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The fixing centres are published

Keltorio Pair, 300 A, 12–48 V, M8, 163 mm fixing centres

A red and black 300 A busbar pair for 12 V to 48 V in rust-free brass with stainless clamps, a flame-retardant nylon base and a dust-proof cover.

Keltorio 300 A busbar pair in red and black with covers

Keltorio Pair, 300 A, 12–48 V, M8, 163 mm fixing centres

A red and black 300 A busbar pair for 12 V to 48 V in rust-free brass with stainless clamps, a flame-retardant nylon base and a dust-proof cover.

Current rating
300 A across 12 V to 48 V, from the title
Studs
M8, from the title
Material
Rust-free brass plates, stainless steel clamps and a flame-retardant nylon base, first bullet
Plating
Nowhere in the listing — the brass is described as rust-free rather than plated
Cover
A dust-proof plastic cover with insulated rubber nuts protecting the exposed terminals, first and third bullets
Mounting
5.5 mm fixing holes at 163 mm centres, fifth bullet — the only busbar here to publish them
Pole separation
Supplied as a pair, red and black, from the title
Amazon reference
B0GVSN1FH1 (same reference on 5 Amazon marketplaces)
EAN
0707191459050
  • The fixing holes and their spacing are published — 5.5 mm at 163 mm centres
  • Three materials named individually, each for its own part
  • No plating stated, which is what keeps a joint from oxidising

Best for: An installation where the busbar has to be drilled and bolted to a known panel.

≈ €37
Check price on Amazon

Specifications

Current rating
300 A across 12 V to 48 V, from the title
Studs
M8, from the title
Material
Rust-free brass plates, stainless steel clamps and a flame-retardant nylon base, first bullet
Plating
Nowhere in the listing — the brass is described as rust-free rather than plated
Cover
A dust-proof plastic cover with insulated rubber nuts protecting the exposed terminals, first and third bullets
Mounting
5.5 mm fixing holes at 163 mm centres, fifth bullet — the only busbar here to publish them
Pole separation
Supplied as a pair, red and black, from the title
Amazon reference
B0GVSN1FH1 (same reference on 5 Amazon marketplaces)
EAN
0707191459050

Three hundred amps with the drilling published.

The figure that makes it fittable

5.5 mm fixing holes at 163 mm centres. Three busbars in this catalogue; one tells you how to drill for it. A panel can be marked and prepared before the part is even in the room.

The materials

Rust-free brass plates. Stainless steel clamps. A flame-retardant nylon base. A dust-proof plastic cover. Four parts, four materials, each named for its own job.

The insulated nuts

Rubber-insulated nuts under the cover. The studs on a battery bus are permanently live, and a dropped spanner across two of them is the accident this prevents.

The rating

300 A across 12 V to 48 V, stated as one figure for the whole range. The Aigreat pair in this family ties its rating to 12 V specifically, which says more.

What is not stated

Any plating. The brass is described as rust-free, which is not the same as plated — plating is what keeps the contact face from oxidising where a lug presses on it.

Availability

German, French, Italian and Spanish Amazon stores quoted 37 € to 38 € when this page was compiled.

American Amazon catalogue carries an entry for it, with nobody selling.

British Amazon store returned nothing at all, so the buy button there runs a search instead of landing on an empty page.

These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.

Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.

More busbars

  • kidodI 400 A copper busbars with M10 studs and covers

    kidodI Pair, 400 A continuous, 12–48 V, 8 × M10, tinned copper

    A pair of 400 A busbars for 12 V to 48 V with eight M10 studs each, in thickened tinned copper with a glass-fibre reinforced nylon housing and removable side windows.

    Current rating
    Up to 400 A continuous, compatible with all common 12 V to 48 V DC systems, first bullet — the highest in this family
    Studs
    Eight M10 screw connections per bar, first bullet — twice the count and a larger thread than either alternative here
    Material
    A thickened copper plate in a glass-fibre reinforced nylon housing, second bullet
    Plating
    Tinned, described as giving the lowest contact resistance, second bullet
    Cover
    A housing with removable side windows for tool-free wiring, fifth bullet
    Mounting
    Four fixings supplied, with a non-slip foam layer underneath for stability under vibration, third and fifth bullets
    Pole separation
    Two 400 A busbars supplied, fifth bullet
    Amazon reference
    B0H1MLZS17 (same reference on 5 Amazon marketplaces)
    EAN
    0614587195662
    • Copper rather than brass, which is the better conductor of the two
    • Eight M10 studs per bar, the most connections and the largest thread here
    • The most expensive busbar in this family

    Best for: A large battery bank where eight heavy cables meet at each pole.

    ≈ €47
    Check price on Amazon
  • Aigreat busbar pair in red and black with clear covers

    Aigreat Pair, 250 A at 12 V, 48 V max, 4 × M8 plus 3 screw terminals

    A red and black busbar pair rated 250 A at 12 V with a 48 V DC maximum, each with four M8 studs and screw terminals, in nickel-plated brass with covers.

