2V 150Ah SMF VRLA Gel Battery for Solar/Wind/UPS Systems - Factory Direct Supply

You've got a 48-battery bank feeding a telecom tower in a remote area, and what you need is something that won't gas out or need water top-ups every few months — that's exactly where this gel battery fits, with its fixed silica electrolyte that keeps everything stable even when teh ambient temp hits 45°C or so.

The 150Ah capacty at the 10-hour rate is what most buyers look at first, but it's actually the self-discharge rate of under 3% per month that saves them headaches on seasonal solar installations where the system sits idle for weeks.

And grid alloy they use here is a corrosion-resistant lead mix that's better than standard antimony alloys for deep cycling, though you'll still want to avoid taking it below 1.75V per cell regularly if you want to see that 15-year design life.

We usually stock these with the T4 terminal bolts (M8x18) already torqued, but if you're stacking them in a 2V configuration for a 48V bank, you'll need busbars at least 200A continuous — the case is ABS plastic, so it handles the weight fine at 8.2kg each, but the dimensoins (171x102x206mm) mean you can fit 24 of them in a standard 19-inch rack with some creative spacing.

One thing buyers don't always ask about upfront is the operating temperture range of -20°C to +50°C — basically, if you're putting these in an unventilated utility shed in Arizona, they'll still hold up, but the cycle life drops by about half above 40°C, so it's not ideal for continuous high-heat appliction like direct-sun rooftop arrays without ventilation.