---
title: "Power Inlet Box — $126K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/power-inlet-box"
last_updated: "2026-08-07T21:09:23.028Z"
locale: en
meta:
description: "Niche score 42/100 · $126K/yr market · 86K searches/yr · $48.32 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 42/100 · $126K/yr market · 86K searches/yr · $48.32 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Power Inlet Box — $126K/yr Amazon US Niche (2026) - Flapen"
---
# **power inlet box**
**Skip it**
Soft demand (-62.0% this quarter) — this niche doesn't clear our bar today.
Market size 29Growth 0Conversion 38Competition 47Returns 66Price range 95Avg price 94Brand share 54Review moat 71Quality gap 16
**Price range**
**Incredible****$16.95–$92.03**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$48.32**
avg listing price — sweet spot $15–$100
**Review moat**
**Good****643.33**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Good****2.4%**
return rate — above 5% kills the launch gate
**Brand share**
**Good****73%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****57%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Okay****3.0%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Okay****$126K**
$126K/yr · 86K searches
**Quality gap**
**Bad****4.8★**
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 ~~](https://flapen.com/research/methodology)
## **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.
13K8KSpike '24Spike '25Prime Day '25Black Friday '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Oct · busiest ÷ quietest = 3.2×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/power-inlet-box/trend)
## **Top power inlet box search terms**
- **generator inlet box**27K/yr-65.4%2.6% conv. - **power inlet box**18K/yr-61.4%1.2% conv. - **generator inlet**11K/yr-66.7%3.4% conv. - **generator outlet**9K/yr-54.0%1.4% conv. - **generator power inlet box**10K/yr-63.0%1.4% conv. - **generator receptacle**5K/yr-47.8%1.0% conv. - **outdoor generator inlet boxes**5K/yr-57.9%0.3% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/power-inlet-box/search-terms)
## **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.
0%10%$13K20%$25K30%$38K40%$50K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 21 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**RVMATE Pre-Drilling 50 Amp Generator Inlet Box NEMA SS2-50P Inlet Box**RVMATE**$31.33**4.7★575 rev](https://www.amazon.com/dp/B09VBD946C) [2**Pre-Drilling 30 Amp Generator Inlet Box NEMA L14-30P Power Inlet Box**RVMATE**$29.05**4.8★427 rev](https://www.amazon.com/dp/B09V9Z4X9D) [3**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**$24.02**4.7★300 rev](https://www.amazon.com/dp/B09SF1MFT4) [4**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**$68.02**4.8★134 rev](https://www.amazon.com/dp/B0DLNXNYNF) [5**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**$90.45**4.8★577 rev](https://www.amazon.com/dp/B0BL2HX3P5)
**~~View all top sellers →~~**
### **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**$87.98**194 rev1y ago](https://www.amazon.com/dp/B0F2TJT2HF) [**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**$68.02**134 rev1y ago](https://www.amazon.com/dp/B0DLNXNYNF) [**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**$18.50**31 rev1y ago](https://www.amazon.com/dp/B0DG4QL6NK) [**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**$57.18**149 rev1y ago](https://www.amazon.com/dp/B0CR9ZGGGF) [**Marsflex 50 Amp Generator Power Inlet Box SS2-50P Weatherproof Outdoor**Marsflex**$24.20**91 rev2y ago](https://www.amazon.com/dp/B0CZ8NJTW9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$24.02**4.7★**▲ 141%**](https://www.amazon.com/dp/B09SF1MFT4) [**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**$90.45**4.8★**▲ 101%**](https://www.amazon.com/dp/B0BL2HX3P5) [**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**$16.95**5.0★**▲ 96%**](https://www.amazon.com/dp/B0C9DKX68D) [**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**$18.50**4.9★**▲ 93%**](https://www.amazon.com/dp/B0DG4QL6NK) [**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**$31.99**4.6★**▲ 44%**](https://www.amazon.com/dp/B08GLK5HJJ)
**~~View all trending →~~**
## **What buyers say about power inlet box**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**31%
*“Good Quality Box”*
**Assembly/Installation**17%
*“EASY TO INSTALL”*
**Advertised Vs Actual Product**14%
*“As advertised”*
**Value For Money**8%
*“Great price”*
**Size-Overall**4%
*“Nice fit”*
**Strength**3%
*“Seems very sturdy”*
**Connectivity-Overall**2%
*“The connection light at the box is an added benefit”*
**Weight Heavy**2%
*“Very nice heavy duty product”*
**Durability**2%
*“durability and ease”*
**Socket/Port/Plug**2%
*“Generator power cord”*
### **What buyers complain about **
**Mounting**12%
*“The box that mounts on the house is poor quality”*
**Rusts/Corrodes**11%
*“Box will rust”*
**Quality-Overall**11%
*“The reason for the one star review is purely quality control”*
**Assembly/Installation**10%
*“didn't work for my set up”*
**Size-Overall**7%
*“the box is small”*
**Socket/Port/Plug**5%
*“While the receptacle is well made youll note the plug pictured shows a hole”*
**Design-Overall**5%
*“The lugs are a terrible design”*
**Advertised Vs Actual Product**3%
*“They can falsely claim listing on here”*
**Metal Quality**3%
*“-2 more stars for not being steel as advertised”*
**Connectivity-Overall**3%
*“the terminal connections are a poor design”*
### **Top return reasons **
**Size-Overall**29%
**Value For Money**13%
**Defective Material/Parts**8%
**Advertised Vs Actual Product**6%
**Compatibility-Overall**6%
**Connectivity-Overall**5%
**Functionality-Overall**5%
**Socket/Port/Plug**5%
**Assembly/Installation**4%
**Quality-Overall**3%
## **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.
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