Is l14-30p profitable to sell on Amazon United States?

The niche generates $91K/yr across 13 tracked products. 90-day search growth is -55.6%. Flapen's verdict: Skip it (38/100).

How competitive is the l14-30p niche?

11 brands and 34 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 82% of demand.

What do buyers complain about in l14-30p?

Top complaints mined from reviews: Quality-Overall, Size-Overall, Design-Overall. The return rate is 2.3%.

When does demand for l14-30p peak?

Demand peaks in Jan–Oct; the busiest month runs 3.2× the quietest.

What does it cost to enter the l14-30p niche?

Listings span $6.21–$48.21; the average listing price is $15.50 (sweet spot $15–$100). The average incumbent carries 788 reviews — the moat a new listing must climb.

l14-30p

Skip it

Soft demand (-55.6% this quarter) — this niche doesn't clear our bar today.

Price range

Great$6.21–$48.21

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Great7.2%

search→purchase rate — share of searches ending in a sale

Avg price

Great$15.50

avg listing price — sweet spot $15–$100

Review moat

Good787.54

avg incumbent reviews — the moat a new listing must climb

Returns

Good2.3%

return rate — above 5% kills the launch gate

Brand share

Okay82%

top-5 brand share — brands hold most of the demand

Market size

Bad$91K

$91K/yr · 82K searches

Competition

Bad75%

top-5 click share — a locked-up shelf

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Growth

Bad-55.6%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United States niche tracking, l14-30p is a $91K/yr Amazon United States market (82K searches/yr). The top 5 brands hold 82% of demand. Demand peaks in Jan–Oct. Verdict: Skip it — 38/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

l14-30p market data

Units sold / yr: 6K–8K; avg 250–500/product
Revenue / yr: $93K–$124K; units × avg price
Conversion rate: 7.2%
Avg BSR: #138
Page quality: 0%
Prime: 100%
Sponsored: 85%
Out of stock: 0.4%
Avg brand age: 58 months
Avg seller age: 173 days

Competition & brand share

The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

Top-5 brand share

82%

Top 20: 100%

Top-5 click share

75%

Top 20: 100%

Open market

14%

ELEGRP43%
ENERLITES15%
Leviton13%
MECMO6%
Nilight5%
AIDA5%
Open — no brand owns it (5 brands, 14%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -55.6% search growth over the last 90 days.

Peak months: Jan, Oct · busiest ÷ quietest = 3.2×

Open Trend

Top l14-30p search terms

l14-30p28K/yr -57.5%6.2% conv.
l14-3013K/yr -48.2%2.8% conv.
nema l14-30p10K/yr -45.4%4.1% conv.
nema l14-307K/yr -49.5%3.8% conv.
4 prong generator plug6K/yr -56.5%1.4% conv.
l14-30 plug6K/yr -65.9%5.5% conv.
4 prong 30 amp plug4K/yr -58.8%1.1% conv.
4 prong twist lock generator plug4K/yr -68.8%1.4% conv.
l14-30r plug3K/yr -60.8%4.3% conv.

All search terms

Top l14-30p 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

ELEGRP NEMA L14-30P Locking Plug Generator Twist Lock Adapter Male Plug 30 Amp 125/250V 3 Pole 4 Wire Grounding Industrial Grade Heavy Duty UL Listed (1 Pack Black/White)

ELEGRP$9.774.7★1,483 rev

ENERLITES NEMA L14-30P Locking Plug Connector for Generator Twist Lock Male Plug 30 Amp 125/250 Volt 3 Pole 4 Wire Grounding Industrial Grade Heavy Duty UL Listed 66470-BK Black

ENERLITES$9.684.7★2,284 rev

Leviton 30 Amp 125/250 Volt NEMA L14-30P 3P 4W Locking Plug Industrial Grade Grounding 2711 Black-White

Leviton$16.304.8★1,908 rev

MECMO 30Amp L14-30P Generator Locking Plug UL Listed Twist Lock 30 Amp 4 Prong Generator Male Plug Connector 125/250 Volt 3 Pole 4 Wire Grounding Industrial-Strength Heavy Duty

MECMO$11.714.7★28 rev

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$14.814.6★860 rev

Newest

by launch date

MECMO 30Amp L14-30P Generator Locking Plug UL Listed Twist Lock 30 Amp 4 Prong Generator Male Plug Connector 125/250 Volt 3 Pole 4 Wire Grounding Industrial-Strength Heavy Duty

MECMO$11.7128 rev

1y ago

HIITIO NEMA L14-30P Locking Plug AC150V Locking Plug Connector for Generator Grounding Electrical Replacement Industrial Grade UL Listed L14-30P

HIITIO$6.218 rev

1y ago

AIDA NEMA L14-30P & NEMA L14-30R Locking Plug and Connector Twist Generator Male and Female Adapter 30 Amp 125/250 Volt 3-Pole 4-Wire Grounding Industrial-Strength Heavy Duty UL Listed

AIDA$19.5275 rev

2y ago

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$14.81860 rev

2y ago

PlugSaf 25FT 30 Amp Generator Extension Cord 4 Prong NEMA L14-30P/L14-30R 10 Gauge STW 125/250V Twist Lock Generator Cord Heavy Duty Black ETL Listed

PlugSaf$48.21583 rev

3y ago

What buyers say about l14-30p

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall26%

“Good quality product”

Advertised Vs Actual Product21%

“Just what I needed”

Value For Money11%

“great product and reasonable price”

Socket/Port/Plug10%

“Well made connector”

Assembly/Installation7%

“The box works as expected with a clean installation”

Efficiency3%

“Works great”

Size-Overall3%

“all fit great”

Connectivity-Overall3%

“Well, made easy to connect good price”

Durability3%

“Easy to use and durable”

Strength3%

“The construction feels solid”

What buyers complain about

Quality-Overall21%

“this is too cheaply made”

Size-Overall10%

“I used SO #8-4 rubber cord Cord would not fit into plug housing without removing material”

Design-Overall8%

“Really bad engineering”

Durability8%

“Broke”

Compatibility-Overall8%

“Not compatible with Reliant manual transfer switch”

Mounting8%

“Box decent, missing screws”

Advertised Vs Actual Product8%

“They can falsely claim listing on here”

Certifications4%

“Even though it states UL I doubt it”

Water Resistance3%

“Not water proof”

Assembly/Installation2%

“removed temporary screws”

Top return reasons

Size-Overall29%

Compatibility-Overall21%

Socket/Port/Plug11%

Value For Money7%

Defective Material/Parts5%

Quality-Overall5%

Functionality-Overall5%

Advertised Vs Actual Product4%

Connectivity-Overall4%