Comfort Insta-power Ltd. Supplies Online UPS with Capacity of 1 to 500 KVA. Comfort Insta-power Ltd. Is the manufacturer of Distribution Transformer, Furnace, Lighting, Isolation transformers and Electronics controlled Servo Voltage Stabilizers. Online UPS with Capacity of 1 to 500 KVA comes with standard SMF batteries having 30 minutes battery back-up.