---
title: "L14-30r — $77K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/l14-30r"
last_updated: "2026-08-09T05:20:23.011Z"
locale: en
meta:
description: "Niche score 45/100 · $77K/yr market · 45K searches/yr · $25.98 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · $77K/yr market · 45K searches/yr · $25.98 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "L14-30r — $77K/yr Amazon US Niche (2026) - Flapen"
---
# **l14-30r**
**Skip it**
Soft demand (-46.3% this quarter) — this niche doesn't clear our bar today.
Market size 19Growth 2Conversion 72Competition 53Returns 60Price range 86Avg price 95Brand share 61Review moat 74Quality gap 18
**Avg price**
**Incredible****$25.98**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$6.89–$81.62**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****556.8**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****6.6%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****69%**
top-5 brand share — brands hold most of the demand
**Returns**
**Good****2.6%**
return rate — above 5% kills the launch gate
**Competition**
**Good****53%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Bad****$77K**
$77K/yr · 45K searches
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-46.3%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, l14-30r is a $77K/yr Amazon United States market (45K searches/yr). The top 5 brands hold 69% of demand. Demand peaks in Jan–Oct–Nov. Verdict: Skip it — 45/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **l14-30r market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$78K–$104K**
- units × avg price
- **Conversion rate**
- **6.6%**
- **Avg BSR**
- **#109**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **3.4%**
- **Avg brand age**
- **58 months**
- **Avg seller age**
- **163 days**
## **Competition & brand share**
The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**21 **▼falling
**Sellers**
**66**
**Top-5 brand share**
**69%**
Top 20: 100%
**Top-5 click share**
**53%**
Top 20: 90%
**Open market**
**28%**
- ELEGRP35% - Leviton16% - STARELO8% - RVINGPRO5% - Nilight5% - AIDA4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -46.3% search growth over the last 90 days.
5K3KSpike '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Oct, Nov · busiest ÷ quietest = 2.8×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/l14-30r/trend)
## **Top l14-30r search terms**
- **l14-30r**27K/yr-42.5%5.6% conv. - **nema l14-30r**9K/yr-36.6%4.6% conv. - **l14-30r receptacle**6K/yr-69.2%5.2% conv. - **l14 30r**2K/yr-61.2%4.3% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/l14-30r/search-terms)
## **Top l14-30r 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%$4K10%$8K15%$12K20%$15K1101001K10K 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**ELEGRP NEMA L14-30R Flush Mounting Locking Receptacle Twist Lock Socket/Outlet for Generator 30 Amp 125/250V 3 Pole 4 Wire Grounding Industrial Grade Heavy Duty UL Listed (1 Pack Black)**ELEGRP**$9.69**4.7★498 rev](https://www.amazon.com/dp/B08CXG2PQS) [2**ELEGRP NEMA L14-30R Locking Connector Generator Twist Lock Adapter Female Connector 30 Amp 125/250V 3 Pole 4 Wire Grounding Industrial Grade Heavy Duty UL Listed (1 Pack Black/White)**ELEGRP**$11.81**4.7★714 rev](https://www.amazon.com/dp/B08CXQ24K7) [3**Leviton 30 Amp 125/250 Volt Flush Mounting Locking Receptacle Industrial Grade Grounding V-0-MAX 2710 Black**Leviton**$18.63**4.8★625 rev](https://www.amazon.com/dp/B00002NATX) [4**STARELO 30 Amp Locking Female Plug Box NEMA L14-30C Generator Twist Lock Adapter Female Connector 125/250 Volt Outdoor dustproof and Weatherproof for generators Welding Machines etc.ETL Listed.**STARELO**$25.63**4.6★421 rev](https://www.amazon.com/dp/B0B6TV7574) [5**Nilight 30Amp L14-30P L14-30R Male Female Locking Plug and Connector Generator Twist Lock Plugs Adapter 125/250V ETL Listed Industrial Grade Heavy Duty for RV Camper Caravan Trailer**Nilight**$14.81**4.6★860 rev](https://www.amazon.com/dp/B0CQ4R9482)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Yomiuwo 1 Pack NEMA L1430R Flush Mounting Locking Receptacle 30 Amp Twist Lock L1430 Outlet 3-Pole 4-Wire 125/250V L1430R Plug Compatible Industrial L14 30R Receptacle UL Listed E309821**Yomiuwo**$9.99**35 rev11mo ago](https://www.amazon.com/dp/B0FN9KHQ4J) [**MECMO NEMA L14-30R Generator Locking Connector L14-30C Twist Lock 30 Amp 4 Prong Generator Female Plug Replacement 125/250 Volt 3 Pole 4 Wire Grounding Industrial-Strength Heavy Duty ETL Listed**MECMO**$11.47**19 rev1y