Monday, 6 July 2026

To manage a 1000 MW utility-scale solar power plant, maintaining a highly structured inventory of critical spares, specialized testing tools, and safety gear is mandatory to prevent generation losses.

 To manage a 1000 MW utility-scale solar power plant, maintaining a highly structured inventory of critical spares, specialized testing tools, and safety gear is mandatory to prevent generation losses.

The comprehensive list below contains  essential spare parts and maintenance equipment items categorized by plant section, including specific industry makes, technical applications, and realistic prices in Indian Rupees (INR).




1. PV Modules, Trackers, & DC Spares (Items 1–40)
No. Item DescriptionIndustry Make/BrandApplication / UseApprox Price (INR)
1550Wp+ Monocrystalline Bifacial PV ModuleWaaree / Adani / JinkoReplacement for physical module damage₹9,500 / Pc
2MC4 Connectors (Male/Female)Staubli / AmphenolDC cable termination at string level₹140 / Pair
3Y-Branch DC ConnectorsStaubli / ElmexParalleling two strings together₹190 / Pc
4DC Fuse 15A (1500V DC)Bussmann / MersenOvercurrent protection inside SMBs₹350 / Pc
5DC Fuse 25A (1500V DC)Bussmann / LittelfuseHigh-current string protection₹380 / Pc
6Module Mounting Mid Clamps (Aluminium)Jakson / StandardSecuring inner panels to structures₹45 / Pc
7Module Mounting End Clamps (Aluminium)Jakson / StandardSecuring outer border panels₹50 / Pc
8Tracker Drive Motor (24V DC)Nextracker / ArctechDrives the horizontal torque tubes₹48,000 / Pc
9Tracker Controller Unit (TCU)Nextracker / ATIProcessing alignment and backtracking₹62,000 / Pc
10Slew Drive GearboxKinematics / BonfiglioliHigh torque rotation of tracking rows₹85,000 / Pc
11Tracker Inclinometer SensorTurck / BalluffReal-time monitoring of structure angle₹14,000 / Pc
12Smart String Monitoring Box (SMB) CardSwitchon / TrinityData aggregation of string currents₹22,000 / Pc
13DC Surge Protective Device (SPD) Type IIOBO Betterman / DehnVoltage spike protection in SMB₹4,500 / Pc
14DC Disconnector Switch (1500V, 250A)Santon / Kraus & NaimerIsolating individual SMB arrays₹18,000 / Pc
15Hexagonal Torque Tube CouplingNextracker / StandardJoining mechanical tracker beams₹3,200 / Pc
16Wind Anemometer SensorCampbell ScientificHigh wind safety triggers for tracker₹45,000 / Pc
17Pyranometer (Class A)Kipp & Zonen / HuksefluxMeasuring global horizontal irradiance₹2,20,000 / Pc
18Reference PV CellIMT Solar / NeslabReal-time tracking performance ratio₹35,000 / Pc
19Cable Ties (UV Resistant, Nylon 12)HellermannTytonSecuring string cables to structure₹850 / Pack of 100
20Stainless Steel SS316 Cable TiesBand-It / PanduitHeavy-duty DC main cable binding₹1,500 / Pack of 100
21Grounding Lug (Copper Alloy)Elmex / EricoStructural grounding of modules₹75 / Pc
22Earth Enhancement Material (25kg)Ashlok / MarconiteLowering resistivity of grounding pits₹650 / Bag
23Galvanized Grounding Rod (3 Meter)True Ground / JefDissipating fault currents into earth₹2,800 / Pc
24Flexible Braided Copper JumperElmex / StandardMaintaining continuity across joints₹180 / Pc
25DC Main Cable 1Cx400 sqmmPolycab / KeiSMB to Central Inverter transmission₹1,650 / Meter
26Solar String Cable 1Cx4 sqmmPolycab / HavellsInter-module string connections₹45 / Meter
27Solar String Cable 1Cx6 sqmmFinolex / KeiModule string to SMB runs₹62 / Meter
28Weatherproof Junction Box (IP67)Hensel / SpelsbergField terminations and wire loops₹3,500 / Pc
