What does the -33 mean, and can I get a smaller AVR45 cell?

The suffix is the plate count. East Penn's Form 1359 lists fifteen cells from the AVR45-5 at 91 Ah to the AVR45-33 at 731 Ah, in two-plate steps, all 6.70 inches deep and 16.11 inches tall. This page lists the -33; the other fourteen are quoted on request from the same flyer. Send the capacity your plant needs and a specialist names the plate count that meets it.

How does a 2V cell string compare with 12V blocks for a 48V plant?

Twenty-four AVR45-33 cells in series give 731 Ah at 48V; the largest 12V Unigy I block, the 12AVR200ET, gives 200 Ah from four blocks. Cells win on capacity per string and on the ability to replace one weak cell rather than a whole block; blocks win on installation simplicity and on the small-site footprint. Where a plant needs more than a few hundred ampere-hours per string, cells are the usual route, which is where the AVR45 sits.

Why does East Penn publish a cycle life for a float battery?

Because the AVR45 range is sold into railway and utility work as well as telecom, and those applications cycle the battery. The published figure is 2,400 cycles at 20 percent depth of discharge. For a telecom float string that discharges only during outages, the figure is reassurance rather than a sizing input; for a crossing-gate battery that cycles every day, it is the number the replacement interval is planned on.

Does the AVR45-33 come with modules?

The cell is quoted on its own or with the Unigy II modules, connectors and base to make a configured system, the way our Spacesaver system pages are built around the AVR95 and AVR125 cells. Tell us the string voltage and the space available and a specialist quotes the arrangement, or the bare cells if you are replacing into existing modules.