---
title: "Shore Power Adapter — $21K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/sports-outdoors/shore-power-adapter"
last_updated: "2026-08-11T21:54:23.310Z"
locale: en
meta:
description: "Niche score 52/100 · $21K/yr market · 12K searches/yr · $21.58 avg price. A small market ($21K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · $21K/yr market · 12K searches/yr · $21.58 avg price. A small market ($21K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Shore Power Adapter — $21K/yr Amazon US Niche (2026) - Flapen"
---
# **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.
Market size 5Growth 92Conversion 80Competition 47Returns 35Price range 82Avg price 91Brand share 35Review moat 87Quality gap 22
**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**
**Great****262.95**
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**
**Great****8.4%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Okay****57%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Okay****84%**
top-5 brand share — brands hold most of the demand
**Returns**
**Okay****4.2%**
return rate — above 5% kills the launch gate
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$21K**
$21K/yr · 12K searches
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)")
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 ~~](https://flapen.com/research/methodology)
## **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**
**61**
**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.
400300Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 2.5×
[**Open Trend **](https://flapen.com/research/us/sports-outdoors/shore-power-adapter/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.
0%10%$2K20%$4K30%$6K40%$8K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**$20.08**4.8★187 rev](https://www.amazon.com/dp/B0CZ787MD8) [2**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**$20.25**4.8★71 rev](https://www.amazon.com/dp/B0CZ7FJH4L) [3**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**$14.16**4.6★68 rev](https://www.amazon.com/dp/B0DNQHKKC8) [4**Marinco S30-15 Straight Adapter 30A 125V Male To 15A 125V Female Yellow**Marinco**$42.97**4.8★416 rev](https://www.amazon.com/dp/B009IJLKBW) [5**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**$22.19**4.7★180 rev](https://www.amazon.com/dp/B0CPDJ1LW8)
**~~View all top sellers →~~**
### **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**$20.27**12 rev10mo ago](https://www.amazon.com/dp/B0FQNPRTWB) [**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**$26.10**187 rev1y ago](https://www.amazon.com/dp/B0FJ1WTFQS) [**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**$22.51**38 rev1y ago](https://www.amazon.com/dp/B0DWXCH2R2) [**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**$23.39**52 rev1y ago](https://www.amazon.com/dp/B0DTK44CZJ) [**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**$16.11**50 rev1y ago](https://www.amazon.com/dp/B0DQZRBZKC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**1FT 30 Amp to 20 Amp Shore-Power Adapter Marine-30Amp to 15Amp Adapter NEMA L5-30P to 5-15/20R L5-30P to 6-15/20R 20Amp T Blade 3 Prong Twist Lock 125V 30A to 20A/ 15A Pigtail RV Boat**ADCAUDX**$18.68**4.6★**▲ 104%**](https://www.amazon.com/dp/B0DFCR24WG) [**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**$16.11**4.8★**▲ 99%**](https://www.amazon.com/dp/B0DQZRBZKC) [**Marinco Marine Shore Power Straight Adapter 15 Amp 125 Volt Male to 30 Amp 125 Volt Female S15-30**Marinco**$40.84**4.4★**▲ 93%**](https://www.amazon.com/dp/B009IJL7JW) [**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**$20.27**4.0★**▲ 83%**](https://www.amazon.com/dp/B0FQNPRTWB) [**Shore Power NEMA L5-30P to 5-15/20R RV Generator Adapter Marine 30 Amp to 110 15 Amp Household Regular Inlet Connector 30A 3 Prong Locking Generator Male Plug L5-30P to 5-15R 5-20R Female Cord**Potiarey**$9.63**4.8★**▲ 56%**](https://www.amazon.com/dp/B0D93TNGHK)
**~~View all trending →~~**
## **What buyers say about shore power adapter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**22%
*“As advertised”*
**Quality-Overall**18%
*“Nice quality power adapter”*
**Durability**7%
*“The performance has been excellent so far — reliable, efficient, and consistent in everyday use”*
**Value For Money**7%
*“Great price for a well made adapter”*
**Ease Of Use**6%
*“Easy to use”*
**Size-Overall**6%
*“Fits well”*
**Design-Overall**5%
*“I am pleased with the construction”*
**Socket/Port/Plug**5%
*“Great adapter”*
**Add-Ons/Attachments**4%
*“Easy attachment”*
**Connectivity-Overall**4%
*“Easy way to connect your RV/Camper to the house”*
### **What buyers complain about **
**Size-Overall**61%
*“Sent back did not fit”*
**Amplification**11%
*“had no place for a 30 amp charge”*
### **Top return reasons **
**Size-Overall**46%
**Compatibility-Overall**16%
**Advertised Vs Actual Product**8%
**Connectivity-Overall**8%
**Shape/Style**4%
**Functionality-Overall**4%
**Socket/Port/Plug**4%
**Amplification**3%
**Defective Material/Parts**2%
**Add-Ons/Attachments**2%
## **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.
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