---
title: "Nema 6-20 Extension Cord — $44K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/nema-6-20-extension-cord"
last_updated: "2026-08-08T23:00:04.963Z"
locale: en
meta:
description: "Niche score 46/100 · $44K/yr market · 20K searches/yr · $36.30 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · $44K/yr market · 20K searches/yr · $36.30 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Nema 6-20 Extension Cord — $44K/yr Amazon US Niche (2026) - Flapen"
---
# **nema 6-20 extension cord**
**Skip it**
A small market ($44K/yr) — this niche doesn't clear our bar today.
Market size 11Growth 41Conversion 67Competition 61Returns 22Price range 91Avg price 95Brand share 42Review moat 87Quality gap 19
**Avg price**
**Incredible****$36.30**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$12.20–$73.97**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****269.77**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****6.0%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Good****48%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Okay****80%**
top-5 brand share — brands hold most of the demand
**Growth**
**Okay****+12.6%**
90-day search growth — must beat 0% to launch
**Returns**
**Bad****5.8%**
return rate — above 5% kills the launch gate
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$44K**
$44K/yr · 20K searches
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, nema 6-20 extension cord is a $44K/yr Amazon United States market (20K searches/yr). The top 5 brands hold 80% of demand. Verdict: Skip it — 46/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **nema 6-20 extension cord market data**
- **Units sold / yr**
- **1K–1K**
- avg 0–100/product
- **Revenue / yr**
- **$36K–$45K**
- units × avg price
- **Conversion rate**
- **6.0%**
- **Avg BSR**
- **#711**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **88%**
- **Out of stock**
- **11.9%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **212 days**
## **Competition & brand share**
The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▲rising
**Sellers**
**18**
**Top-5 brand share**
**80%**
Top 20: 100%
**Top-5 click share**
**48%**
Top 20: 93%
**Open market**
**15%**
- Parkworld36% - PLUGTUL15% - Saysurey11% - oviitech10% - M1A28% - EP6% - Open — no brand owns it (6 brands, 15%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +12.6% search growth over the last 90 days.
600400Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/nema-6-20-extension-cord/trend)
## **Top nema 6-20 extension cord products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$2K10%$4K15%$7K20%$9K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Parkworld NEMA 6-20 Extension Cord 6-20P to 6-20R (T Blade Female Also for 6-15R Adapter) 250V 20A 5000W UL Listed (25FT)**Parkworld**$44.93**4.8★1,012 rev](https://www.amazon.com/dp/B07K2R513T) [2**NEMA 6-20 Plug to 6-20 Connector Extension Power Cord - 25FT 20A/250V 12/3 SJTW T Blade - Black**oviitech**$39.05**4.8★290 rev](https://www.amazon.com/dp/B07TCNT8ZB) [3**Parkworld NEMA 6-20 Extension Cord 6-20P to 6-20R (T Blade Female Also for 6-15R Adapter) 250V 20A 5000W UL Listed (6FT)**Parkworld**$24.28**4.8★1,012 rev](https://www.amazon.com/dp/B07K2QDSY1) [4**PLUGTUL NEMA 6-20 Extension Cord 25FT Heavy Duty Extension Cord with Lighted Outlet 20A/250V 12Gauge SJTW ETL Listed 6-20P to 6-20R (T Blade Female Adapter) - Black**PLUGTUL**$36.12**4.8★34 rev](https://www.amazon.com/dp/B0F9L68VZL) [5![M1A2 NEMA 6-20 Extension Cord 6-20P to 6-20R [Also for 6-15R Adapter] Tesla Mobile EV Level 2 Charging Heavy Duty 220 Volts 20 Amp 25FT ETL Listed](https://m.media-amazon.com/images/I/41b+73aQv1L.jpg)**M1A2 NEMA 6-20 Extension Cord 6-20P to 6-20R \[Also for 6-15R Adapter\] Tesla Mobile EV Level 2 Charging Heavy Duty 220 Volts 20 Amp 25FT ETL Listed**M1A2**$43.25**4.8★47 rev](https://www.amazon.com/dp/B0CVVZH1C8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Saysurey 50 ft Nema 6-20 Extension Cord Nema 6-20p Male Plug to 6-20r/6-15r Female Receptacle 20 Amp T-Blade Outlet Extension Power Cord with Waterproof Sockets Heavy Duty 12/3 Awg 250v 5000w**Saysurey**$70.09**34 rev8mo ago](https://www.amazon.com/dp/B0G3N8N787) [**Saysurey NEMA 6-20 Extension Cord NEMA 6-20P Male Plug to 6-20R/6-15R Female Receptacle 20 Amp T-Blade Outlet Extension Power Cord with Waterproof Sockets Heavy