Understand your solar before you buy your solar.

Plan, buy and install rooftop solar in India: a 10-step plan from your first bill to a commissioned, documented, warrantied system.

From your bill to your system size: the four-limit method, terrace layout and row spacing, inverter matching, string voltage checks and loss budgets, with worked Indian examples.

Net metering, net billing, net feed-in and gross metering: what your exported units are worth in your state, how to read a net-metered bill, and how the rules should shape your system size.

Read the BOM, check the scope, normalise the price, score three quotes fairly and sign a contract that protects you, with a ready-to-use comparison sheet.

BIS, ALMM and scheme compliance, the seven numbers that matter in Indian heat, warranties decoded, and a fair way to compare panels.

String, micro, optimiser or hybrid: sizing, MPPTs and voltage windows, efficiency, protection, placement and service for Indian homes and businesses.

Lead-acid vs lithium, usable kWh, DoD, cycle life and C-rate: whether you need a battery, how to size it for named loads, and its real cost per stored unit.

What to collect at handover (invoices, serial numbers, test reports, DISCOM papers and warranties) and how to keep them working for you for 25 years.

Product, performance, inverter, battery and workmanship warranties, plus home insurance for solar in India, and how to make a claim that succeeds.

Common-area solar, roof sharing, group and virtual net metering, the 2024 rules for multi-storey buildings, and a members’ proposal for your general body.

Solar for farms, pumps and farm income: six options explained simply, PM-KUSUM and its current status, diesel vs solar, and how to stay safe from fake schemes.

Head, flow and pump type: measure your borewell, read the official water-output table, and choose the right HP and panels for your fields.

Growing crops under solar: designs, light and water effects, land equivalent ratio, policy status and the questions to ask before committing land.

Cash, bank loans, vendor finance and RESCO: EMI maths, hidden costs, subsidy timing and the simple test that tells you whether a loan pays for itself.

The owner’s manual: how dust steals your units in India, how to clean safely, what to check monthly and what a technician must test every year.

Monitoring, specific yield, performance ratio and CUF: set expected values, read seasonal patterns, and catch faults while they are small.

Owner checks vs technician work: decision trees for no output, low output, tripping and error codes, emergency signs, and a fault report that gets problems fixed in one visit.

The complete rooftop connection procedure: sequence, national timelines, technical requirements, documents and an approval tracker that prevents delays.

Load matching, commercial tariffs and demand charges, CAPEX vs RESCO, accelerated depreciation and a worked 30 kWp business case.

CAPEX, RESCO and donor models, vacation-aware contracts, procurement steps and using solar as a teaching tool.

Corrosion classes, marine-grade materials, salt-mist and PID tests, cyclones, floods, desert heat and hill cold: how to build systems that last.

Roof types, loads, India’s wind zones, materials and corrosion protection, anchoring vs ballast, and keeping roofs leak-free.