Is relay box profitable to sell on Amazon United States?

The niche generates $78K/yr across 18 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -5.6%. Flapen's verdict: Skip it (45/100).

How competitive is the relay box niche?

9 brands and 14 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 83% of demand.

What do buyers complain about in relay box?

Top complaints mined from reviews: Instructions/User Manual/Troubleshooting, Quality-Overall, Functionality-Overall. The return rate is 2.9%.

When does demand for relay box peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the relay box niche?

Listings span $17.70–$62.88; the average listing price is $30.53 (sweet spot $15–$100). The average incumbent carries 450 reviews — the moat a new listing must climb.

relay box

Skip it

A small market ($78K/yr) — this niche doesn't clear our bar today.

Avg price

Incredible$30.53

avg listing price — sweet spot $15–$100

Price range

Incredible$17.70–$62.88

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Great449.56

avg incumbent reviews — the moat a new listing must climb

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Returns

Good2.9%

return rate — above 5% kills the launch gate

Competition

Okay58%

top-5 click share — leaders hold, buyers still browse

Brand share

Okay83%

top-5 brand share — brands hold most of the demand

Conversion

Bad1.9%

search→purchase rate — share of searches ending in a sale

Growth

Bad-5.6%

90-day search growth — must beat 0% to launch

Market size

Bad$78K

$78K/yr · 134K searches

According to Flapen's Amazon United States niche tracking, relay box is a $78K/yr Amazon United States market (134K searches/yr). The top 5 brands hold 83% of demand. Verdict: Skip it — 45/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

relay box market data

Units sold / yr: 3K–4K; avg 100–250/product
Revenue / yr: $92K–$122K; units × avg price
Conversion rate: 1.9%
Avg BSR: #56
Page quality: 0%
Prime: 100%
Sponsored: 94%
Out of stock: 0.0%
Avg brand age: 44 months
Avg seller age: 169 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

9 falling

Sellers

Top-5 brand share

83%

Top 20: 100%

Top-5 click share

58%

Top 20: 100%

Open market

10%

DAIERTEK39%
ONLINE LED STORE14%
Weasch11%
RVBOATPAT11%
FASTSTORM7%
Nilight7%
Open — no brand owns it (3 brands, 10%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -5.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top relay box search terms

relay box57K/yr -0.9%1.9% conv.
fuse relay box12K/yr +5.7%1.7% conv.
relay fuse box9K/yr -6.8%1.7% conv.
fuse and relay box9K/yr -6.8%1.6% conv.
relay block9K/yr -13.2%2.4% conv.
12v relay box10K/yr -23.3%3.0% conv.
relay panel6K/yr -5.1%1.9% conv.
waterproof relay box5K/yr -12.2%0.9% conv.
automotive relay box6K/yr -2.2%2.2% conv.
relay box 12v automotive5K/yr -8.4%2.5% conv.

All search terms

Top relay 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

DaierTek 12V Relay Box 6 Way12 AWG Pre-Wired Waterproof Relay Box 6 Slot ATC/ATO Fuse Relay Block Universal Relay Panel for Automotive Car Marine Boat

DAIERTEK$25.824.5★505 rev

True Mods Waterproof 12V Fuse Relay Box Block Kit w/Pre-Wired Harness [12 & 16AWG] 6 Gang Bosch Style 5Pin 30A/40A Universal Relay & Fuse Panel for DC Auto Automotive Vehicle Car Marine Boat Jeep UTV

ONLINE LED STORE$48.504.5★254 rev

Weasch 12V 6 Way Pre-Wired Fuse Relay Box Kit with Two 80A 4-Pin Relays

Weasch$17.704.4★185 rev

FASTSTORM Fuse Relay Box Relay Block Box Built-in Diodes 6 Way 12 AWG Pre-Wired Waterproof Relay Panel with Relays and Terminals ATC/ATO Fuses Automotive Relay Box 12V for Automotive Car Marine Boat

