Yuasa SWL+4000 Industrial VRLA Battery - 12V / 135Ah (Ultra High Performance)

The Yuasa SWL+4000 is the absolute top model of the SWL-Plus series in the 12-volt segment. With a massive nominal capacity of 135 Ah and outstanding power density, this block defines the upper limit of what is possible with VRLA technology in this size.

This battery was designed for large-scale consumers who need maximum energy (both capacity and high current). It is the more powerful upgrade to the well-known models of the 120Ah class (such as the SWL3800). With the Eurobat "Very Long Life" classification, the SWL+4000 is the backbone for megawatt UPS systems in hyperscale data centres and critical industrial facilities.

Highlights at a Glance

• Maximum capacity (135 Ah): With 135 Ah this block offers enormous reserves for long backup times. It enables the realisation of long autonomy times without resorting to complex 2V cell systems.
• Ultra High Rate Performance (4000 Watt): The figure "4000" signals the extreme output in watts per block. The SWL+4000 is designed to reliably manage enormous inrush currents and load peaks of modern IT hardware.
• Eurobat "Very Long Life": Classified for a service life of 12+ years (design life up to 15 years). This ensures investment security and minimises maintenance cycles throughout the entire service life of the system.
• HT Element X Technology: The patented alloy of the grid plates minimises internal corrosion. This is particularly important for batteries of this size in order to guarantee uniform ageing of all cells in the block.
• Maintenance-free & Robust: VRLA-AGM technology (Absorbent Glass Mat). The electrolyte is bound, the battery is leak-proof and low-gassing. The housing is extremely robust to safely support the high weight of the plates.
• Compact Powerhouse: Despite the high performance, the battery uses a standardised housing size, which often makes it possible to replace in existing systems without requiring rack modification.

Areas of Application

The SWL+4000 is predestined for heavy-duty applications:

• Large UPS systems: Data centres, banks, insurance companies.
• Telecommunications: Central switching centres (Core Network).
• Energy suppliers: Buffering in power stations and substations.
• Industry: Emergency power supply for production lines.
• Central battery systems: For emergency lighting for large building complexes.

Installation & Safety Instructions

• Critical weight: A single block weighs just under 50 kg. Handling must never be carried out alone. Use mechanical lifting aids or always work in a team (observe occupational safety!).
• Floor load: Before installation, check the point load of your raised floor or the load-bearing capacity of the shelves. A fully equipped cabinet quickly reaches a weight of over a tonne.
• Connection (M8): Here, currents of several thousand amperes can flow in the event of a short circuit. The M8 bolts must always be tightened to 6 Nm.
• Ventilation: Sufficient ventilation of the battery room in accordance with EN 50272-2 is mandatory.

Features

FAQs on Yuasa SWL+4000

Can I use the SWL+4000 as a replacement for the SWL3800?

Yes. The SWL+4000 is the direct power upgrade to the SWL3800. The dimensions (footprint approx. 340 x 173 mm) are generally compatible. By replacing you gain in capacity and maximum discharge power.

Do I need special connection cables because of this weight?

Not because of the weight, but because of the power. Enormous currents flow at 4000 watts per block. You need connectors with a sufficient cross-section (often 50mm² or 70mm² and more, depending on the string length), to avoid voltage drops and overheating. Only use certified jumpers.

Is the SWL+4000 also available in FR (flame retardant)?