Is split charge relay kit profitable to sell on Amazon United Kingdom?

The niche generates £62K/yr across 13 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -10.4%. Flapen's verdict: Skip it (47/100).

How competitive is the split charge relay kit niche?

11 brands and 15 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 80% of demand.

What do buyers complain about in split charge relay kit?

Top complaints mined from reviews: Charging, Quality-Overall, Assembly/Installation. The return rate is 1.9%.

When does demand for split charge relay kit peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the split charge relay kit niche?

Listings span £16.68–£69.97; the average listing price is £37.43 (sweet spot $15–$100). The average incumbent carries 142 reviews — the moat a new listing must climb.

split charge relay kit

Skip it

A small market ($62K/yr) — this niche doesn't clear our bar today.

Avg price

Incredible£37.43

avg listing price — sweet spot $15–$100

Price range

Incredible£16.68–£69.97

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

Review moat

Great141.62

avg incumbent reviews — the moat a new listing must climb

Returns

Great1.9%

return rate — above 5% kills the launch gate

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Conversion

Good4.7%

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

Brand share

Okay80%

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

Competition

Bad72%

top-5 click share — a locked-up shelf

Growth

Bad-10.4%

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

Market size

Bad£62K

£62K/yr · 36K searches

Signals Low Review Barrier

According to Flapen's Amazon United Kingdom niche tracking, split charge relay kit is a £62K/yr Amazon United Kingdom market (36K searches/yr). The top 5 brands hold 80% of demand. Verdict: Skip it — 47/100.

Data updated Jul 18, 2026 · scored weekly · How we score niches

split charge relay kit market data

Units sold / yr: 1K–2K; avg 100–250/product
Revenue / yr: £47K–£56K; units × avg price
Conversion rate: 4.7%
Avg BSR: #132
Page quality: 0%
Prime: 85%
Sponsored: 92%
Out of stock: 23.1%
Avg brand age: 51 months
Avg seller age: 210 days

Competition & brand share

The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

Top-5 brand share

80%

Top 20: 100%

Top-5 click share

72%

Top 20: 100%

Open market

16%

CHAMSUREUK46%
Heart Horse14%
BURNTOP11%
CISSIYOG5%
JAOGAUS4%
Joinfworld4%
Open — no brand owns it (5 brands, 16%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -10.4% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top split charge relay kit search terms

split charge relay kit25K/yr -12.3%4.2% conv.
split charger for leisure battery kit6K/yr -18.7%3.1% conv.
leisure battery kit4K/yr +18.1%0.7% conv.

All search terms

Top split charge relay kit 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★)1 product missing review or click data not plotted

All 13 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

5M 12V 140 Amp Split Charge Relay Kit Voltage Sensitive Relay Kit with LED Screen Display VSR Smart Dual Battery Isolator Battery Automatic Disconnect Switch for Campervan SUV ATV RV Boat Vehicles

CHAMSUREUK£42.774.2★117 rev

5M 12V 140 Amp Split Charge Relay Kit VSR Smart Dual Battery Isolator Battery Automatic Disconnect Switch Voltage Sensitive Relay Kit with LED Screen Display for Campervan SUV ATV RV Boat Vehicles

BURNTOP£41.944.2★49 rev

Heart Horse 3m Split Charge Relay Kit 12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen Voltage Display for Truck SUV RV ATV UTV Boat

Heart Horse£32.894.4★504 rev

12V 140 Amp Split Charge Relay VSR Smart Dual Battery Isolator Automatic Disconnect Switch Voltage Sensitive Relay Kit with LED Screen Display for Campervan Van Truck SUV RV ATV UTV Boat

CHAMSUREUK£16.684.4★80 rev

Split Charge Relay Kit Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay Ror Car Caravan Off-road Truck SUV RV ATV UTV Boat

CISSIYOG£28.084.4★91 rev

Newest

by launch date

Split Charge Relay Kit Smart Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay kit for Car Caravan Off-road Truck SUV RV ATV UTV Boat

NORLYT£33.281 rev

4mo ago

12V Split Charge Relay Kit 5M 140 Amp Smart Dual Battery Isolator Kit with Led Voltmeter Manual/Auto Mode Waterproof Voltage Sensitive Relay VSR Kit for Truck ATV UTV Boat RV

Yeqqzq£36.562 rev

7mo ago

Joinfworld 3M 140 Amp 12V Split Charge Relay Kit with Led Voltmeter Manual/Auto Mode Waterproof Voltage Sensitive Relay Smart Dual Battery Isolator for Marine Truck ATV UTV RV Boat Vehicles

Joinfworld£33.970 rev

7mo ago

3m Split Charge Relay Kit 12v 140amp Leisure Battery Kit Voltage Sensitive Relay VSR Smart Dual Battery Isolator Kit for camper auto van

UCkasayfy£36.04108 rev

1y ago

12V 140 Amp Split Charge Relay VSR Smart Dual Battery Isolator Automatic Disconnect Switch Voltage Sensitive Relay Kit with LED Screen Display for Campervan Van Truck SUV RV ATV UTV Boat

CHAMSUREUK£16.6880 rev

1y ago

What buyers say about split charge relay kit

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

What buyers love

Value For Money24%

“Value for money”

Quality-Overall22%

“Good quality”

Advertised Vs Actual Product13%

“Works as expected”

Efficiency9%

“Works perfect”

Ease Of Use8%

“was easy to use”

Charging7%

“Good slipt charge unit easy fitted too”

Size-Overall7%

“Easy fit”

Instructions/User Manual/Troubleshooting4%

“Came with instructions”

Battery Life4%

“Charges the second battery properly”

Durability2%

“Ten years now,no issues”

What buyers complain about

Charging17%

“its not turning on when charging”

Quality-Overall11%

“Very poor”

Assembly/Installation11%

“Had a bit of time to get the wiring set up. still needs to be tidied”

Value For Money11%

“they cost minimum £10 extra”

Size-Overall11%

“Not fit for purpose”

Battery Life11%

“drained my starter battery”

Advertised Vs Actual Product6%

“Description says kit. however it is only the box. no wires or screws”

Functionality-Overall6%

“Didn't work”

Mounting6%

“no wires or screws”

Display-Overall6%

“Didn't work display wouldent even light up”

Top return reasons

Functionality-Overall24%

Compatibility-Overall18%

Defective Material/Parts10%

Size-Overall10%

Quality-Overall6%

Battery Life5%

Assembly/Installation4%

Heating4%

Smell4%

Advertised Vs Actual Product4%

Common questions

Is split charge relay kit profitable to sell on Amazon United Kingdom?: The niche generates £62K/yr across 13 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -10.4%. Flapen's verdict: Skip it (47/100).
How competitive is the split charge relay kit niche?: 11 brands and 15 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 80% of demand.
What do buyers complain about in split charge relay kit?: Top complaints mined from reviews: Charging, Quality-Overall, Assembly/Installation. The return rate is 1.9%.
When does demand for split charge relay kit peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the split charge relay kit niche?: Listings span £16.68–£69.97; the average listing price is £37.43 (sweet spot $15–$100). The average incumbent carries 142 reviews — the moat a new listing must climb.