29Tracker Battery Backup PackNextracker / SaftEmergency stow power during outages₹16,000 / Pc
30Limit Switch for TrackerHoneywell / OmronPreventing over-rotation of structure₹2,400 / Pc
31Bearing Assembly for TrackerIgus / StandardSmooth rotation of torque tubes₹1,100 / Pc
32Purline Channel (Galvanized Steel)Pennar / Tata SteelMain module support purlines₹4,500 / Metric Ton
33Self-Drilling Screws (Epad)Buildex / WurthMounting hardware fixing₹8 / Pc
34Anti-Theft Fasteners (Nut & Bolt)EJOT / StandardPreventing module theft in open fields₹45 / Set
35Silicon Sealant Tube (Outdoor Grade)Dow CorningWeatherproofing junction boxes₹320 / Tube
36Cable Gland (IP68, M20 Nylon)Lapp India / ElmexSealing cable entries in SMBs₹65 / Pc
37Cable Gland (IP68, M40 Brass Nickel)Lapp India / DowellsSealing main DC cables in SMBs₹420 / Pc
38Heat Shrinkable Sleeve TubeRaychem / 3MInsulating spliced DC cables₹250 / Meter
39MC4 Crimping Pin (Male)StaubliSpare pin replacements for errors₹25 / Pc
40MC4 Crimping Pin (Female)StaubliSpare pin replacements for errors₹25 / Pc

2. Central & String Inverters Spares (Items 41–85)
No.Item DescriptionIndustry Make/BrandApplication / UseApprox Price (INR)
41IGBT Power Module (1500V)Infineon / Fuji ElectricCore switching element for DC to AC₹1,45,000 / Pc
42Inverter Main Control BoardSungrow / Huawei / FimerProcessing algorithmic synchronization₹2,80,000 / Pc
43Inverter Cooling Fan (High CFM)Ebmpapst / San AceThermal management of IGBT stacks₹38,000 / Pc
44DC Bus Capacitor (Film Type)TDK / Vishay / EpcosSmoothing DC ripple currents₹14,500 / Pc
45AC Fuse (690V/1000V, High Speed)Bussmann / SiemensOutput protection on AC side₹4,200 / Pc
46Gate Driver Circuit BoardInfineon / SemikronAmplifying firing pulses to IGBTs₹32,000 / Pc
47AC Contactor (3-Pole, 400A)ABB / SchneiderGrid isolation and pre-charging₹78,000 / Pc
48Power Supply Unit (PSU 24V DC)Mean Well / PhoenixInternal electronics low voltage rails₹6,500 / Pc
49Liquid Cooling Pump UnitSungrow / SinengCirculating coolant in outdoor stations₹92,000 / Pc
50Inverter Liquid Coolant (20 Litres)Glycoshell / ApprovedThermal liquid maintenance fluid₹12,500 / Can
51Air Filter Mat (Washable Grade)Rittal / StandardDust filtration for air intake vents₹850 / Pc
52DC Surge Arrester (Type I+II)Dehn / Phoenix ContactHigh energy lightning protection₹16,500 / Pc
53Fiber Optic Transceiver CardHirschmann / CiscoModbus/Ethernet SCADA reporting₹11,500 / Pc
54Hall Effect Current SensorLEM / TamuraMeasuring multi-string inputs₹8,500 / Pc
55AC Voltage TransducerPhoenix Contact / ABBGrid voltage monitoring inside panel₹14,000 / Pc
56HMI Touch Display ScreenPro-face / SiemensOn-site configuration and alarms₹45,000 / Pc
57Auxiliary Relay (24V DC Coils)Omron / FinderLogic tripping signals routing₹650 / Pc
58Pre-charge Resistor AssemblyVishay / OhmiteRestricting initial inrush currents₹9,500 / Pc
59DC Disconnect Motorized DriveABB / SantonAuto isolation from remote SCADA₹55,000 / Pc
60Ground Fault Detection RelayBender / LittelfuseMonitoring insulation degradation₹28,000 / Pc
61Ribbon Data Communication CableAmphenol / 3MConnecting control boards to drivers₹1,200 / Pc
62Temperature Sensor PT100Wika / DanfossMonitoring IGBT heatsink thermal run₹2,400 / Pc
63AC Breaker Release Coil (Shunt)ABB / SiemensTripping AC side under severe faults₹8,500 / Pc
