prevent chafing of the cable.
Insert the bulkhead fitting into the hole, securing it tightly with the provided hardware. Apply sealant around the fitting to create a watertight seal, protecting against moisture and corrosion.

Ensure the fitting is properly grounded to the vehicle’s chassis, minimizing the risk of electrical interference. Route the cable through the fitting, ensuring a snug but not overly tight fit.
Cable Storage Solutions (Behind Rear Seat)
A practical cable storage solution involves utilizing the space behind the rear seat, specifically near the hinge mechanism. This area often provides enough slack to accommodate the alternator charger cable while keeping it readily accessible.
Carefully position the cable end behind the rear seat hinge, ensuring it doesn’t interfere with seat operation or create a pinch point hazard. Secure the cable to prevent it from shifting during vehicle movement.
This arrangement allows for sufficient cable length to connect the alternator charger to the EcoFlow unit in various locations within the truck, adapting to different packing configurations.
Important safety note: Always be mindful of potential pinch points when storing the cable near moving parts. Regularly inspect the cable for any signs of damage or wear.

Electrical Considerations
Understanding electrical demands is crucial; your vehicle’s alternator can output significantly more power than the EcoFlow charger requires, around 1775W versus 800W.
Relay current ratings must align with the cable’s current-carrying capacity, ensuring safe and efficient power transfer from the alternator to the charger.
Alternator Output vs. Charger Input
A key consideration is the disparity between your vehicle’s alternator output and the EcoFlow alternator charger’s input requirements. Many vehicle alternators, particularly in trucks rated for heavy towing (7000+ lbs), are capable of producing substantial power – often 130 amps or more at 13.5 volts.
This translates to a potential output of up to 1,775 watts (130A x 13.5V). However, the EcoFlow alternator charger, even at its maximum capacity, only draws approximately 13.3 amps to achieve an 800-watt charge at 60V.
This difference isn’t a mismatch, but rather highlights the charger’s efficiency. The alternator isn’t being strained to its limit; it’s providing the necessary power without being overloaded. It’s important to remember that the charger regulates the input, drawing only what it needs from the alternator, ensuring a safe and stable charging process.
Current Rating of Relays
Selecting the correct relay is crucial for a safe and functional EcoFlow alternator charger installation. The current rating of the relay directly correlates to the current-carrying capacity of the cabling running from your vehicle’s crank battery or alternator to the relay itself.
This rating must be sufficient to handle the maximum current draw of the charger without overheating or failing. Given that the EcoFlow alternator charger is a relatively expensive DC-to-DC charger, protecting it with a properly sized relay is paramount.
Ensure the relay’s amperage rating exceeds the charger’s maximum input current, providing a safety margin. A higher rating doesn’t necessarily mean better; it simply means the relay can handle a larger load. Prioritize a relay specifically designed for automotive applications and capable of handling continuous DC current.
Understanding DC-to-DC Charging
DC-to-DC charging is the process of converting DC voltage from one level to another. In the context of the EcoFlow alternator charger, it transforms the 12V or 24V DC power from your vehicle’s alternator into the specific voltage required by your EcoFlow power station (typically around 60V).
It’s important to understand that your vehicle’s alternator can output significantly more power than the EcoFlow charger actually draws. For example, an alternator producing 130 amps at 13.5V delivers 1,755 watts, while the charger only requires 13.3 amps to achieve an 800-watt charge.
This difference highlights the charger’s efficiency in regulating the power flow, preventing overcharging and ensuring optimal battery health. Essentially, the charger intelligently draws only the power it needs from the alternator.

EcoFlow System Integration
Integrating the EcoFlow Alternator Charger requires the Smart Generator Adapter (part 70) to connect to the Delta Pro’s extra battery port for charging.
Unfortunately, this adapter has experienced prolonged stock shortages, hindering full functionality for many Delta Pro 3000 users currently.
Proper connection ensures seamless power transfer and optimal charging performance within the EcoFlow ecosystem.
Delta Pro and the Smart Generator Adapter
The EcoFlow Delta Pro is the primary power station intended for use with the Alternator Charger, but a crucial component is required for successful integration: the Smart Generator Adapter, identified as part number 70.
This adapter facilitates connection between the Alternator Charger and the Delta Pro’s extra battery port, enabling the charging process. However, a significant issue has emerged – consistent and prolonged stock shortages of this essential adapter.
Many users report difficulty acquiring the adapter, rendering the 3000 Delta Pro and 600W Alternator Charger combination unusable until availability improves. Without it, the charger cannot effectively communicate with and charge the Delta Pro.
The adapter essentially bridges the connection, allowing the Delta Pro to recognize the incoming power from the vehicle’s alternator via the charger. It’s a critical, yet currently scarce, piece of the puzzle for a fully functional mobile charging setup;
Users are advised to regularly check EcoFlow’s website and authorized retailers for updates on adapter availability.
Adapter Availability (Part 70)
The Smart Generator Adapter (Part 70), essential for connecting the EcoFlow Alternator Charger to the Delta Pro’s extra battery port, is currently experiencing significant and frustrating stock issues. Reports indicate months-long periods of unavailability, severely impacting users eager to utilize the charging system.
This shortage prevents a functional setup, even with both the Delta Pro and the Alternator Charger in hand. EcoFlow has not provided a consistently clear timeline for restocking, leaving customers in a state of uncertainty.
Potential workarounds or alternative solutions are limited, emphasizing the adapter’s necessity. Regularly monitoring EcoFlow’s official website and authorized retailers is recommended, but success isn’t guaranteed.
The lack of availability has prompted considerable discussion within the EcoFlow community, with users sharing tips on locating the adapter and expressing their dissatisfaction. It remains a key obstacle to a seamless mobile power solution.
Checking frequently is the best course of action for those needing this part;
Extra Battery Port Connection
Connecting the EcoFlow Alternator Charger requires the aforementioned Smart Generator Adapter (Part 70) to interface with the Delta Pro’s extra battery port. This port is specifically designed to accept external charging sources, expanding the Delta Pro’s charging capabilities beyond standard AC and solar inputs.
Once the adapter is secured, the alternator charger’s output cable plugs directly into the adapter. This establishes the DC-to-DC connection, allowing the vehicle’s alternator to feed power into the Delta Pro’s battery management system.
Ensure a firm and secure connection at both ends – the adapter and the charger – to prevent interruptions during charging. Proper connection is vital for efficient and safe power transfer.
Without the adapter, the alternator charger cannot physically connect to the Delta Pro, rendering it unusable. This highlights the adapter’s critical role in the overall system functionality.
Double-check the connection before starting your vehicle.

