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SWL+4300 SWL+4300-12 Yuasa Battery Capacity Ah (20-HR): 140
SWL+4300 SWL+4300-12 Yuasa Battery Capacity Ah (20-HR): 140 - Image 2
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SWL+4300 SWL+4300-12 Yuasa Battery Capacity Ah (20-HR): 140

  • ✔ Trusted UK Supplier
  • ✔ Fast UK Delivery Available
  • ✔ Manufacturer Warranty Included
  • ✔ Expert Advice Available
  • ✔ Protects equipment from power loss
  • ✔ Prevents downtime and data loss
  • ✔ Suitable for business and home setups

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    • Description
    • Technical Data
    • Onsite Maintenance
    • Downloads

    Building on the proven performance of the renowned SWL range, the Yuasa SWL+ series retains the robust design you already trust—now enhanced with advanced innovations that redefine reliability, longevity and power. Designed for critical standby applications and high-rate discharge requirements, SWL+ takes industrial battery technology to the next level.

    Key advancements of the SWL+ series: 

    • Extended design life and EUROBAT classification
      15 year design life at 20°C, EUROBAT classified as 12+ years “Very Long Life providing a strong return on investment and complete peace of mind. 12 years design life at 25°C”.
    • Enhanced high-rate performance
      Optimised high-rate capacity ratings to meet the most demanding applications.
    • Hybrid pure Lead technology
      Constructed using a specialised hybrid combination of primary pure Lead and advanced recycled alloy to optimise performance and provide market-leading service life.
    • HT Element X Alloy™ technology
      Exclusive to GS Yuasa, HT Element X Alloy™ technology provides longer life by reducing positive grid corrosion and reducing water loss.
    • Delivers CAPEX savings and cuts energy costs through longer life, fewer replacements and allowing 25°C room temps while maintaining a 12-year life.
    • Sustainable design and manufacture Integrates recycled materials and cutting-edge processes in our UK factory for minimal environmental impact without compromising performance—backed by 98% recyclability for a truly circular lifecycle.
    • 100% quality inspection and guaranteed capacity
      Rigorous quality control at each manufacturing stage to ensure every SWL+ battery is fully tested and ready to perform from the moment it leaves our factory.
    • Certified safety, performance and durability
      Certified to UL 1989. Produced and tested in ISO and UKAS certified facilities to comply with the highest industry standards.
    • Field-proven back-up power
      Trusted by iconic buildings, businesses, brands and operations across Europe, the SWL+ series continues our long-standing legacy of dependable standby solutions.
    • Fully compatible with existing SWL installations Can be installed as a direct replacement for UK manufactured SWL batteries where required for seamless integration with existing battery systems.

     Built on the proven SWL foundations

    • Enhanced energy density
      Offers higher discharge capacity than standard equivalents, making it an excellent choice for high-rate discharge applications.
    • Superior deep discharge recovery
      Ensures dependable performance and longevity, even after deep discharges.
    • Valve regulated, maintenance free design
      Advanced gas recombination technology reduces the release of gas, virtually eliminating the need for maintenance.
    • Versatile orientation
      Can be installed in various positions (excluding inverted use) with no loss of performance.
    • Flame retardant options

    Standard cases meet UL94:HB, with UL94:V0 flame retardant options available to enhance safety.

    Experience the future of standby power with the new Yuasa SWL+ series. Combining the trusted strengths of our SWL range with pioneering design improvements, SWL+ ensures you are fully powered and always prepared. Rely on a name that Europe’s most iconic sites and brands have trusted for decades. Rely on GS Yuasa.

    Capacity Ah (20-HR) 140
    Length (mm) 350
    Width (mm) 173
    Height (mm) 272
    Nominal Voltage 12
    NCC Class N/A

    Nationwide Onsite Maintenance is as easy as saying Bronze, Silver, Gold, Platinum.

    1: Plug and Play (400VA-3kVA) – Extended Warranty Contracts and Maintenance contracts

    For plug & play UPS Critical Power offers you a full range of distributed service packs. These competitively priced turn-key solutions optimize your UPS performances and enhance the availability of your equipment while meeting your financial constraints and technical requirements.

