Is shore power adapter profitable to sell on Amazon United States?

The niche generates $21K/yr across 19 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +103.3%. Flapen's verdict: Worth a look (52/100).

How competitive is the shore power adapter niche?

9 brands and 61 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 84% of demand.

What do buyers complain about in shore power adapter?

Top complaints mined from reviews: Size-Overall, Amplification. The return rate is 4.2%.

When does demand for shore power adapter peak?

Demand peaks in May–Jun–Jul–Aug; the busiest month runs 2.5× the quietest.

What does it cost to enter the shore power adapter niche?

Listings span $9.63–$42.97; the average listing price is $21.58 (sweet spot $15–$100). The average incumbent carries 263 reviews — the moat a new listing must climb.

shore power adapter

Worth a look

Shows demand growing +103.3% this quarter, but a small market ($21K/yr) keeps it on the watch list.

Growth

Great+103.3%

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

Avg price

Great$21.58

avg listing price — sweet spot $15–$100

Review moat

Great262.95

avg incumbent reviews — the moat a new listing must climb

Price range

Great$9.63–$42.97

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

Conversion

Great8.4%

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

Competition

Okay57%

top-5 click share — leaders hold, buyers still browse

Brand share

Okay84%

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

Returns

Okay4.2%

return rate — above 5% kills the launch gate

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Market size

Bad$21K

$21K/yr · 12K searches

Signals Trending

According to Flapen's Amazon United States niche tracking, shore power adapter is a $21K/yr Amazon United States market (12K searches/yr). The top 5 brands hold 84% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Worth a look — 52/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

shore power adapter market data

Units sold / yr: 750–1K; avg 0–100/product
Revenue / yr: $16K–$22K; units × avg price
Conversion rate: 8.4%
Avg BSR: #36
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 42 months
Avg seller age: 192 days

Competition & brand share

The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.

Brands

9 falling

Sellers

Top-5 brand share

84%

Top 20: 100%

Top-5 click share

57%

Top 20: 100%

Open market

11%

ADCAUDX47%
Marinco12%
MECMO9%
CORDMITPRO8%
HOZHEM7%
Kohree5%
Open — no brand owns it (3 brands, 11%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +103.3% search growth over the last 90 days.

Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 2.5×

Open Trend

Top shore power adapter 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 19 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

1FT 30-Amp to 15-Amp Marine & RV-Adapter Cord Nema 5-15P to L5-30R 10AWG 15Amp Male to 30Amp-Female Twist Lock Power Adapter Marine Shore Power 30A 125V Receptacle to 110V 15A Household Plug

ADCAUDX$20.084.8★187 rev

1FT 30-Amp to 15-Amp Marine-Shore Power-Adapter NEMA L5-30P to 5-15/20R 10AWG 30Amp to 20Amp T Blade Marine Adapter Plug Twist Lock 125V 30A to 20A/ 15A Household Outlet Pigtail Boat

ADCAUDX$20.254.8★71 rev

30 Amp Shore Power Adapter - NEMA L5-30P to 5-15R/5-20R Twist Lock Plug RV & Marine Generator Connector 110V/120V Household Outlet Converter with 3-Prong Locking Safe and Reliable Power Supply

HOZHEM$14.164.6★68 rev

Marinco S30-15 Straight Adapter 30A 125V Male To 15A 125V Female Yellow

Marinco$42.974.8★416 rev

MECMO Shore Power NEMA L5-30P to 5-15/20R RV Generator Adapter Marine 30 Amp to 110 15 Amp Household Regular Connector 30A 125V 3 Prong Twist Lock Locking Male L5-30 to 5-15R 5-20R Female Cord

MECMO$22.194.7★180 rev

Newest

by launch date

1.5FT Overload Protection 15 Amp to 30 Amp Marine Shore Power Adapter with Circuit Breaker Nema 5-15P to L5-30R Twist Lock Boat Shore Power Cord for Yacht 30A Receptacle to 110V 15A Household Plug

CORDMITPRO$20.2712 rev

10mo ago

3FT 30-Amp to 15-Amp 110V Marine & RV Adapter Cord Nema 5-15P to L5-30R 10AWG 15Amp Male to 30Amp-Female Twist Lock Marine Shore Power Adapter 125V 30A to 15A Household Plug Pigtail for Boat RV

ADCAUDX$26.10187 rev

1y ago

CORDMITPRO Overload Protector 30 Amp to 110 Adapter Generator Power Cord Shore Power 30 Amp to 15 Amp/20 Amp Adapter Marine NEMA L5-30P to 3X 5-15R/5-20R RV Generator Adapter 1.5FT

CORDMITPRO$22.5138 rev

1y ago

Kanayu 3FT 30 Amp to 15 Amp Marine Shore Power Adapter Extension Power Cord Nema L5-30P to 5-15/20R 10AWG 30Amp to 20Amp T Blade Marine Plug 125V Household Outlet Pigtail Boat Adapter

Kanayu$23.3952 rev

1y ago

MECMO RV 50 Amp to 110 Adapter with Locking Connector NEMA 5-15P to SS2-50R Household 15A 110V Male to 50A Female Twist Lock Shore Power Adapter Plug w/ Threaded Ring for RV Camper Boat Marine

MECMO$16.1150 rev

1y ago

What buyers say about shore power adapter

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

What buyers love

Advertised Vs Actual Product22%

“As advertised”

Quality-Overall18%

“Nice quality power adapter”

Durability7%

“The performance has been excellent so far — reliable, efficient, and consistent in everyday use”

Value For Money7%

“Great price for a well made adapter”

Ease Of Use6%

“Easy to use”

Size-Overall6%

“Fits well”

Design-Overall5%

“I am pleased with the construction”

Socket/Port/Plug5%

“Great adapter”

Add-Ons/Attachments4%

“Easy attachment”

Connectivity-Overall4%

“Easy way to connect your RV/Camper to the house”

What buyers complain about

Size-Overall61%

“Sent back did not fit”

Amplification11%

“had no place for a 30 amp charge”

Top return reasons

Size-Overall46%

Compatibility-Overall16%

Advertised Vs Actual Product8%

Connectivity-Overall8%

Shape/Style4%

Functionality-Overall4%

Socket/Port/Plug4%

Amplification3%

Defective Material/Parts2%

Add-Ons/Attachments2%

Common questions

Is shore power adapter profitable to sell on Amazon United States?: The niche generates $21K/yr across 19 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +103.3%. Flapen's verdict: Worth a look (52/100).
How competitive is the shore power adapter niche?: 9 brands and 61 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 84% of demand.
What do buyers complain about in shore power adapter?: Top complaints mined from reviews: Size-Overall, Amplification. The return rate is 4.2%.
When does demand for shore power adapter peak?: Demand peaks in May–Jun–Jul–Aug; the busiest month runs 2.5× the quietest.
What does it cost to enter the shore power adapter niche?: Listings span $9.63–$42.97; the average listing price is $21.58 (sweet spot $15–$100). The average incumbent carries 263 reviews — the moat a new listing must climb.

shore power adapter

shore power adapter market data

Competition & brand share

Demand & seasonality

Top shore power adapter products on Amazon

Top sellers

Newest

Trending

What buyers say about shore power adapter

What buyers love

What buyers complain about

Top return reasons

Common questions

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