Yuasa SWL+4000FR Industrial VRLA battery - 12V / 135Ah (Flame retardant / Ultra High Performance)

The Yuasa SWL+4000FR is the ultimate energy solution for high-security areas. It combines the massive capacity of 135 Ah and the extreme power density of the SWL-Plus top models with a housing of the highest fire protection class (UL94 V-0).

This 12-volt block was developed for use in hyperscale data centres and critical industrial facilities, where two factors are non-negotiable: Maximum availability (performance) and maximum building protection (safety). With a unit weight of almost 50 kg, this battery is a pure powerhouse that supports megawatt loads and is designed for a service life of 12+ years.

Highlights at a glance

• FR safety housing (Flame Retardant): The housing is made of flame-retardant ABS plastic in accordance with standard UL94 V-0. In the event of fire, the material self-extinguishes and prevents flaming dripping. This is often the basic prerequisite for insurance cover in server rooms and public facilities.
• Maximum capacity (135 Ah): With 135 Ah this block offers enormous energy reserves. It enables long autonomy times in UPS systems, without the need for complex and maintenance-intensive 2-volt cell systems.
• Ultra High Rate Performance (4000 Watt): The indicator "4000" stands for the extreme wattage per block. The SWL+4000FR is designed to safely handle the enormous inrush currents and load peaks of modern IT infrastructure.
• Eurobat "Very Long Life": Classified for a service life of 12+ years (design life up to 15 years). This guarantees investment security and minimises maintenance costs for more than a decade.
• HT Element X technology: The patented hybrid alloy of the grid plates minimises internal corrosion and makes the massive block resistant to uneven ageing and temperature fluctuations.
• Maintenance-free & Safe: VRLA-AGM technology (Absorbent Glass Mat). The electrolyte is bound, the battery is leak-proof, low-gassing (internal recombination) and does not require topping up with water.

Areas of application

The SWL+4000FR is the standard choice for heavy-duty applications in sensitive areas:

• Data centres (Data Center): Maximum power with maximum fire protection.
• Large UPS systems: Banks, insurance companies, hosting providers.
• Telecommunication: Central switching stations (Core Network).
• Energy suppliers: Buffering in power stations and substations.
• Safety lighting: Large central battery systems (ZSV).

Installation & safety instructions

• Critical weight: A single block weighs almost 50 kg. Installation must never be carried out alone ("two-person lift" or lifting equipment). Pay strict attention to the point load of your raised floor in the data centre!
• Connection (M8): In the event of a short circuit, currents of several thousand amperes flow here. The M8 bolts must be tightened to 6 Nm. A loose contact can immediately lead to massive heat generation at this power.
• FR compliance: Never replace an FR block with a standard block, as this downgrades the fire protection class of the entire string ("chain").
• Ventilation: Adequate ventilation of the battery room in accordance with EN 50272-2 is mandatory.

Features

FAQs on Yuasa SWL+4000FR

What is the difference to the standard SWL4000?

Technically (electrically) they are identical. The difference is in the housing material.

• SWL4000: Standard ABS (UL94 HB).
• SWL4000FR: Flame retardant (UL94 V-0). The extra charge for the FR version is an investment in safety and often a requirement of building insurance.

Do I need special tools for installation?

You will definitely need insulated tools (torque wrench, spanner). With batteries of this size, a short circuit is extremely dangerous (arc, molten metal). Due to the M8 connection you need suitable sockets/spanner sizes.

How many of these batteries fit in a cabinet?