Proper earthing (grounding) is critical for claiming inverter warranties. Solar inverters contain sensitive electronic components, power transistors (IGBTs), and surge protection devices (SPDs) designed to divert electrical surges, lightning strikes, and leakage currents safely to the ground.
If a solar plant lacks dedicated, low-resistance earthing (typically below 5 Ohms), residual leakage voltage or transient surges can damage the inverter’s internal circuitry. Most inverter manufacturers (such as Sungrow, Growatt, SMA, Solis, Fronius) explicitly state in their warranty terms that component failures caused by improper grounding, floating neutral voltages, or ungrounded AC/DC surge protection will void the product warranty. Ensuring separate AC, DC, and Lightning Arrestor earthing pits with tested resistance guarantees warranty compliance and equipment longevity.
The tilt angle of solar modules determines the amount of solar irradiance captured throughout the year and ensures natural cleaning (dust washing during rainfall).
If solar panels are installed completely flat (0 degrees), rainwater and dust accumulate on the glass frame, creating localized hotspot shadows, reduced power output, and cell degradation over time. Conversely, an optimal tilt angle optimizes the sun’s angle of incidence, maximizing annual kilowatt-hour (kWh) generation and enabling rainwater to naturally wash away dust and debris.
The ideal tilt angle for a fixed-tilt rooftop solar PV system is generally equal to the geographical latitude of the installation location (e.g., approximately 26° to 28° in Northern India / Delhi-NCR).
In practice, a tilt angle between 10° to 15° facing true South is widely adopted for rooftop installations in India to minimize wind load resistance, optimize structural space, reduce shadow inter-row spacing, and maintain effective rainwater self-cleaning without requiring excessive structural mounting heights.
For a safe and standard grid-tied rooftop solar power installation, a minimum of 3 independent Earthing Pits (or dedicated earthing grids) must be performed:
- DC Earthing Pit: Connected to the solar PV panel frames, Module Mounting Structures (MMS), and DC Distribution Boxes (DCDB).
- AC Earthing Pit: Connected to the solar inverter’s AC ground terminal, AC Distribution Box (ACDB), and main distribution panel.
- LA (Lightning Arrestor) Earthing Pit: Dedicated exclusively to the Lightning Arrestor terminal to safely dissipate atmospheric lightning strikes without inducing high surge voltages into the plant’s electrical equipment.
We recommend and install Tier-1, ALMM-approved (Approved List of Models and Manufacturers) High-Efficiency Mono-PERC and TOPCon Bifacial Solar Modules from leading global and national manufacturers, including:
- Waaree Energies
- Adani Solar
- Vikram Solar
- Tata Power Solar
- Goldi Solar
- Jinko Solar / Canadian Solar / Trina Solar
For high reliability, peak efficiency (98%+), and robust cloud monitoring, we utilize Tier-1 Grid-Tied Solar Inverters certified under BIS & IEC standards from leading global brands, including:
- Sungrow
- Growatt
- Solis (Ginlong)
- Huawei
- Fronius
- SMA Technologies
- Havells / Polycab
Solar installations utilize heavy-duty, XLPO-insulated cross-linked halogen-free UV-resistant DC cables (specifically designed for 1500V DC outdoor exposure) and armored copper/aluminum AC cables from top-tier certified manufacturers, including:
- Polycab India
- Havells India
- Finolex Cables
- RR Kabel
- KEI Industries
Module Mounting Structures (MMS) are fabricated using high-tensile, corrosion-resistant metals engineered to withstand wind speeds up to 150-170 km/h:
- Hot-Dip Galvanized Iron (HDGI): Coated with a minimum zinc layer of 80-120 microns for superior 25+ year rust resistance.
- PosMAC / Galvalume (Zinc-Aluminum-Magnesium Coated Steel): Ultra-durable pre-galvanized high-strength steel.
- Anodized Aluminum Alloy: Lightweight and highly corrosion-resistant, ideal for elevated residential rooftop superstructures and metal sheet roofs.
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