    Warranty Plus Extends your standard warranty up to 6 years, next working day replacement* with labour or without. Green tick
    Intervention, Provides one preventative maintenance visit, planned visit inside our outside hours. Green tick
    Battery Plus, Provides replacement batteries to site, next working day replacement or same day Green tick

    2: Hardwired (4kVA Upwards including Three Phase UPS) – Maintenance Contracts

    No matter what, your UPS, Generator, Cooling, Switchgear or Electrical Hardware must be ready to perform at all times. While every power solution we supply is backed-up by a comprehensive warranty with the manufacturer, maintenance plans to ensure business continuity are highly recommended, particularly for UPS systems from 4kVA. In particular, the battery set is of prime importance, and must be in good working order. With other consumables, such as fans and DC capacitors requiring regular maintenance and inspection logs reviewed to predict potential future problems.

    Services Included

    Silver Level

    Gold Level

    Platinum Level

    Platinum Plus

     
    Technical Hotline 24/7 Yes Yes Yes Yes Green tick
    Preventative Maintenance Yes Yes Yes Yes Green tick
    Remote Monitoring 24/7 Yes Yes Yes Yes Green tick
    Firmware Upgrades Yes Yes Yes Yes Green tick
    Emergency Response Yes Yes Yes Yes Green tick
    Labour Yes Yes Yes Yes Green tick
    Parts Yes Yes Yes option Green tick
    Monthly Event/Status Report option option option option Green tick
    Onsite Crash Kit option option option onsite Green tick
    Response Time 12 working hours 8 working hours 4 clock hours 4 clock hours Green tick
    Guaranteed Fix time – – – 4 Clock hours Green tick

    3: 24×7 Remote Monitoring Contracts –

    Remote monitoring of UPS, Generators, Air Conditioning, Site Access and Environmental Systems is essential to allow swift offsite investigation of fault reports and real-time monitoring of the site status, allowing the correct response to be created and dispatched to site.

    Engineer Installation and configuration during normal hours Green tick
    24×7 flexible status and remote monitoring. Green tick
    Encrypted communication, allowing safe offsite monitoring Green tick
    Alarms and events emailed and SMS texted automatically Green tick
    Firewall Friendly Green tick
    Cloud based status overview and multiple sites status on one screen Green tick
    Allows First Fix Response to Site Green tick

    4. IR Thermal Imaging Surveys – Infrared electrical inspection. Infrared electrical testing finds hot, dangerous problems quickly. Infrared electrical inspections find hot spots caused by defects in connections and components. – Contact us for more information.

    Detect system overloads, loose defective components and damaged switchgear. Infrared electrical testing finds hot, dangerous problems quickly. Infrared electrical inspections find hot spots caused by defects in connections and components.

    Infrared thermography is used to find areas of excess heat (caused by increased resistance) so that problems can be corrected before a component fails, causing damage to the component, creating safety hazards and productivity loss. Because increased heating is a sign of failure, infrared is the best diagnostic tool available for finding these hot connections in the early stages of degeneration.

    5. Switchgear – Contact us for more information.

    Switchgear maintenance is essential for efficient save plant operation and prolonged life span in the field Switchgear should be maintained as follows.

    • Live Maintenance – Unintrusive and consists of taking metering values, carrying out visual inspections and a thermal imaging survey of the switchboard. This is recommended to be carried out yearly.
    • Breaker Maintenance – Switchboard would need to be Isolated and all ACB’s and MCCB’s are maintained including visual and mechanical checks, greasing and secondary injection testing of the trip units. This is recommended to be carried out every 2 years.
    • Full Isolated Maintenance – Switchboard would need to be fully isolated from upstream supplies (HV). Breakers are maintained as per the above but also full maintenance carried out of the Switchboard to clean all compartments and carry out tightness checking of busbars and terminations etc. This is recommended to be carried out every 4 years.
    Product Datasheet

    We are here when you need us most

    As a client of Critical Power Supplies you can expect 24×7 support whether on the phone, email or on site because we always deliver on our promise to keep you operational and your satisfaction is paramount to everything we do.

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