Measures DC open-circuit voltage, AC output voltage, current, and continuity. The most-used instrument on any solar site.

• CAT III 600 V or CAT IV 300 V minimum
• True RMS for AC measurements
• DC range ≥ 1 000 V for utility strings
• Auto-ranging preferred

Non-invasive AC/DC current measurement by clamping around a conductor — essential for verifying string and inverter output without breaking circuits.

• DC current range ≥ 10 A
• AC range ≥ 60 A for inverter output
• CAT III 600 V rating
• DC-capable Hall-effect jaw

Applies 500 V or 1 000 V DC to verify cable insulation integrity before energising any PV string or AC circuit.

• Test voltages: 500 V DC (LV) / 1 000 V DC (PV strings)
• IR reading ≥ 1 MΩ/km expected
• Polarisation index function useful
• CAT IV rated

Measures plane-of-array (POA) irradiance in W/m² and module temperature — the two inputs needed to calculate performance ratio at commissioning.

• POA irradiance ± 3 % accuracy
• Module temperature probe (Pt100 or thermocouple)
• Data logging via USB or Bluetooth
• Secondary-standard class minimum

Sweeps voltage across a PV string and plots the I-V curve, revealing Voc, Isc, Pmax, fill factor and shading/mismatch faults.

• Voltage range ≥ 1 000 V DC
• Current range ≥ 30 A
• STC correction algorithm
• Irradiance + temp sensor included

Measures soil resistivity and electrode-to-earth resistance to verify the earthing system meets design and regulatory values.

• 3-electrode and 4-electrode (Wenner) methods
• Range 0.01 Ω – 200 kΩ
• AC test frequency to avoid electrolytic error
• Stakeless clamp variant for live systems

Detects hotspots in PV modules, bypass diodes, connectors and busbars by imaging surface temperature gradients — required in IEC commissioning reports.

• Resolution ≥ 160×120 px (320×240 recommended)
• Thermal sensitivity ≤ 0.1 °C (NETD)
• Fixed emissivity 0.95 for silicon modules
• Minimum ΔT threshold: 10 °C above ambient

Ensures fasteners are tightened to manufacturer specifications — critical for MC4 connector locking rings (2.5–4.0 Nm) and structural mounting bolts.

• Range 2–25 Nm for DC connectors
• Range 20–200 Nm for structural work
• Click-type recommended for field use
• Calibrate annually

Correctly crimps the metal contact inside MC4 PV connector bodies. Mis-crimped contacts create resistance heating and fire risk.

• Brand-matched tool mandatory (Stäubli, Amphenol, etc.)
• For 4 mm² and 6 mm² solar cable
• Ratchet mechanism prevents under-crimp
• Verify with go/no-go gauge

Removes the outer sheath and insulation from 4 mm² and 6 mm² solar DC cable without nicking copper conductors — nicks create hotspots.

• Calibrated strip length for MC4 contacts
• Compatible with 4 mm² and 6 mm²
• Wire gauge stop preferred

Clean, burr-free cuts on solar DC cable and AC power cable. Ratchet action reduces hand fatigue on thick multi-core cables.

• Capacity ≥ 35 mm² for AC trunk cables
• Hardened blade to prevent conductor distortion
• Insulated handles recommended

Crimps copper ring lugs and bootlace ferrules onto AC conductors for inverter terminals, AC distribution boards and MMS connections.

• Die set: 6–240 mm² for power lugs
• Bootlace ferrule set: 0.5–16 mm²
• Hexagonal die profile for IEC lugs
• Hydraulic model for ≥ 95 mm²

Bends rigid PVC or EMT conduit for AC wiring runs between inverters, distribution boards and the grid connection point.

• Available for 20 mm / 25 mm / 32 mm conduit
• Angle markings: 15°, 30°, 45°, 60°, 90°
• Stub-up chart printed on handle

Drills pilot holes for mounting feet, cable conduit penetrations and masonry anchors for wall-mounted equipment.

• SDS+ rotary hammer for masonry anchors
• Diamond or carbide hole saw for GI sheet / tile
• Torque clutch to protect fixings

Verifies Voc and polarity of each string in the combiner box before the DC isolator is closed — prevents reverse-polarity faults reaching the inverter.

• Voltage range ≥ 1 000 V DC
• Polarity indicator (LED)
• Low-cost first check before full I-V trace

Measures voltage/current THD, power factor, harmonics and frequency at the grid connection point — required for DISCOM interconnection reports.

• Class A per IEC 61000-4-30
• Waveform capture 256 samples/cycle
• Flicker, sag/swell and transient recording
• Three-phase + neutral measurement

Logs irradiance, ambient temperature, module temperature and AC power simultaneously for the performance ratio (PR) report.

• 4–8 analogue input channels
• Pulse + RS-485 Modbus inputs
• SD card + 4G / Wi-Fi upload
• ± 0.1 % analogue accuracy

Connects to the inverter via RS-485, USB or Wi-Fi to configure grid code parameters, CT ratio, export limits and remote monitoring credentials.

• USB-to-RS485 converter included
• Inverter OEM software (Sungrow, Fronius, ABB, etc.)
• IEC 61727 grid parameters pre-loaded
• String-level monitoring setup (SolarEdge, Huawei)

Mandatory for any rooftop work above 2 m. Distributes arrest forces across the torso and thighs to prevent spinal injury.

• Full-body type (chest + leg loops)
• Dorsal D-ring for lanyard attachment
• Rated to 140 kg arrest load
• Shock-absorbing lanyard required (max 1.75 m)

Protects against arc flash burns when operating AC switchgear, inverter terminals or MMS panels — required above 1 000 V AC.

• ATPV ≥ 8 cal/cm² (HRC 2 minimum)
• Arc-rated shirt, trousers and balaclava
• Arc flash face shield + hard hat
• Leather over-gloves over rubber insulating gloves

Electrically insulated gloves rated to 1 000 V AC / 1 500 V DC — primary hand protection when working on live DC or closing AC breakers.

• Class 00: up to 500 V AC
• Class 0: up to 1 000 V AC / 1 500 V DC
• Leather over-gloves protect rubber from cuts
• Replace if test date > 6 months

Detects AC and DC voltage without contact — the first check before touching any conductor or exposed terminal.

• AC range: 50–1 000 V
• DC range: 120–1 500 V (solar-specific models)
• Audible + visual alert
• CAT III 1 000 V / CAT IV 600 V rating

Protects against falling objects during structure installation and accidental head impacts against module frames.

• Class B (dielectric, 20 kV) for electrical work
• Chin strap retention system
• Ventilated shell for Indian summer conditions
• Replace after any impact or after 3 years

Steel-toe or composite-toe boots with anti-puncture midsole — protect against dropped tools, module frames and roof penetrations.

• Steel toe cap: ≥ 200 J impact
• Anti-puncture midsole: ≥ 1 100 N
• Anti-static dissipative sole preferred
• Ankle support for roof and ladder work