Safety and Best Practices
Prioritize safety by being mindful of pinch points during cable routing, especially behind the rear seat. Select appropriately gauged wires and relays for optimal current capacity.
Always choose relays that match the cable’s current-carrying ability, ensuring a safe and reliable charging setup for your EcoFlow system.
Pinch Point Awareness
When routing the EcoFlow Alternator Charger cable, meticulous attention to potential pinch points is absolutely crucial for both safety and cable longevity. A particularly vulnerable area is behind the rear seat, where the cable end is often stored.
Users have discovered a convenient storage location utilizing the rear seat hinge, but this area presents a significant risk of the cable being compressed or damaged when the seat is adjusted or moved. Ensure sufficient slack is maintained to prevent strain on the cable when the seat is in various positions.
Regularly inspect the cable for any signs of wear, crimping, or damage, especially in areas prone to movement or contact with vehicle components. Prioritizing awareness of these pinch points will safeguard your investment and ensure a reliable charging experience.
Wire Gauge and Current Capacity
Selecting the appropriate wire gauge is paramount for the safe and efficient operation of the EcoFlow Alternator Charger. The wire must be capable of handling the substantial current draw, potentially reaching up to 130 amps from the vehicle’s alternator.
The current rating of the relay utilized in the system directly correlates to the cable’s current-carrying capacity, emphasizing the importance of a correctly sized relay. An 800W alternator charger, while a sophisticated DC-to-DC charger, demands robust wiring to prevent overheating and potential fire hazards.
Ensure the chosen wire gauge meets or exceeds the charger’s maximum current requirements, considering the length of the run and any voltage drop. Consulting a wiring chart or a qualified electrician is highly recommended to guarantee a safe and reliable installation.
Proper Relay Selection
Choosing the correct relay is crucial for a dependable EcoFlow Alternator Charger setup. The relay acts as a switch, enabling the alternator to efficiently charge the power station without straining the vehicle’s electrical system. Its current rating must accurately reflect the cable’s capacity, linking directly to the alternator and battery connection.
A relay with insufficient capacity can overheat, fail, or even pose a fire risk. Conversely, an excessively large relay might be unnecessarily expensive. The 800W charger, being a high-powered DC-to-DC solution, necessitates a relay capable of handling significant amperage.
Prioritize a relay designed for automotive applications, ensuring it can withstand the vibrations and temperature fluctuations inherent in a vehicle environment. Careful relay selection guarantees a safe and optimized charging experience.

Troubleshooting
If charging fails, verify adapter compatibility and connections. Issues may arise from the Smart Generator Adapter (part 70) being out of stock, hindering integration.
Confirm proper cable routing and relay function for optimal performance.
Charging Issues
Experiencing charging problems? First, double-check all connections, ensuring a secure fit between the alternator charger, the vehicle’s battery, and the EcoFlow unit. A common culprit is the unavailability of the necessary Smart Generator Adapter (Part 70), essential for connecting the alternator charger to the Delta Pro’s extra battery port.
Verify your vehicle’s alternator is functioning correctly and delivering sufficient voltage (around 13.5V). Remember, the EcoFlow alternator charger only requires 13.3 amps to draw 800 watts at 60V, well within the capacity of most truck alternators (often 130 amps or more).
Inspect the relay; its current rating should match the cable’s capacity. If issues persist, confirm the cable gauge is appropriate for the current draw to prevent voltage drop. Finally, review the pinch points along the cable route to ensure no damage has occurred.
Adapter Compatibility Problems
The most frequently reported issue centers around the Smart Generator Adapter (Part 70), a crucial component for integrating the EcoFlow Alternator Charger with the Delta Pro. Unfortunately, this adapter has been consistently out of stock for extended periods, rendering the charger unusable with the Delta Pro.
Without this adapter, you cannot connect the alternator charger to the Delta Pro’s extra battery port, effectively preventing charging; Check the EcoFlow website and authorized retailers for availability updates, as stock fluctuations are common.
Ensure you are purchasing the correct adapter – Part 70 is specifically designed for this purpose. Attempting to use alternative adapters may damage your equipment. If you’ve acquired the adapter, verify a secure connection at both ends.