FASTSTORM$25.564.4★36 rev

RVBOATPAT 12V Fuse Relay Box 6 Way Relay Fuse Box Pre-Wired Waterproof Relays Box with 6 Relays and 12 ATC/ATO Fuses Relay Panel for Automotive Car Marine Boat

RVBOATPAT$26.504.6★325 rev

Newest

by launch date

DaierTek 12V 3 Way Waterproof Relay Box Pre-Wired Fuse and Relay Box 3x4 Pin 40A Relay and 3 ATC/ATO Blade Fuse for Automotive Cars Truck Boat Upgrade

DAIERTEK$29.1115 rev

9mo ago

DaierTek 12V Fuse Box and Relay Block 8 Relay 12 ATC/ATO Blade Fuse Pre-Wired Panel Dustproof Pre-Wired Fuse Relay Box for Automotive Car Marine Boat

DAIERTEK$55.99132 rev

9mo ago

FASTSTORM Fuse Relay Box Relay Block Box Built-in Diodes 6 Way 12 AWG Pre-Wired Waterproof Relay Panel with Relays and Terminals ATC/ATO Fuses Automotive Relay Box 12V for Automotive Car Marine Boat

FASTSTORM$25.5636 rev

9mo ago

Weasch 12V 6 Way Pre-Wired Fuse Relay Box Kit with 4 x 40A 4-Pin Relays

Weasch$25.8937 rev

1y ago

DaierTek Relay Box 12V 10 Way Relay Block and 10 Way ATC/ATO Blade Fuse Panel Pre-Wired Dustproof Fuse Relay Box for Automotive Car Marine Boat

DAIERTEK$62.88132 rev

1y ago

What buyers say about relay box

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall25%

“Excellent quality product”

Assembly/Installation11%

“Easy to install”

Value For Money7%

“Decent for the price”

Design-Overall6%

“design is good”

Advertised Vs Actual Product6%

“Works as advertised”

Efficiency5%

“Works perfectly”

Ease Of Use5%

“It saves a lot of time”

Water Resistance4%

“The box is waterproof”

Ease Of Cleaning2%

“Super clean”

Mounting2%

“much easier than mounting discrete componenets”

What buyers complain about

Instructions/User Manual/Troubleshooting14%

“No Instructions”

Quality-Overall12%

“Quality control is poor”

Functionality-Overall6%

“Didn't work”

Water Resistance5%

“NOT WATERPROOF”

Value For Money5%

“Cheap wasn't even worth the cost”

Durability5%

“LID will break almost immediately”

Size-Overall3%

“are so small”

Strength3%

“The plastic snap covers are brittle”

Material Quality3%

“Very cheap plastic”

Defective Material/Parts3%

“Bad parts”

Top return reasons

Size-Overall34%

Functionality-Overall12%

Compatibility-Overall12%

Defective Material/Parts9%

Mounting8%

Advertised Vs Actual Product6%

Water Resistance3%

Assembly/Installation3%

Instructions/User Manual/Troubleshooting2%

Value For Money2%

Common questions

Is relay box profitable to sell on Amazon United States?: The niche generates $78K/yr across 18 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -5.6%. Flapen's verdict: Skip it (45/100).
How competitive is the relay box niche?: 9 brands and 14 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 83% of demand.
What do buyers complain about in relay box?: Top complaints mined from reviews: Instructions/User Manual/Troubleshooting, Quality-Overall, Functionality-Overall. The return rate is 2.9%.
When does demand for relay box peak?: Demand is steady year-round — the busiest month runs 1.2× the quietest.
What does it cost to enter the relay box niche?: Listings span $17.70–$62.88; the average listing price is $30.53 (sweet spot $15–$100). The average incumbent carries 450 reviews — the moat a new listing must climb.

relay box

relay box market data

Competition & brand share

Demand & seasonality

Top relay box search terms

Top relay box products on Amazon

Top sellers

Newest

Trending

What buyers say about relay box

What buyers love

What buyers complain about

Top return reasons

Common questions

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