64Microcontroller Boot ModuleHuawei / SungrowFirmware flashing recovery tool₹18,000 / Pc
65DC Busbar Copper ShuntStandard / Custominternal current pathway replacement₹4,500 / Pc
66Anti-Condensation HeaterRittal / ElmexPreventing moisture inside inverters₹2,200 / Pc
67Enclosure Door Gasket (Rubber)RittalWater ingress proofing of doors₹350 / Meter
68Varistor Board ModulesEpcos / EatonOvervoltage attenuation networks₹7,800 / Pc
69RC Snubber NetworkVishay / KeltronSuppressing transient high spikes₹3,400 / Pc
70String Inverter Wall Mount BracketHuaweiMechanical mounting swap-outs₹2,500 / Pc
71AC Terminal Block AssemblyPhoenix ContactMain outgoing AC cable terminations₹4,800 / Set
72MC4 Panel Feed-Through ConnectorStaubliSpare inputs on string inverters₹280 / Pc
73Current Transformer (CT) 1000/5AKappa / AEDynamic output current tracking₹3,800 / Pc
74Voltage Transformer (PT) 0.66/0.11kVKappaLow voltage side sensing inputs₹14,500 / Pc
75Auxiliary Fuse HolderBussmann / SchneiderProtecting sub-circuit control lines₹350 / Pc
76Emergency Stop Mushroom ButtonSiemens / SchneiderHardwired trip on safety panel front₹850 / Pc
77LED Indicator Light (Red/Green/Amber)Schneider ElectricLocal panel state diagnostics₹180 / Pc
78RS485 Communication CardMoxa / WaveshareInterfacing string lines to data logger₹4,500 / Pc
79Modbus Master Data LoggerHuawei / SungrowField data consolidation point₹85,000 / Pc
80Fiber Splice Cassette TrayRaychem / D-LinkOrganising plant-wide FO lines₹1,200 / Pc
81DC Busbar Insulation BootRaychemPreventing short circuits at joints₹650 / Pc
82Internal AC MCB 16A (Three Phase)Siemens / LegrandAuxiliary cooling circuit power trip₹1,800 / Pc
83Ethernet Patch Cord (Shielded Cat6)Molex / PanduitElectromagnetic noise resistant data₹350 / Pc
84Liquid Pressure GaugeWikaChecking coolant loop operation₹3,200 / Pc
85Thermostat Control SwitchRittalTriggering cooling fans autonomously₹1,400 / Pc

3. Transformers & Inverter Duty Substations (Items 86–125)
No.Item DescriptionIndustry Make/BrandApplication / UseApprox Price (INR)
86Transformer Bushing (33kV, HV)CJI / BHELInsulating high voltage exit lines₹45,000 / Pc
87Transformer Bushing (LV Side)CJILow voltage incoming connections₹18,000 / Pc
88Magnetic Oil Level Gauge (MOG)Sukrut / WikaTracking insulation oil expansions₹14,500 / Pc
89Buchholz Relay (Double Float)Sukrut / CTRTrapping internal gas accumulation faults₹24,000 / Pc
90Oil Temperature Indicator (OTI)Wika / PrecitechMonitoring transformer thermal limits₹18,500 / Pc
91Winding Temperature Indicator (WTI)Wika / PrecitechReal-time copper core temperature₹21,000 / Pc
92Dehydrating Silica Gel BreatherSukrut / CTRMoisture removal during air inhalation₹6,500 / Pc
93Cobalt-Free Blue/Orange Silica GelStandardMoisture absorption material refill₹220 / Kg
94Pressure Relief Device (PRD)Sukrut / CTROverpressure venting during arcs₹28,000 / Pc
95Transformer Insulation Oil (EHV Grade)Savita / AparDi-electric medium & core cooling₹85 / Litre
96Marshalling Box Enclosure (IP65)Rittal / StandardConsolidating alarm contacts (OTI/WTI)₹35,000 / Pc
97Off-Circuit Tap Changer Handle AssemblyCTR / EasunManual voltage matching mechanics₹45,000 / Set
98On-Load Tap Changer (OLTC) Drive MotorCTRAutomation step tracking on Grid Main₹2,40,000 / Pc
99Nitrile Rubber Gasket Sheet (RC-70)StandardLeak sealing across tank flanges₹1,200 / Meter
100Bi-Metallic Connector Lug (Al-Cu)Dowells / LinkwellInterfacing copper bars to alum lines₹850 / Pc
