The EcoFlow AC Generator Charging Adapter allows you to charge your EcoFlow DELTA Pro Ultra using generators with a NEMA L14-30R port.
EcoFlow DELTA Pro Ultra Generator Charging Adapter — NEMA L14-30R Direct Connect
Charge Your Delta Pro Ultra From Any L14-30R Generator
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$60.95
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In the box
- EcoFlow AC Generator Charging Adapter
Charge Your Delta Pro Ultra From Any L14-30R Generator
When the sun isn't enough and the grid is down, your off-grid setup needs a reliable backup charge path. This adapter connects your EcoFlow DELTA Pro Ultra directly to any generator equipped with a NEMA L14-30R port, giving you field-tested flexibility to keep your battery bank topped off during extended cloudy stretches or winter storms. It's a purpose-built link in your grid-independent power chain — no guesswork, no mismatched connectors.
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NEMA L14-30R Input
Delta Pro Ultra Fit
Extension Ready
Worry-Free Connection
$60.95
Investment
4.9 ft
Optional Extension
L14-30R
Generator Port
No More Dark-Outs When Solar Runs Low
The real threat to your grid-independent setup isn't just the grid going down — it's watching your battery bank drain during extended overcast days with no way to recharge. This adapter closes that gap by connecting your generator directly to your DELTA Pro Ultra through a NEMA L14-30R port. At Off Grid Vault, every component we carry is vetted to work with your system — no mix-and-match guesswork, no wondering whether the plug fits. This adapter is purpose-built for the DELTA Pro Ultra, so you connect and charge without second-guessing compatibility.
Built for One System, No Compromises
Most generator adapters are generic parts that may or may not work with your specific power station. This one is designed specifically for the EcoFlow DELTA Pro Ultra — not a universal fit that "should work." When you're relying on generator backup during a multi-day outage, the last thing you want is a connection that's loose, intermittent, or incorrectly wired. A purpose-built adapter means a secure, worry-free link between your generator's L14-30R outlet and your DELTA Pro Ultra, so you can focus on keeping your home running instead of troubleshooting connections in the dark.
Extend Your Generator Reach When You Need It
Sometimes your generator sits farther from your power station than a standard cable allows. That's where the optional EcoFlow NEMA L14-30R to L14-30P Generator Cord comes in — a 4.9 ft extension that gives you flexibility in how you position your setup. Whether your generator lives on a covered porch, in a shed, or at the edge of your property for noise management, this adapter is the starting point for building out the connection length your specific layout demands. Off-grid setups aren't one-size-fits-all, and your cabling shouldn't be either.
Compatibility Check
Confirm your setup matches these conditions before ordering.
- Generator has a NEMA L14-30R receptacle
- Powerstation is EcoFlow DELTA Pro Ultra
- Extension cord (if used) is NEMA L14-30P to L14-30R
When You Need This Adapter
Bridges the gap between your generator and your Delta Pro Ultra when solar alone can't keep up.
Extended Storm Backup
Off-Grid Build Charging
Winter Low-Sun Periods
Full specifications
At a glance
- Warranty
- See product page
Full specifications5 data points across 4 categories
Dimensions
| Length | See product page |
|---|
Power & Performance
| Input Connector | NEMA L14-30R |
|---|---|
| Output Compatibility | EcoFlow DELTA Pro Ultra |
Materials
| Construction | See product page |
|---|
Compliance & Warranty
| Warranty | See product page |
|---|
The Off Grid Vault Promise
Every product we carry earns its place on our shelf. Here's what that means for you.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days in original packaging.
Free ShippingShips free to your door. No minimums, no thresholds, no surprise charges at checkout.
Authorized Dealer StandardsWe vet every product for build quality and real-world performance. If it doesn't meet our standards, it doesn't make the cut.
★★★★★
“Picked this up before a week-long overcast stretch at my cabin. Plugged my Predator generator straight into the DELTA Pro Ultra and it charged without any issues. Exactly what I needed — no guesswork, no loose connections. Off Grid Vault had it shipped fast too.”
Frequently Asked Questions
This adapter is designed for any generator equipped with a NEMA L14-30R receptacle — that's a standard 30-amp twist-lock outlet found on most mid-to-large portable generators. It doesn't need to be an EcoFlow generator. As long as your generator has that port, this adapter will connect it to your DELTA Pro Ultra for charging.
A standard extension cord won't connect to a NEMA L14-30R port — that's a twist-lock receptacle, not a standard household outlet. Using the wrong adapter or an improvised connection risks loose contacts, overheating, and potential damage to your DELTA Pro Ultra. This purpose-built adapter ensures a secure, correctly wired connection designed for the power station it's pairing with.
You need a generator with a NEMA L14-30R outlet and your EcoFlow DELTA Pro Ultra. That's the complete setup. If your generator is positioned more than a few feet from your power station, you may want the optional EcoFlow NEMA L14-30R to L14-30P Generator Cord (4.9 ft) for added reach, but it's not required for the adapter to function.
Yes. Off Grid Vault is an authorized dealer, which means any warranty claims on this adapter are handled directly through us — not through a faceless ticket queue. You're buying from a retailer that stands behind every product it carries, with real support from people who actually build and understand off-grid power systems. That matters when you're investing in equipment your home depends on.
We offer a 30-day performance guarantee. If the adapter doesn't perform as specified and connect your DELTA Pro Ultra to your generator's L14-30R port, return it uninstalled and in original packaging for a full refund. We also offer free system design consultations if you're unsure about any part of your off-grid configuration — our engineers can confirm compatibility before you buy.
Ships free with no conditions and no minimum order threshold. Whether you're purchasing this adapter on its own or bundling it with a larger power system, standard shipping is included at no extra cost. For full system packages, LTL freight with threshold delivery is also covered — no surprise freight charges appear at checkout. That's how Off Grid Vault operates on every order.
The Off Grid Vault Promise
Every product we carry earns its place on our shelf. Here's what that means for you.
30-Day Performance Guarantee
If it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days in original packaging.
Free Shipping
Ships free to your door. No minimums, no thresholds, no surprise charges at checkout.
Authorized Dealer Standards
We vet every product for build quality and real-world performance. If it doesn't meet our standards, it doesn't make the cut.
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About ecoflow cable
ecoflow is a trusted manufacturer of premium cable. OffGridVault is an authorized dealer offering the full ecoflow lineup with free delivery, price match guarantee, and expert support.
View all ecoflow products →
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