    Current rating
    250 A when working in a 12 V circuit, second bullet
    Studs
    Four M8 bolt terminals and three number 8 screw terminals per bar, fifth bullet
    Material
    Brass busbar plates, third bullet
    Plating
    Nickel-plated, for low contact resistance, third bullet
    Cover
    Supplied with a cover, from the title
    Mounting
    Nowhere in the listing
    Pole separation
    Supplied as a pair — one red positive bar and one black negative bar, first bullet — so the poles are physically separate units
    Amazon reference
    B0F6SMQ4P3 (same reference on 6 Amazon marketplaces)
    EAN
    0717504929859
    • A pair, red and black, so both poles are covered in one purchase
    • Eight ring terminals included, plus screw terminals on each bar
    • The mounting is not described

    Best for: A 12 V installation where four heavy feeds leave each pole.

    ≈ £24 / €26
    Check price on Amazon

Others on the same shelf

  • Brennenstuhl Garant V2 cable reel with three sockets and a carrying handle

    Brennenstuhl Garant V2, 25 m, IP44, three sockets with self-closing lids, cablepilot handle

    A twenty-five metre IP44 outdoor cable reel in H05VV-F3G1.5 with three splash-proof sockets with self-closing lids and overheat protection.

    Cable length
    25 m, first bullet
    Cross-section
    H05VV-F3G1.5, first bullet
    Coiled
    Nowhere in the listing
    Uncoiled ratings
    Nowhere in the listing — no wattage or amperage appears anywhere
    Thermal cut-out
    Overheat protection for maximum safety, first bullet; the mechanism is not described
    Socket count
    Three earthed sockets, splash-proof to IP44, with SELF-CLOSING LIDS, second bullet
    Ingress rating
    IP44; stated as suitable for temporary and time-limited outdoor use, second bullet
    Construction
    A special-plastic drum body on a galvanised carrying frame with a rotating handle for comfortable rewinding; a braking cam on the rear fixes the drum during transport; the cablepilot carrying handle guides the cable and stops it slipping while winding and unwinding, third to fifth bullets
    Amazon reference
    B0DM5J8B6Q (same reference on 5 Amazon marketplaces)
    EAN
    4007123695119
    • Self-closing socket lids, so an unused outlet is covered without anyone remembering
    • A carrying handle that doubles as a cable guide during winding
    • No wattage or current rating anywhere in the listing

    Best for: Outdoor work where the reel is carried, wound and unwound constantly.

    ≈ €61
    Check price on Amazon
  • REV 25 m black outdoor cable reel on a steel stand

    REV 25 m, IP44, four sockets, 3000 W uncoiled, thermal switch with restart lock

    A twenty-five metre IP44 outdoor cable reel with four splash-proof sockets rated 3000 W uncoiled, with a thermal switch and restart lock on a steel stand.

    Cable length
    25 m, first bullet
    Cross-section
    H05VV-F 3G1.5 mm², fifth bullet
    Coiled
    Nowhere in the listing — only the uncoiled figure is given
    Uncoiled ratings
    Maximum 3000 W at 230 V WITH THE CABLE UNCOILED, third bullet — THE ONLY REEL IN THIS FAMILY TO TIE ITS RATING TO THE CABLE BEING UNWOUND
    Thermal cut-out
    A thermal switch with a restart lock, second bullet — it does not re-energise by itself after cooling
    Socket count
    Four splash-proof PVC earthed sockets rated IP44, second bullet
    Ingress rating
    IP44, second bullet; the reel is stated to be for TEMPORARY outdoor use, first bullet
    Construction
    Impact-resistant plastic housing on a painted steel tube stand with cable guide and a sliding parking brake, a rotating handle, a sprung drum bearing, a two-colour carrying handle and a cable clip; cable box 240 × 160 × 315 mm, third to fifth bullets
    Amazon reference
    B0FKNCK9ZV (same reference on 5 Amazon marketplaces)
    EAN
    4006341740076
    • The rating is stated as applying with the cable uncoiled, which no other reel here does
    • A restart lock on the thermal switch, so it does not re-energise itself unattended
    • The coiled rating itself is still not published, only that 3000 W applies uncoiled

    Best for: Outdoor work where the reel gets fully unwound before anything is plugged in.

    ≈ €62
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  • EMOS 25 m cable reel with four Schuko sockets

    EMOS 25 m, H05VV-F3G 1.5, four sockets, thermal fuse, IP20 indoor

    A twenty-five metre indoor cable reel in H05VV-F3G 1.5 with four Schuko sockets, a built-in thermal fuse and an IP20 rating.

    Cable length
    25 m, first bullet
    Cross-section
    1.5 mm², second bullet
    Coiled
    Not published separately from the uncoiled figure
    Uncoiled ratings
    230 V, 16 A, maximum load 3680 W, first bullet
    Thermal cut-out
    An integrated thermal fuse that switches the sockets off if the cable overheats, third bullet
    Socket count
    Four Schuko sockets, first bullet
    Ingress rating
    IP20 — designed for indoor use, fourth bullet, though the same bullet also names gardens
    Construction
    High-impact PVC with a shock-absorbing, stable frame, second bullet; EMOS is named as a Legrand brand, fifth bullet
    Amazon reference
    B014WKT9N2 (same reference on 6 Amazon marketplaces)
    EAN
    8595025321220
    • A thermal fuse with its action described: it switches the sockets off
    • IP20 stated outright rather than left ambiguous
    • The fourth bullet says IP20 indoor and names gardens in the same sentence

    Best for: A workshop or a garage where the reel never sees rain.

    ≈ €34
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All busbars