101Neutral Grounding Resistor (NGR)National / ResitechLimiting earth fault return impacts₹1,85,000 / Pc
102Surge Arrester (30kV, Station Class)Elpro / OblumHigh voltage lightning protection₹34,000 / Pc
103Arching Horn Gap BracketsStandardSecondary discharge flash pathways₹1,500 / Set
104Nitrogen Injection Fire Protection KitCTR / MinimaxFast oil fire quenching system₹12,50,000 / System
105Oil Sampling Valve (Brass)WikaTapping oil samples for DGA test₹1,800 / Pc
106Air Release PlugStandardRemoving air locks after oil filtration₹450 / Pc
107Radiator Valve (Butterfly Type)CTR / StandardIsolating individual cooling fins₹8,500 / Pc
108Oil Circulating Pump (For forced cool)Elgi / CromptonDriving rapid heat dissipation₹65,000 / Pc
109Explosion Vent Diaphragm SheetStandardRupture backup disk for old tanks₹3,500 / Pc
110Flexible Copper Laminate ShuntDowellsAbsorbing mechanical vibrations₹4,200 / Pc
111Automatic Voltage Regulator (AVR)CTR / A-EberleKeeping grid voltages constant₹1,15,000 / Pc
112Remote Tap Changer Indicator (RTCC)CTRDisplaying manual tap layout in CR₹32,000 / Pc
113CT for Differential ProtectionKappa / PragatiDetecting internal transformer shorts₹14,000 / Pc
114Core Grounding Bushing StrapStandardIsolating core frame grounding for tests₹2,200 / Pc
115Gas Collector Bottle AssemblySukrutTrapping gas samples from Buchholz₹8,500 / Pc
116Inter-deck Insulating PressboardWoodward / RamanReplacing dry coil separator layers₹4,500 / Sheet
117Earth Pit Testing Link BoxElmexOpening loops for resistivity tests₹1,400 / Pc
118Terminal Block (Spring Loaded, HV)Phoenix ContactSafe sensory secondary wiring loops₹240 / Pc
119Door Lock Mechanism for Compact SubRittalSecurity sealing on remote fields₹2,800 / Pc
120Anti-Vibration Pads (Neoprene Base)DunlopDamping foundation hum noise₹3,500 / Block
121Conservator Tank Sight GlassSukrutVisual estimation of fluid levels₹1,800 / Pc
122Auxiliary Control MCB (2-Pole, 6A)SiemensOTI/WTI circuit trip safeguard₹650 / Pc
123Hexagonal Brass Bolt Set (M16 Grade)UnbrakoHigh torque electrical bonding₹120 / Set
124Transformer Radiator Cleaning BrushStandardClearing bird nests/debris from fins₹450 / Pc
125Oil Spill Containment Kit Pad3MSoaking oil leaks during valve swaps₹8,500 / Box

4. HT/LT Switchgear & Substation Control Panels (Items 126–170)
No.Item DescriptionIndustry Make/BrandApplication / UseApprox Price (INR)
126Vacuum Circuit Breaker (33kV VCB)ABB / Siemens / SchneiderField feeder switching and protection₹4,80,000 / Pc
127VCB Spring Charging Motor (220V DC)ABB / SiemensAuto mechanism loading for fast reclose₹24,000 / Pc
128VCB Shunt Trip Coil (220V DC)Schneider / SiemensDisengaging breaker via safety relay₹6,500 / Pc
129VCB Closing Coil (220V DC)Schneider / ABBRemotely engaging the vacuum poles₹6,500 / Pc
130Numerical Protection Relay (Feeder)ABB (REF615) / SiemensComprehensive overcurrent & earth fault₹1,65,000 / Pc
131Numerical Protection Relay (Distance)Alstom (Micom) / SELTransmission line fault identification₹3,40,000 / Pc
132Master Trip Relay (High Speed 86)Schneider / ABBLatching critical faults permanently₹12,500 / Pc
133Trip Circuit Supervision Relay (95)ABB / OmronVerifying continuity of trip firing coils₹9,500 / Pc
134Multifunction Energy Meter (Class 0.2S)Secure Meters / L&TSubstation precision billing check₹24,000 / Pc
135SF6 Gas Density Monitor GaugeWikaChecking insulating gas mass in GIS₹42,000 / Pc
