power inlet box
Skip itSoft demand (-62.0% this quarter) — this niche doesn't clear our bar today.
Price range
Incredible$16.95–$92.03cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$48.32avg listing price — sweet spot $15–$100
Review moat
Good643.33avg incumbent reviews — the moat a new listing must climb
Returns
Good2.4%return rate — above 5% kills the launch gate
Brand share
Good73%top-5 brand share — brands hold most of the demand
Competition
Okay57%top-5 click share — leaders hold, buyers still browse
Conversion
Okay3.0%search→purchase rate — share of searches ending in a sale
Market size
Okay$126K$126K/yr · 86K searches
Quality gap
Bad4.8★avg incumbent rating — lower means beatable quality
Growth
Bad-62.0%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, power inlet box is a $126K/yr Amazon United States market (86K searches/yr). The top 5 brands hold 73% of demand. Demand peaks in Jan–Feb–Oct. Verdict: Skip it — 42/100.
Data updated Jul 23, 2026 · scored weekly · How we score niches
power inlet box market data
- Units sold / yr
- 3K–3K
- avg 0–100/product
- Revenue / yr
- $121K–$145K
- units × avg price
- Conversion rate
- 3.0%
- Avg BSR
- #15
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 90%
- Out of stock
- 1.4%
- Avg brand age
- 40 months
- Avg seller age
- 196 days
Competition & brand share
The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.Brands
16 falling
Sellers
52
Top-5 brand share
73%
Top 20: 100%
Top-5 click share
57%
Top 20: 99%
Open market
23%
- RVMATE37%
- CircleCord14%
- RVINGPRO9%
- SURAIELEC9%
- CircleRiver4%
- Reliance Controls4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -62.0% search growth over the last 90 days.Peak months: Jan, Feb, Oct · busiest ÷ quietest = 3.2×
Top power inlet box search terms
- generator inlet box27K/yr
- power inlet box18K/yr
- generator inlet11K/yr
- generator outlet9K/yr
- generator power inlet box10K/yr
- generator receptacle5K/yr
- outdoor generator inlet boxes5K/yr
Top power inlet box 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.
All 21 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
RVMATE Pre-Drilling 50 Amp Generator Inlet Box NEMA SS2-50P Inlet Box
RVMATE$31.334.7★575 rev
Pre-Drilling 30 Amp Generator Inlet Box NEMA L14-30P Power Inlet Box
RVMATE$29.054.8★427 rev
CircleCord 30 Amp 4 Prong Generator Power Inlet Box NEMA L14-30P Power Inlet Box for 4 Prong Generator Cord 125/250 Volt 7500 Watts Weatherproof Outdoor Use for Emergency Ready ETL Listed
CircleCord$24.024.7★300 rev
SURAIELEC 50 Amp Generator Power Inlet Box NEMA SS2-50P Generator Box for 3-Prong Generator Cord 120/240V 12000W Weatherproof Outdoor Outlet Receptacle
SURAIELEC$68.024.8★134 rev
CircleRiver 50 Amp 15Feet Generator Cord and Power Inlet Box Combo Kit NEMA 14-50P Male to SS2-50R STW 6/3+8/1 AWG 125/250V Twist Locking with Inlet Box for Generator to House
CircleRiver$90.454.8★577 rev
Newest
by launch date
Ficstar 15FT 50 Amp Generator Cord and Power Inlet Box Kit NEMA 14-50P to SS2-50R Generator Cord Pre-Drilled 50 Amp Generator Inlet Box with 6/3+8/1 AWG STW Wire 125/250V 12500W UL&ETL Listed
Ficstar$87.98194 rev
SURAIELEC 50 Amp Generator Power Inlet Box NEMA SS2-50P Generator Box for 3-Prong Generator Cord 120/240V 12000W Weatherproof Outdoor Outlet Receptacle
SURAIELEC$68.02134 rev
Islewire 30 Amp Generator Power Inlet Box Pre-drilled NEMA L14-30P Box for 4-Prong Generator Cord 125/250V 7500W Weatherproof NEMA 3R for Outdoor Use LED Indicator Emergency Ready ETL Listed
islewire$18.5031 rev
SURAIELEC 30 Amp Generator Power Inlet Box NEMA L14-30P Generator Box for Generator Cord 120/240V Weatherproof Outdoor Outlet Receptacle Outlet ETL Listed Ready for Emergency Use
SURAIELEC$57.18149 rev
Marsflex 50 Amp Generator Power Inlet Box SS2-50P Weatherproof Outdoor
Marsflex$24.2091 rev
Trending
90-day click momentumCircleCord 30 Amp 4 Prong Generator Power Inlet Box NEMA L14-30P Power Inlet Box for 4 Prong Generator Cord 125/250 Volt 7500 Watts Weatherproof Outdoor Use for Emergency Ready ETL Listed
CircleCord$24.024.7★
CircleRiver 50 Amp 15Feet Generator Cord and Power Inlet Box Combo Kit NEMA 14-50P Male to SS2-50R STW 6/3+8/1 AWG 125/250V Twist Locking with Inlet Box for Generator to House
CircleRiver$90.454.8★
OPL5 30AMP Generator Power Inlet Box with Pre Punched Knockouts NEMA L14-30P for 4 Prong Generator with LED Indicator Light 125/250 Volt 7500 Watts for Outdoor Use ETL Listed (L14-30P)
OPL5$16.955.0★
Islewire 30 Amp Generator Power Inlet Box Pre-drilled NEMA L14-30P Box for 4-Prong Generator Cord 125/250V 7500W Weatherproof NEMA 3R for Outdoor Use LED Indicator Emergency Ready ETL Listed
islewire$18.504.9★
WELLUCK 50 Amp Generator Inlet Box - NEMA SS2-50P Power Inlet Box for 3R 3-Prong Generator Cord 125/250V 12500W Weatherproof Outdoor 50a Power Inlet Box - ETL Listed Best Partner in Emergencies
WELLUCK$31.994.6★
What buyers say about power inlet box
What buyers praise and complain about, mined from review topics.What buyers love
“Good Quality Box”
“EASY TO INSTALL”
“As advertised”
“Great price”
“Nice fit”
“Seems very sturdy”
“The connection light at the box is an added benefit”
“Very nice heavy duty product”
“durability and ease”
“Generator power cord”
What buyers complain about
“The box that mounts on the house is poor quality”
“Box will rust”
“The reason for the one star review is purely quality control”
“didn't work for my set up”
“the box is small”
“While the receptacle is well made youll note the plug pictured shows a hole”
“The lugs are a terrible design”
“They can falsely claim listing on here”
“-2 more stars for not being steel as advertised”
“the terminal connections are a poor design”
Top return reasons
Common questions
- Is power inlet box profitable to sell on Amazon United States?
- The niche generates $126K/yr across 21 tracked products. 90-day search growth is -62.0%. Flapen's verdict: Skip it (42/100).
- How competitive is the power inlet box niche?
- 16 brands and 52 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 73% of demand.
- What do buyers complain about in power inlet box?
- Top complaints mined from reviews: Mounting, Rusts/Corrodes, Quality-Overall. The return rate is 2.4%.
- When does demand for power inlet box peak?
- Demand peaks in Jan–Feb–Oct; the busiest month runs 3.2× the quietest.
- What does it cost to enter the power inlet box niche?
- Listings span $16.95–$92.03; the average listing price is $48.32 (sweet spot $15–$100). The average incumbent carries 643 reviews — the moat a new listing must climb.