Duty 12/3 AWG 250V 5000W(16 ft)**Saysurey**$34.41**34 rev8mo ago](https://www.amazon.com/dp/B0G3N6GVDY) [**Saysurey 6.6 ft Nema 6-20 Extension Cord Nema 6-20p Male Plug to 6-20r/6-15r Female Receptacle 20 Amp T-Blade Outlet Extension Power Cord with Waterproof Sockets Heavy Duty 12/3 Awg 250v 5000w**Saysurey**$19.50**34 rev8mo ago](https://www.amazon.com/dp/B0G3NB3QY2) [**Saysurey 25 ft Nema 6-20 Extension Cord Nema 6-20p Male Plug to 6-20r/6-15r Female Receptacle 20 Amp T-Blade Outlet Extension Power Cord with Waterproof Sockets Heavy Duty 12/3 Awg 250v 5000w**Saysurey**$42.85**34 rev8mo ago](https://www.amazon.com/dp/B0G3N65GT9) [**FIRMERST 20 AMP 10 FT 12 Gauge Extension Cord NEMA 6-20P to 6-20R 250 Volt**FIRMERST**$28.94**102 rev10mo ago](https://www.amazon.com/dp/B0FQTY2DW8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Saysurey 50 ft Nema 6-20 Extension Cord Nema 6-20p Male Plug to 6-20r/6-15r Female Receptacle 20 Amp T-Blade Outlet Extension Power Cord with Waterproof Sockets Heavy Duty 12/3 Awg 250v 5000w**Saysurey**$70.09**4.8★**▲ 223%**](https://www.amazon.com/dp/B0G3N8N787) [**EP 25 Ft 12/3 SJTW Outdoor Extension Cord NEMA 6-20 P/R 20A 250V Yellow**EP**$30.48**4.2★**▲ 196%**](https://www.amazon.com/dp/B0F6Y9RLDD) [![MECMO 6ft 15 Amp Household to 20 Amp AC Power Adapter Waterproof Cable 12AWG SJTW [4 in 1] NEMA 5-15P to 5-15R 5-20R 6-15R 6-20R T Blade Adaptor 15A 125V to 20A 250V 15Amp to 20Amp Extension Cord](https://m.media-amazon.com/images/I/41hKWfZmDZL.jpg)**MECMO 6ft 15 Amp Household to 20 Amp AC Power Adapter Waterproof Cable 12AWG SJTW \[4 in 1\] NEMA 5-15P to 5-15R 5-20R 6-15R 6-20R T Blade Adaptor 15A 125V to 20A 250V 15Amp to 20Amp Extension Cord**MECMO**$19.35**4.8★**▲ 160%**](https://www.amazon.com/dp/B0DPC1QKHP) [**Saysurey 6.6 ft Nema 6-20 Extension Cord Nema 6-20p Male Plug to 6-20r/6-15r Female Receptacle 20 Amp T-Blade Outlet Extension Power Cord with Waterproof Sockets Heavy Duty 12/3 Awg 250v 5000w**Saysurey**$19.50**4.8★**▲ 148%**](https://www.amazon.com/dp/B0G3NB3QY2) [**EP 6 Ft 12/3 SJTW Outdoor Extension Cord NEMA 6-20 P/R 20A 250V Yellow**EP**$12.20**4.2★**▲ 144%**](https://www.amazon.com/dp/B0F6Y9PVVN)
**~~View all trending →~~**
## **What buyers say about nema 6-20 extension cord**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**15%
*“The build quality is incredible—it feels sturdy, heavy-duty, and professional right out of the box”*
**Advertised Vs Actual Product**15%
*“as advertised”*
**Durability**9%
*“feels durable and well made”*
**Charging**7%
*“Works to charge my car”*
**Strength**7%
*“Feels very sturdy”*
**Value For Money**6%
*“Good value in my opinion”*
**Efficiency**5%
*“Worked great”*
**Weight Heavy**4%
*“Worth it heavy duty”*
**Ease Of Use**4%
*“Using it is as simple as it gets”*
**Material Quality**4%
*“The cord is heavy duty with good solid plugs on each end”*
### **What buyers complain about **
**Advertised Vs Actual Product**25%
*“It did not match description”*
**Strength**13%
*“Very low resistence”*
**Leak-Proof**8%
*“power leaks are a problem”*
**Color**6%
*“The yellow color makes it impossible to trip over”*
### **Top return reasons **
**Compatibility-Overall**34%
**Size-Overall**16%
**Add-Ons/Attachments**16%
**Socket/Port/Plug**12%
**Functionality-Overall**5%
**Advertised Vs Actual Product**4%
**Connectivity-Overall**3%
**Value For Money**2%
**Defective Material/Parts**1%
**Charging**1%
## **Common questions**
- **Is nema 6-20 extension cord profitable to sell on Amazon United States?**
- The niche generates $44K/yr across 26 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is +12.6%. Flapen's verdict: Skip it (46/100).
- **How competitive is the nema 6-20 extension cord niche?**
- 12 brands and 18 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 80% of demand.
- **What do buyers complain about in nema 6-20 extension cord?**
- Top complaints mined from reviews: Advertised Vs Actual Product, Strength, Leak-Proof. The return rate is 5.8% — above our launch gate.
- **When does demand for nema 6-20 extension cord peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the nema 6-20 extension cord niche?**
- Listings span $12.20–$73.97; the average listing price is $36.30 (sweet spot $15–$100). The average incumbent carries 270 reviews — the moat a new listing must climb.
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