136Air Circuit Breaker (LT ACB 2000A)L&T / Siemens / C&SMain auxiliary switchboard protection₹1,85,000 / Pc
137Busbar Support Insulator (33kV Epoxy)Elmex / AlliedHolding heavy copper link weights₹4,500 / Pc
138Current Transformer (33kV Out Ref)Pragati / KappaMetering current lines to grid station₹45,000 / Pc
139Potential Transformer (33kV Line)Pragati / KappaGrid sync monitoring inputs₹52,000 / Pc
140Substation Battery Charger ModuleExide / HBLContinuous supply to protection relays₹1,95,000 / System
141Valve Regulated Lead Acid Battery (2V)Exide / HBL220V DC substation backup cell unit₹8,500 / Cell
142Annunciator Panel (16 Windows)Minilec / TrinityVisual and audible fault diagnostic alerts₹18,000 / Pc
143Under Voltage Release CoilSiemens / L&TAutomatic drop off during line dead states₹7,200 / Pc
144Auxiliary Contacts Block (VCB Side)ABBRelaying physical state back to SCADA₹2,400 / Pc
145Arc Flash Protection Sensor (Optical)Arcteq / SchneiderLight sensor trip for internal panels₹16,000 / Pc
146Space Heater (100W with Thermostat)ElmexHumidity control in HT panels₹1,800 / Pc
147Panel Exhaust Fan (Heavy Duty Industrial)EbmpapstForced ventilation of control lineups₹6,800 / Pc
148Molded Case Circuit Breaker (MCCB 250A)L&T / LegrandSecondary distribution panel safety₹18,500 / Pc
149Miniature Circuit Breaker (MCB 16A DC)Schneider / SiemensProtecting DC auxiliary loops₹950 / Pc
150Time Delay Relay (Electronic)Multi-Span / OmronSequential logic timing routines₹1,800 / Pc
151Test Terminal Block (TTB)Secure Meters / ElmexInjecting currents without cutting wires₹4,500 / Pc
152Phase Indicating Lamps LED (RYB)Teknic / SchneiderVisual grid connectivity tracking₹180 / Pc
153Selector Switch (Local/Remote)Salzer / Kraus & NaimerSelecting command source control₹850 / Pc
154Control Transformer (415V/110V AC)Kappa / AEStepdown for internal panel lighting₹8,500 / Pc
155Isolator Blade Kit (33kV, Manual)Switchgears IndiaPhysical disconnect air gap verification₹65,000 / Set
156Earth Switch Interlock IntersectSiemensPreventing closure on live lines₹14,000 / Pc
157Earth Braid Strap (Tinned Copper)DowellsMain frame door structure grounding₹380 / Pc
158Limit Switch for VCB TruckABBSensing if VCB is "Test" or "Service"₹1,800 / Pc
159Copper Busbar Joint FishplateStandardJoining multi-panel main lines₹1,500 / Pc
160Shunt Resistor (100A, 75mV)AEAccurate DC current loop measurement₹2,100 / Pc
161SCADA Gateway ControllerCisco / MoxaMain protocol conversion hub₹1,45,000 / Pc
162Managed Ethernet Switch (24 Port)Hirschmann / CiscoData routing across plant networks₹85,000 / Pc
163Fiber Optic Patch Panel (LIU 24 Port)D-Link / DigisolFiber backbone termination point₹6,500 / Pc
164SCADA Server Workstation HMI ComputerDell Industrial / HPPlant operating display console₹1,20,000 / Pc
165Uninterrupted Power Supply (UPS 5kVA)APC / EmersonControl room computer backup power₹95,000 / Pc
166Modbus TCP/RTU Converter SerialMoxaInterfacing legacy meters to Ethernet₹18,500 / Pc
167RS485 Surge Protection ModulePhoenix ContactSafeguarding data lines from surges₹4,200 / Pc
168Digital Input Card (RTU Panel)ABB / SiemensMapping field alarms into SCADA₹24,000 / Pc
169Digital Output Card (RTU Panel)ABB / SiemensExecuting breaker trips via SCADA₹28,000 / Pc
170Power Quality Analyzer MeterYokogawa / FlukeMonitoring harmonic grid distortion₹2,60,000 / Pc

