l5-30r extension cord
Skip itSoft demand (-59.1% this quarter) — this niche doesn't clear our bar today.
Price range
Incredible$21.69–$75.12cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$46.93avg listing price — sweet spot $15–$100
Review moat
Great379.93avg incumbent reviews — the moat a new listing must climb
Competition
Good48%top-5 click share — leaders hold, buyers still browse
Conversion
Okay3.8%search→purchase rate — share of searches ending in a sale
Brand share
Okay76%top-5 brand share — brands hold most of the demand
Returns
Okay4.3%return rate — above 5% kills the launch gate
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$41K$41K/yr · 23K searches
Growth
Bad-59.1%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, l5-30r extension cord is a $41K/yr Amazon United States market (23K searches/yr). The top 5 brands hold 76% of demand. Demand peaks in Jan–Oct. Verdict: Skip it — 39/100.
Data updated Jul 23, 2026 · scored weekly · How we score niches
l5-30r extension cord market data
- Units sold / yr
- 750–1K
- avg 0–100/product
- Revenue / yr
- $35K–$47K
- units × avg price
- Conversion rate
- 3.8%
- Avg BSR
- #389
- Page quality
- 0%
- Prime
- 97%
- Sponsored
- 77%
- Out of stock
- 14.1%
- Avg brand age
- 52 months
- Avg seller age
- 195 days
Competition & brand share
The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.Brands
18 falling
Sellers
39
Top-5 brand share
76%
Top 20: 100%
Top-5 click share
48%
Top 20: 92%
Open market
20%
- huanchain25%
- RVMATE21%
- Vockjour11%
- Champion Power Equipment10%
- EP9%
- oviitech4%
Demand & seasonality
Weekly Amazon search volume, last 103 weeks — -59.1% search growth over the last 90 days.Peak months: Jan, Oct · busiest ÷ quietest = 3.4×
Top l5-30r extension cord search terms
- l5-30 extension cord4K/yr
- l5-30r extension cord5K/yr
- 30 amp generator cord 3 prong4K/yr
- 3 prong generator cord4K/yr
- l5-30 generator cord4K/yr
- generator cord 30 amp 3 prong2K/yr
Top l5-30r extension 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
huanchain 3 Prong 30 Amp Generator Cord 25 Feet Heavy Duty NEMA L5-30P/L5-30R 10 Gauge 125V SJTW Yellow Lock Generator Extension Cord Waterproof ETL Listed
huanchain$41.374.8★266 rev
RVMATE 3 Prong 30 Amp Generator Extension Cord 10 Feet
RVMATE$29.864.7★577 rev
huanchain L5-30P/L5-30R 3 Prong 30 Amp Generator Cord 50 FT Heavy Duty 10AWG 125V 3750W SJTW Black Locking Generator Extension Cord Waterproof ETL Listed
huanchain$62.964.8★266 rev
RVMATE 3 Prong 30 Amp Generator Extension Cord 25 Feet
RVMATE$45.314.7★577 rev
Champion Power Equipment 25-Foot 30-Amp 125-Volt Fan-Style Generator Extension Cord (L5-30P to three 5-15R)
Champion Power Equipment$56.364.8★3,520 rev
Newest
by launch date
Vockjour 30 Amp Generator Extension Cord 3 Prong 25FT NEMA L5-30P/L5-30R 10 Gauge Extension Cord Yellow Twist Lock Generator Power Cord Heavy Duty STW 125V 3750W ETL Listed
Vockjour$47.9820 rev
Vockjour 30 Amp Generator Extension Cord 3 Prong 50FT NEMA L5-30P/L5-30R 10 Gauge Extension Cord Yellow Twist Lock Generator Power Cord Heavy Duty STW 125V 3750W ETL Listed
Vockjour$75.1220 rev
EP 10 Ft 30-Amp Generator Extension Cord 3-Prong 125V 3750W NEMA L5-30P/R 10 Gauge SJTW Twist Lock Heavy Duty Power Cord for House RV Black
EP$26.6816 rev
EP 30 Ft 30-Amp Generator Extension Cord 3-Prong 125V 3750W NEMA L5-30P/R 10 Gauge SJTW Twist Lock Heavy Duty Power Cord for House RV Black
EP$55.4916 rev
EP 15 Ft 30-Amp Generator Extension Cord 3-Prong 125V 3750W NEMA L5-30P/R 10 Gauge SJTW Twist Lock Heavy Duty Power Cord for House RV Black
EP$36.8016 rev
Trending
90-day click momentumEP 30 Ft 30-Amp Generator Extension Cord 3-Prong 125V 3750W NEMA L5-30P/R 10 Gauge SJTW Twist Lock Heavy Duty Power Cord for House RV Black
EP$55.494.5★
EP 15 Ft 30-Amp Generator Extension Cord 3-Prong 125V 3750W NEMA L5-30P/R 10 Gauge SJTW Twist Lock Heavy Duty Power Cord for House RV Black
EP$36.804.5★
RVGUARD 25 Foot 30 Amp Generator Cord and Power Inlet Box
RVGUARD$63.884.7★
Champion Power Equipment 2 ft. 30A 250V Generator Adapter Cord
Champion Power Equipment$35.485.0★
EP 10 Ft 30-Amp Generator Extension Cord 3-Prong 125V 3750W NEMA L5-30P/R 10 Gauge SJTW Twist Lock Heavy Duty Power Cord for House RV Black
EP$26.684.5★
What buyers say about l5-30r extension cord
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality”
“As advertised”
“Good Value”
“Heavy works as it should”
“Multiple plugs are a plus”
“It delivers consistent power with solid functionality and dependable construction”
“Flexible”
“Durable, good quality at a great price”
“Easy to use”
“Seems well built”
What buyers complain about
“Horrible Quality”
“severe overheating”
“There is no safe power supply”
“Ruined my 30amp input receptacle too”
“Spend a little bit more money would be okay”
“brings serious fire risk”
“Unfortunately, since the plugs are sealed on both ends, I cant visually verify the thickness of the jacket or confirm the 10-gauge wire”
“I think a more rugged material would have made this even better”
“My main reason for giving 4 instead of 5 stars is the Fast Grip Handle material”
“think 100 foot one would be a bit too heavy and unwieldy”
Top return reasons
Common questions
- Is l5-30r extension cord profitable to sell on Amazon United States?
- The niche generates $41K/yr across 30 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -59.1%. Flapen's verdict: Skip it (39/100).
- How competitive is the l5-30r extension cord niche?
- 18 brands and 39 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 76% of demand.
- What do buyers complain about in l5-30r extension cord?
- Top complaints mined from reviews: Quality-Overall, Heating, Electric Components. The return rate is 4.3%.
- When does demand for l5-30r extension cord peak?
- Demand peaks in Jan–Oct; the busiest month runs 3.4× the quietest.
- What does it cost to enter the l5-30r extension cord niche?
- Listings span $21.69–$75.12; the average listing price is $46.93 (sweet spot $15–$100). The average incumbent carries 380 reviews — the moat a new listing must climb.