Electrical arrangements at Matri Bhaban. You can see the earthing strip on the wall. The square
box with handles at the back is the 3 kVA isolation transformer. The 2 kVA true double-conversion
online UPS is the small black box on the right. The battery bank is large, with twelve 26AH
batteries (72Vx2 banks in parallel) for roughly two hours backup at full load. Our expected load
is about half this capacity, ~ 900 W.