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    Electrical4less Reviews 4.9 Based on 1516 reviews
    UK Mainland Free Delivery £75 + VAT
    30 Day Return Policy
    Next Day Delivery Cut Off Time 3PM*

    Interfaces - PSUs - Accessories

    Shop Fire Alarm Interfaces, PSUs & Accessories at Electrical4Less. This range covers power supply units, interface modules, and system accessories for reliable integration and operation. Fire Alarm Interfaces, PSUs & Accessories support safe, compliant fire alarm installations across all commercial environments.

    ESP BD1 50M Beam Detector

    ESP BD1 50M Beam Detector
    Delivery usually within 1 - 3 working days*
    SKU: BD1
    £1,290.59
    ESP BD1LRK Bd1 Reflective Long

    ESP BD1LRK Bd1 Reflective Long
    Delivery usually within 1 - 3 working days*
    SKU: BD1LRK
    £166.70
    ESP BPS-1 24Vdc 1A Boxed Power Supply

    ESP BPS-1 24Vdc 1A Boxed Power Supply
    Delivery usually within 1 - 3 working days*
    SKU: BPS-1
    £72.21
    ESP BPS-2 24Vdc Boxed Power Supply 24V 2A

    ESP BPS-2 24Vdc Boxed Power Supply 24V 2A
    Delivery usually within 1 - 3 working days*
    SKU: BPS-2
    £104.41
    ESP BPS-5 Boxed Power Supply 24V 5A

    ESP BPS-5 Boxed Power Supply 24V 5A
    Delivery usually within 1 - 3 working days*
    SKU: BPS-5
    £152.31
    ESP DOCBOX Document Box

    ESP DOCBOX Document Box
    Delivery usually within 1 - 3 working days*
    SKU: DOCBOX
    £15.49
    ESP DOCBOXK Docbox Spare Keys

    ESP DOCBOXK Docbox Spare Keys
    Delivery usually within 1 - 3 working days*
    SKU: DOCBOXK
    £1.52
    ESP DR916-24 Conventional Fire Alarm Door Holder 24V DC

    ESP DR916-24 Conventional Fire Alarm Door Holder 24V DC
    Delivery usually within 1 - 3 working days*
    SKU: DR916-24
    £34.55
    ESP DR916-240 Conventional Fire Alarm Door Holder 240V DC

    ESP DR916-240 Conventional Fire Alarm Door Holder 240V DC
    Delivery usually within 1 - 3 working days*
    SKU: DR916-240
    £34.55
    ESP DR916-FMB Floor Mounting Bracket

    ESP DR916-FMB Floor Mounting Bracket
    Delivery usually within 1 - 3 working days*
    SKU: DR916-FMB
    £13.72
    ESP DR916-KP Spare Keeper Plate

    ESP DR916-KP Spare Keeper Plate
    Delivery usually within 1 - 3 working days*
    SKU: DR916-KP
    £16.89
    ESP MAGAUXISORP Auxiliary Isolation Switch – Red DPDT

    ESP MAGAUXISORP Auxiliary Isolation Switch – Red DPDT
    Delivery usually within 1 - 3 working days*
    SKU: MAGAUXISORP
    £26.81
    ESP MAGAUXISOWP Auxiliary Isolation Switch – White DPDT

    ESP MAGAUXISOWP Auxiliary Isolation Switch – White DPDT
    Delivery usually within 1 - 3 working days*
    SKU: BD1-1
    Read more
    ESP MAGDUOBBB Battery Expansion Box Dark Grey

    ESP MAGDUOBBB Battery Expansion Box Dark Grey
    Delivery usually within 1 - 3 working days*
    SKU: MAGDUOBBB
    £151.64
    ESP MAGDUOCC4 Conventional 4 Zone Expansion Card

    ESP MAGDUOCC4 Conventional 4 Zone Expansion Card
    Delivery usually within 1 - 3 working days*
    SKU: MAGDUOCC4
    £172.57
    ESP MAGDUOCPC Resettable Surface Call Point Cover - Pack of 1

    ESP MAGDUOCPC Resettable Surface Call Point Cover – Pack of 1
    Delivery usually within 1 - 3 working days*
    SKU: MAGDUOCPC
    £6.92
    ESP MAGDUOCPK Spare Keys for MAGDUO Call Point - Pack of 5

    ESP MAGDUOCPK Spare Keys for MAGDUO Call Point – Pack of 5
    Delivery usually within 1 - 3 working days*
    SKU: MAGDUOCPK
    £5.07
    ESP MAGDUOIOR Input / Output Relay Module

    ESP MAGDUOIOR Input / Output Relay Module
    Delivery usually within 1 - 3 working days*
    SKU: MAGDUOIOR
    £76.28
    ESP MAGDUOPCPS PC Programming Software

    ESP MAGDUOPCPS PC Programming Software
    Delivery usually within 1 - 3 working days*
    SKU: MAGDUOPCPS
    £55.71
    ESP MAGDUOPK Spare Keys For MAGDUO Panels - Pack of 2

    ESP MAGDUOPK Spare Keys For MAGDUO Panels – Pack of 2
    3 In Stock
    More available within 1 - 3 working days*
    SKU: MAGDUOPK
    £3.53

    Proudly serving electricians and construction projects across Fulham, Chelsea, and the wider London area — and nationwide with fast next-day delivery by courier.

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    Next Day Delivery

    Cut-Off Time and Order Information
    To ensure your order qualifies for next day delivery, please place your order by 3:00 PM. This is subject to all items being available on the shelf at the time of your order. For orders where the total value exceeds £150 + VAT (double our standard carriage-paid order value of £75 + VAT), we are happy to split the delivery into two shipments if some items are needed urgently and others are not immediately available. If you have any questions or need further assistance, feel free to reach out to us via WhatsApp for live support. We’re here to help!

    In Stock Delivery Policy

    Free Next-Day Delivery Over £75 + VAT:
    Orders above £75 + VAT qualify for free next-day delivery via DPD for in-stock items. While we strive for timely dispatch, we recommend placing orders early to avoid potential delays. Once dispatched, unexpected issues may arise despite the courier’s efforts.

    Orders Below £150 + VAT:
    To keep costs manageable, we dispatch your order once all items are ready, including products with longer lead times.

    Need items faster? You can pay for an additional delivery service to receive in-stock items sooner. Simply email us with your order details, and we’ll send you a payment link for the extra delivery cost.

    Orders Above £150 + VAT:
    For larger orders, we can split delivery at no extra cost. In-stock items will be sent immediately, with the remaining items dispatched once available.

    Backorder Delivery Policy

    Items with Lead Times (e.g., 1–3 Working Days):
    This means we need to source the product from our supplier before sending it to you. The estimated dispatch time is displayed on each product page.

    Out of Stock at Supplier:
    If an item is unavailable at the supplier, we will contact you promptly. You’ll have the option to choose an alternative product or request a full refund.

    Didn't find what you're looking for?

    No problem — message us directly on WhatsApp and we’ll help you out.

    We usually respond within minutes during working hours.

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