We had availed the services of “NANTECH POWER SYSTEMS PVT LTD” and their service was excellent. Their rates were competitive when compared to others. They have discharged their services in professional manner. We appreciate the timely delivery (at a time, convenient to us) of the battery for the UPS at a very competitive rate. More importantly, the installation was carried out in a professional manner, smoothly & to our great satisfaction. We would highly recommend “NANTECH POWER SYSTEMS PVT LTD” to all our friends.