5. Cables, Jointing Kits, & Overhead Transmission Line Spares (Items 171–205)
No.Item DescriptionIndustry Make/BrandApplication / UseApprox Price (INR)
17133kV XLPE Armoured Cable (3Cx300)Polycab / KEI / FinolexMain power delivery from pooling points₹4,800 / Meter
17233kV Straight Jointing Kit (Heat Shrink)Raychem (3M)Repairing cut or damaged HT lines₹18,500 / Kit
17333kV Outdoor Termination KitRaychem (3M)Interfacing underground cable to poles₹22,000 / Kit
17433kV Indoor Termination KitRaychem (3M)Terminating HT lines inside VCB panel₹14,500 / Kit
175AC Control Cable (10C x 2.5 sqmm)Havells / PolycabWiring relay commands across yards₹280 / Meter
176Fiber Optic Cable (24 Core Single Mode)Sterlite / FinolexLong distance plant-wide data runs₹110 / Meter
177AC Auxiliary Cable (3.5C x 120 sqmm)Kei / PolycabMain auxiliary power station loops₹1,150 / Meter
178Panther ACSR ConductorCable Corporation IndiaOverhead line medium spans₹1,65,000 / Km
17933kV Pin Insulator (Polymer Type)Aditya Birla / DennisHolding overhead wire lines on poles₹1,400 / Pc
18033kV Disc Insulator (Polymer Type)Aditya Birla / DennisDead-end tensioning anchor tracks₹2,800 / Pc
181Suspension Clamp AssemblyStandardHanging transmission lines on intermediate poles₹1,100 / Set
182Tension Clamp AssemblyStandardSecuring lines at termination corners₹1,850 / Set
183PG Clamp for Panther ConductorStandardParallel groove jump line taps₹450 / Pc
184Vibration Damper for ConductorStandardEliminating wind oscillation cracks₹2,200 / Pc
185Earthing Roller AssemblyStandardGrounding lines during overhead work₹6,500 / Pc
186Cable Cleat (Trefoil Clamps Al)DowellsSecuring single-core high power lines₹380 / Pc
187Cable Trays (Perforated GI, 300mm)Godrej / IndianaNeat routing of routing inside trenches₹650 / Meter
188Cable Tray Coupler PlateStandardStructurally joining cable tray lines₹45 / Pc
189Heavy-Duty Copper Lug (300 sqmm)DowellsTerminating large power conductors₹650 / Pc
190Aluminium Crimp Lug (400 sqmm)DowellsTerminating large main DC runs₹280 / Pc
191Cable Warning Tape (Red - "HT Cable")StandardUnderground indicator layer for excavators₹8 / Meter
192GI Earthing Strip (50x6 mm)Tata / JSWMain loop connectivity across sub yards₹220 / Meter
193Danger Sign Boards (33,000 Volts)Standard EnamelLegal safety marker attachments₹180 / Pc
194Fire Stop Mortar Compound3M / HiltiSealing panel baseline cable entries₹2,400 / Bag
195Fire Retardant Cable Coating Paint3M / VerminexFlame proofing cable trenches₹650 / Kg
196Corrugated Flexible Conduit (25mm)BEC / PrecisionRoute safeguarding sensor tracking lines₹35 / Meter
197Conduit Gland FittingsStandardTerminating flexible conduits safely₹45 / Pc
198Grounding Mat Mesh Cross JointsStandardExothermic weld moulds for grounding yards₹450 / Joint
199Bird Flight DiverterStandardVisual attachments on overhead lines₹1,800 / Pc
200Preformed Line Splice MeshStandardRepairing snapped overhead strands₹2,400 / Set
201Cable Roller (Straight Line Trench)StandardFacilitating heavy cable pulling setups₹3,200 / Pc
202Cable Pulling Lubricant (Gel)3MMinimizing jacket friction in conduits₹1,400 / Can
203End Sealing Cap (Heat Shrinkable)RaychemMoisture capping cut cable inventory₹350 / Pc
204Nylon Cable Tie Mounting CradleStandardScrew anchors for control wire layouts₹5 / Pc
205Vinyl Insulation Tape (Black/Red/Blue)3M ScotchPhase identification color tracks₹45 / Roll

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