Inverter and Battery Installation

Details

Installation labour for one inverter and battery: siting them, assembling the trolley, cleaning and greasing the terminals, running the DC cable, fitting an in-line DC fuse, taking the output to its own MCB in your existing board, checking the load on the backed-up circuits, starting the first charge, and reading and writing down the electrolyte level and the float voltage. The number worth arguing about is the DC cable. A 900 VA inverter on a 12 V battery draws roughly 75 A at the battery at full load, and closer to 90 A once conversion losses are counted. The cable that comes in most boxes is not sized for that, and an undersized DC lead on a permanently connected battery is a heating problem that nobody sees until it is a burning one. We fit at least 16 sq mm copper on a 12 V single-battery system and keep the run under 1.5 metres, and if that means a longer cable than the one in the carton, you get the longer cable. The second thing to know is that an inverter does not need a special earthing kit sold at your door. It needs the house earth to actually work. We will test the earth and give you the reading, and if it is bad we will tell you what a real earth pit costs instead of selling you a gadget. A flooded tubular battery vents hydrogen while charging, so it goes somewhere ventilated and never in a closed cupboard or a bedroom.

• At least 16 sq mm copper on the DC side, run kept under 1.5 m, with an in-line DC fuse
• Output taken to its own MCB in the existing board, not spliced into a socket
• Load on the backed-up circuits checked against the inverter rating and written down
• Electrolyte level and float voltage read and recorded at handover
• Not included: the inverter at Rs 4,500 to Rs 7,500 typical, the battery at Rs 12,000 to Rs 17,000 for a 150 Ah tubular, separate wiring of backed-up points at Rs 450 to Rs 900 each, a stabiliser, and earth pit work at Rs 3,500 to Rs 6,500
• Parts are charged at the printed MRP on the box and never above it, the box and the bill are left with you, and there is no handling charge on top. You may also buy the part yourself and we will fit it, and the labour price does not change.
• 12 months on the installation, the cable and the terminations. The inverter and battery carry their own warranties and the bills are handed to you
• What is missing from this page is deliberate: no arrival window, no crew size, no turnaround promise. Those come from a roster that is still being built, and printing them early is how this trade starts lying.