ago](https://www.amazon.com/dp/B0FHBC7BWP) [**Yomiuwo 5 Pack L14-30R Receptacle Outlet 30 Amp 125/250V L14-30R Twist Lock Socket/Outlet for Generator 3 Pole 4 Wire Grounding Industrial Grade Heavy Duty UL Listed Black**Yomiuwo**$29.67**16 rev1y ago](https://www.amazon.com/dp/B0F8Q3K6X9) [**HIITIO 30 Amp NEMA L14-30R Power Outlet Box 125/250 Volt Heavy Duty Lockable Weatherproof Outdoor Electrical Panel Outdoor Receptacle for EV Generator Trailer Motorhome ETL Listed HDS2-011**HIITIO**$36.24**7 rev1y ago](https://www.amazon.com/dp/B0F66XQLPZ) [**30A NEMA L14-30R Flanged Outlet 250V Generator Plug Female Locking Intlet Wall Receptacle 4 Prong Socket with Cover Industrial Grade Replacement for Transfer Switches ETL Listed**HYDUUU**$17.83**3 rev1y ago](https://www.amazon.com/dp/B0FHKVXH6D)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Pre-Drilling 30 Amp Generator Inlet Box NEMA L14-30P Power Inlet Box**RVMATE**$29.05**4.8★**▲ 253%**](https://www.amazon.com/dp/B09V9Z4X9D) [**Yomiuwo 1 Pack NEMA L1430R Flush Mounting Locking Receptacle 30 Amp Twist Lock L1430 Outlet 3-Pole 4-Wire 125/250V L1430R Plug Compatible Industrial L14 30R Receptacle UL Listed E309821**Yomiuwo**$9.99**4.8★**▲ 192%**](https://www.amazon.com/dp/B0FN9KHQ4J) [**ENERLITES NEMA L14-30R Locking Connector for Generator Twist Lock Female Plug 30 Amp 125/250 Volt 3 Pole 4 Wire Grounding Industrial Grade Heavy Duty UL Listed 66492-BK Black**ENERLITES**$11.70**4.6★**▲ 167%**](https://www.amazon.com/dp/B0108NSK1E) [**Yomiuwo 5 Pack L14-30R Receptacle Outlet 30 Amp 125/250V L14-30R Twist Lock Socket/Outlet for Generator 3 Pole 4 Wire Grounding Industrial Grade Heavy Duty UL Listed Black**Yomiuwo**$29.67**4.3★**▲ 152%**](https://www.amazon.com/dp/B0F8Q3K6X9) [**30A NEMA L14-30R Flanged Outlet 250V Generator Plug Female Locking Intlet Wall Receptacle 4 Prong Socket with Cover Industrial Grade Replacement for Transfer Switches ETL Listed**HYDUUU**$17.83**4.6★**▲ 135%**](https://www.amazon.com/dp/B0FHKVXH6D)
**~~View all trending →~~**
## **What buyers say about l14-30r**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**22%
*“Exactly what I needed”*
**Quality-Overall**22%
*“Good quality”*
**Value For Money**12%
*“Good deal”*
**Socket/Port/Plug**9%
*“Plug seems well made & sturdy”*
**Assembly/Installation**6%
*“The box works as expected with a clean installation”*
**Strength**4%
*“The construction is robust and solid”*
**Durability**3%
*“durability and ease”*
**Connectivity-Overall**2%
*“Well, made easy to connect good price”*
**Efficiency**2%
*“Works great”*
**Ease Of Use**2%
*“Easy to use”*
### **What buyers complain about **
**Quality-Overall**20%
*“this is too cheaply made”*
**Mounting**12%
*“The terminal screw tightening mechanism is poor quality”*
**Durability**8%
*“Broke”*
**Design-Overall**6%
*“Really bad engineering”*
**Advertised Vs Actual Product**6%
*“They can falsely claim listing on here”*
**Instructions/User Manual/Troubleshooting**6%
*“manual transfer switches are cheap”*
**Compatibility-Overall**6%
*“Not compatible with Reliant manual transfer switch”*
**Assembly/Installation**4%
*“Not much space behind the plug inside the box for the 10AWG wire so a bit difficult to get it all together”*
**Size-Overall**4%
*“I used SO #8-4 rubber cord Cord would not fit into plug housing without removing material”*
**Certifications**3%
*“Even though it states UL I doubt it”*
### **Top return reasons **
**Size-Overall**28%
**Compatibility-Overall**16%
**Socket/Port/Plug**10%
**Functionality-Overall**7%
**Advertised Vs Actual Product**6%
**Connectivity-Overall**6%
**Value For Money**6%
**Defective Material/Parts**5%
**Quality-Overall**4%
**Assembly/Installation**2%
## **Common questions**
- **Is l14-30r profitable to sell on Amazon United States?**
- The niche generates $77K/yr across 30 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -46.3%. Flapen's verdict: Skip it (45/100).
- **How competitive is the l14-30r niche?**
- 21 brands and 66 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 69% of demand.
- **What do buyers complain about in l14-30r?**
- Top complaints mined from reviews: Quality-Overall, Mounting, Durability. The return rate is 2.6%.
- **When does demand for l14-30r peak?**
- Demand peaks in Jan–Oct–Nov; the busiest month runs 2.8× the quietest.
- **What does it cost to enter the l14-30r niche?**
- Listings span $6.89–$81.62; the average listing price is $25.98 (sweet spot $15–$100). The average incumbent carries 557 reviews — the moat a new listing must climb.
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