50 amp generator inlet box
Worth a lookShows a sweet-spot price point ($62.41 avg), but soft demand (-63.0% this quarter) keeps it on the watch list.
Avg price
Great$62.41avg listing price — sweet spot $15–$100
Market size
Great$1.2M$1.2M/yr · 335K searches
Price range
Great$24.20–$124.25cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good61%top-5 brand share — brands hold most of the demand
Review moat
Good609.53avg incumbent reviews — the moat a new listing must climb
Conversion
Good5.8%search→purchase rate — share of searches ending in a sale
Returns
Good2.8%return rate — above 5% kills the launch gate
Competition
Okay61%top-5 click share — leaders hold, buyers still browse
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Growth
Bad-63.0%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, 50 amp generator inlet box is a $1.2M/yr Amazon United States market (335K searches/yr). The top 5 brands hold 61% of demand. Demand peaks in Jan–Feb–Jul–Aug–Oct. Verdict: Worth a look — 51/100.
Data updated Jul 23, 2026 · scored weekly · How we score niches
50 amp generator inlet box market data
- Units sold / yr
- 15K–20K
- avg 1,000–1,250/product
- Revenue / yr
- $936K–$1.2M
- units × avg price
- Conversion rate
- 5.8%
- Avg BSR
- #25
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 0.0%
- Avg brand age
- 49 months
- Avg seller age
- 164 days
Competition & brand share
The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.Brands
16 flat
Sellers
42
Top-5 brand share
61%
Top 20: 100%
Top-5 click share
61%
Top 20: 100%
Open market
31%
- RVMATE30%
- RVINGPRO8%
- CircleRiver8%
- Reliance Controls8%
- SURAIELEC8%
- LANDNOR7%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -63.0% search growth over the last 90 days.Peak months: Jan, Feb, Jul, Aug, Oct · busiest ÷ quietest = 2.7×
Top 50 amp generator inlet box search terms
- 50 amp generator inlet box145K/yr
- 50amp generator inlet box31K/yr
- 50 amp generator plug23K/yr
- 50 amp inlet box15K/yr
- 50 amp generator cord and power inlet box16K/yr
- generator plug for house 50 amp15K/yr
- 50 amp power inlet box13K/yr
- generator inlet box 50 amp kit12K/yr
- ss2-50p9K/yr
- 50a generator inlet box8K/yr
Top 50 amp generator 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 17 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
RVINGPRO 50 AMP Generator Inlet Box and 15Ft Generator Cord Kit
RVINGPRO$92.034.8★805 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
Reliance Controls PB50 50-Amp (CS6375) NEMA 3R Power Inlet Box Gray
Reliance Controls$75.184.7★1,824 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
Newest
by launch date
Joinfworld 50 Amp Generator Inlet Box NEMA SS2-50P 125/250V 12500W Weatherproof Outdoor Receptacle Emergency-Ready Industrial Grade
Joinfworld$63.4433 rev
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
Ficstar 25FT 50 Amp Generator Cord and Power Inlet Box Kit NEMA 14-50P to SS2-50R Generator Extension Cord Pre-Drilled 50 Amp Generator Inlet Box with STW Wire 125/250V 12500W;UL&ETL Listed
Ficstar$124.25194 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
VEVOR 50 Amp Generator Cord and Power Inlet Box Kit 25FT Generator Extension Cord NEMA 14-50P/SS2-50R STW 6/3+8/1 AWG with Twist Lock Connector Pre-Drilled Inlet Box ETL Listed
VEVOR$122.68566 rev
Trending
90-day click momentumFicstar 25FT 50 Amp Generator Cord and Power Inlet Box Kit NEMA 14-50P to SS2-50R Generator Extension Cord Pre-Drilled 50 Amp Generator Inlet Box with STW Wire 125/250V 12500W;UL&ETL Listed
Ficstar$124.254.8★
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★
50 Amp Generator Inlet Box - NEMA SS2-50P Power Waterproof Outlet - RV Outdoor/Indoor Weatherproof Use - 125/250V Up to 12500 Watts 3R Plug ETL Listed
AA Ignition$28.264.6★
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$87.984.8★
Marsflex 50 Amp Generator Power Inlet Box SS2-50P Weatherproof Outdoor
Marsflex$24.204.8★
What buyers say about 50 amp generator inlet box
What buyers praise and complain about, mined from review topics.What buyers love
“Good Quality Box”
“Installed professionally”
“As advertised”
“Great price”
“everything connects easily”
“Very sturdy and quality made”
“Nice fit”
“HEAVY DUTY”
“Generator power cord”
“Great design”
What buyers complain about
“Box will rust”
“didn't work for my set up”
“The reason for the one star review is purely quality control”
“The box that mounts on the house is poor quality”
“While the receptacle is well made youll note the plug pictured shows a hole”
“The lugs are a terrible design”
“-2 more stars for not being steel as advertised”
“the box is small”
“the terminal connections are a poor design”
“much heavier than I expected”
Top return reasons
Common questions
- Is 50 amp generator inlet box profitable to sell on Amazon United States?
- The niche generates $1.2M/yr across 17 tracked products. 90-day search growth is -63.0%. Flapen's verdict: Worth a look (51/100).
- How competitive is the 50 amp generator inlet box niche?
- 16 brands and 42 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 61% of demand.
- What do buyers complain about in 50 amp generator inlet box?
- Top complaints mined from reviews: Rusts/Corrodes, Assembly/Installation, Quality-Overall. The return rate is 2.8%.
- When does demand for 50 amp generator inlet box peak?
- Demand peaks in Jan–Feb–Jul–Aug–Oct; the busiest month runs 2.7× the quietest.
- What does it cost to enter the 50 amp generator inlet box niche?
- Listings span $24.20–$124.25; the average listing price is $62.41 (sweet spot $15–$100). The average incumbent carries 610 reviews — the moat a new listing must climb.