Sealed lead acid (SLA) is the market name for the VRLA construction: a lead acid battery whose electrolyte is immobilised and whose case is sealed, so it can be mounted in any orientation, shipped as non-spillable, and forgotten between inspections. XD Battery’s SLA output spans the formats the industry buys: 12V monoblocs for UPS and solar duty (the 100Ah deep-cycle block at 407 × 172 × 240 mm is representative), high-capacity 12V 200Ah and 250Ah units, and 2V cells for stationary strings.
The application map explains the format map. UPS duty wants high-rate 12V blocks that sit on float for years and deliver minutes of heavy current on demand. Solar duty wants deep-cycle plates that survive daily discharge. Telecom sites ask for either — front-terminal 12V blocks for cabinet strings (a format this site covers as a selection guide), or 2V OPzV cells for plant-room strings with decade-scale design lives. The sealed family’s own answers are the 12V blocks and the OPzV cells. The flooded OPzS line is the attended-maintenance sibling: it belongs to the tubular range, not to this sealed family.
The SLA range at a glance
- 12V blocks: 100Ah / 150Ah / 200Ah / 250Ah documented models
- 2V cells: OPzV 800Ah / 1000Ah (sealed gel); flooded OPzS cells are ranged with the tubular line
- Electrolytes: AGM-type and gel, by model
- Warranty: 3 years on documented lead acid models; MOQ documented per model
SLA and VRLA — same thing?
In practice, yes: "sealed lead acid" is the trade name, "valve regulated" the technical one. Our VRLA page covers the technology; this page covers the product range.
Can SLA batteries be mounted on their side?
Sealed construction permits flexible mounting orientations, which is one reason they dominate cabinet installations. Follow the model’s installation notes.