comprehensive annual maintenance contract of engine alternator comprehensive annual maintenance contract of engine alternators of various make having capacity of 5kva to 40 kva in chikmangalore ssa , annual maintenance of engine alternators [ includes spares required to be replaced by the same make and replacement and refiling of oil ] at different t / e / mobile tower sites in chikkamagalur ssa , amc charges for 5 to 7 . 5 kva engine alternator per unit per year , amc charges for 10 to 15 kva engine alternator per unit per year , amc charges for 20 to 25 kva engine alternator per unit per year , amc charges for 30 to 35 kva engine alternator per unit per year , amc charges for 40 kva engine alternator per unit per year