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

The niche generates $199K/yr across 23 tracked products. 90-day search growth is +74.3%. Flapen's verdict: Skip it (48/100).

How competitive is the shore power cord niche?

7 brands and 84 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 97% of demand.

What do buyers complain about in shore power cord?

Top complaints mined from reviews: Size-Overall, Assembly/Installation, Durability. The return rate is 2.9%.

When does demand for shore power cord peak?

Demand peaks in May–Jun–Jul–Aug; the busiest month runs 2.8× the quietest.

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

Listings span $18.59–$247.08; the average listing price is $70.49 (sweet spot $15–$100). The average incumbent carries 352 reviews — the moat a new listing must climb.

shore power cord

Skip it

Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.

Avg price

Great$70.49

avg listing price — sweet spot $15–$100

Review moat

Great351.87

avg incumbent reviews — the moat a new listing must climb

Growth

Great+74.3%

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

Conversion

Good4.7%

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

Returns

Good2.9%

return rate — above 5% kills the launch gate

Competition

Okay58%

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

Market size

Okay$199K

$199K/yr · 61K searches

Price range

Okay$18.59–$247.08

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Brand share

Bad97%

top-5 brand share — brand-locked demand

Signals High Price

According to Flapen's Amazon United States niche tracking, shore power cord is a $199K/yr Amazon United States market (61K searches/yr). The top 5 brands hold 97% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Skip it — 48/100.

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

shore power cord market data

Units sold / yr: 2K–3K; avg 0–100/product
Revenue / yr: $141K–$176K; units × avg price
Conversion rate: 4.7%
Avg BSR: #125
Page quality: 0%
Prime: 83%
Sponsored: 83%
Out of stock: 4.2%
Avg brand age: 56 months
Avg seller age: 162 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

7 falling

Sellers

Top-5 brand share

97%

Top 20: 100%

Top-5 click share

58%

Top 20: 96%

Open market

Marinco70%
Amp Up14%
Conntek8%
Fekuar4%
Kanayu2%
ONLINE LED STORE2%
Open — no brand owns it (1 brand, 1%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +74.3% search growth over the last 90 days.

Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 2.8×

Open Trend

Top shore power cord search terms

shore power cord16K/yr +92.8%2.1% conv.
marinco9K/yr +48.5%0.7% conv.
30 amp shore power cord8K/yr +76.9%2.0% conv.
marinco 30 amp 125v7K/yr +25.3%5.0% conv.
marine shore power cord5K/yr +134.2%2.3% conv.
marine power cord4K/yr +184.4%2.5% conv.
boat shore power cords5K/yr +57.8%1.9% conv.
shore power cord 30 amp3K/yr +135.0%2.8% conv.
30 amp marine shore power cord4K/yr -9.3%4.3% conv.

All search terms

Top shore power 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.

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

All 23 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Marinco 30A 125V Marine Shore Power Cordset Yellow 50 Ft 199119

Marinco$96.904.7★613 rev

Marinco 30A 125V Marine Shore Power Cordset Yellow 12 Ft 199116

Marinco$61.904.7★594 rev

Conntek 17105-025RE Marine Shore Power 30 Amp Cordset with Light Indicator (Yellow 25-Feet)

Conntek$62.514.6★880 rev

Marinco 30A 125V Marine Shore Power Cordset Yellow 25 Ft 199117

Marinco$103.354.7★594 rev

Marinco CS30-12 EEL Cordset 30A 125V 12 Yellow

Marinco$72.934.6★298 rev

Newest

by launch date

Kanayu 10FT 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$32.7152 rev

1y ago

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$20.08187 rev

2y ago

True Mods 15 ft 125V 30 Amp RV Shore Power Extension Cord [NEMA TT-30P L5-30R] [Screw-In Twist Lock] [LED Light] [ETL] 30A 10 AWG 3 Prong Copper Wire Locking Electrical Cable for Travel Trailer Camper

ONLINE LED STORE$41.11142 rev

3y ago

Amp Up 125v 30 Amp Shore Power Cord 25ft Heavy Duty Marine Boat and RV NEMA L5-30 Power Cord with Twist Lock Watertight Molded Ends and UL Listed from a US Based Company (RV MUST have Twist Lock)

Amp Up$66.76419 rev

5y ago

25ft 30Amp 125V RV Power Wire Cord Marine Shore Boat L5-30 Yellow 25 Feet Heavy Duty Electrical Power Cable NEMA L5-30P to NEMA L5-30R

Fekuar$67.9079 rev

5y ago

What buyers say about shore power cord

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

What buyers love

Quality-Overall33%

“Very well made”

Advertised Vs Actual Product12%

“Works as promised”

Value For Money9%

“Great Value”

Ease Of Use6%

“Easy to use”

Brightness/Shine/Glow5%

“Love the light power indicator”

Connectivity-Overall5%

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

Weight Heavy5%

“Heavy duty”

Add-Ons/Attachments5%

“Easy attachment”

Efficiency5%

“worked fine”

Friction2%

“Terminals on plugs have a very good clamping system for the wires”

What buyers complain about

Size-Overall21%

“Does not fit well like my other cords”

Assembly/Installation19%

“installer beware”

Durability14%

“Stopped working 2 months later”

Weight Heavy7%

“But it is a little bulky”

Connectivity-Overall7%

“However, this 30A shore power connection is terrible”

Value For Money7%

“Throwing this overly expensive piece of trash”

Water Resistance5%

“The Gasket to waterproof the outside plug doesn't really work for cords 6 awg or larger”

Quality-Overall5%

“Overall, this product is of pretty poor quality despite its bulk and weight”

Top return reasons

Size-Overall34%

Compatibility-Overall22%

Advertised Vs Actual Product9%

Connectivity-Overall7%

Functionality-Overall5%

Defective Material/Parts5%

Value For Money3%

Add-Ons/Attachments2%

Color2%

Mounting1%

Common questions

Is shore power cord profitable to sell on Amazon United States?: The niche generates $199K/yr across 23 tracked products. 90-day search growth is +74.3%. Flapen's verdict: Skip it (48/100).
How competitive is the shore power cord niche?: 7 brands and 84 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 97% of demand.
What do buyers complain about in shore power cord?: Top complaints mined from reviews: Size-Overall, Assembly/Installation, Durability. The return rate is 2.9%.
When does demand for shore power cord peak?: Demand peaks in May–Jun–Jul–Aug; the busiest month runs 2.8× the quietest.
What does it cost to enter the shore power cord niche?: Listings span $18.59–$247.08; the average listing price is $70.49 (sweet spot $15–$100). The average incumbent carries 352 reviews — the moat a new listing must climb.