SolarDraft blog
Solar guides for Indian EPCs. Clear and practical.
Design, proposals, subsidies and running a solar business — explained in depth, with tables, worked examples and FAQs.
34 guides
Best Solar Panel Tilt Angle and Direction in India (City-wise)
Which way should panels face, and at what angle? A city-wise tilt table plus the practical trade-offs on Indian rooftops.
Solar Single Line Diagram (SLD) Explained, Component by Component
What a solar SLD shows, how to read one from panels to net meter, and the mistakes that hold up DISCOM approval.
How Many Units Does a 1 kW Solar System Generate in India?
The 4-units-a-day rule explained: generation by system size, region and season, and how to check your own system.
SolarDraft vs PVsyst: 3D Proposal Tool or Engineering Simulation Software?
SolarDraft vs PVsyst — a sales/proposal/CRM platform versus an engineering simulation tool.
SolarDraft vs Solar Ladder: Which Solar EPC Tool Fits Your Team?
SolarDraft vs Solar Ladder — CRM, proposals, project tracking and pricing transparency compared.
SolarDraft vs Reslink Energy: Comparing Indian Solar EPC Platforms
SolarDraft vs Reslink Energy — project scale, design, CRM and pricing transparency compared.
SolarDraft vs Arka360: Which Solar Design Software Fits Indian EPCs?
SolarDraft vs Arka360 — market focus, design features, subsidy handling and pricing compared.
3D Design vs Guesswork: Why Proposals Need Real Data
Manual estimates lose deals. Here's why a 3D rooftop model closes them faster.
PM Surya Ghar Yojana: A Quick Subsidy Guide
What the scheme covers, who qualifies, and how a clean proposal gets it approved faster.
Solar Proposal Software: What to Look for Before You Buy
Not all proposal tools are equal — here's what actually moves the needle.
Rooftop Shading: The Silent Killer of Solar Output
Even a small shadow can cut a panel string's output by half. Here's what causes it.
India's Renewable Energy Targets and What They Mean for Solar EPCs
The national targets driving rooftop solar demand over the next few years.
How to Choose the Right EPC Contractor (Homeowner's Guide)
Five questions worth asking before you sign with any solar installer.
How Many Solar Panels Does Your Roof Actually Need?
A quick rule of thumb for sizing a rooftop system — and the factors that really decide the number.
Solar Panel Degradation: What to Expect Over 25 Years
Output drops slowly and predictably — here's the actual curve.
Ground-Mounted vs Rooftop Solar: Which Fits Your Project?
When roof space runs out, ground-mounted systems change the math.
Solar CRM: Why EPCs Need One to Scale
Past a handful of leads a month, spreadsheets quietly start losing you deals.
Why Solar Proposals Get Rejected (and How to Fix Them)
The recurring reasons customers walk away from a solar quote.
DISCOM Approval Process for Rooftop Solar — Step by Step
The paperwork between "system installed" and "meter running" — explained simply.
Solar Panel Warranty: What's Actually Covered?
Two warranties, not one — and most customers only know about half of it.
Battery Storage 101: Do You Need One With Solar?
Batteries add cost and complexity — here's when they're actually worth it.
Commercial vs Residential Solar: Key Differences for EPCs
Same panels, very different projects — here's what changes.
Solar Financing Options for Indian Homeowners
How customers actually pay for rooftop solar — beyond upfront cash.
Common Mistakes New Solar EPCs Make (And How to Avoid Them)
The recurring, avoidable errors that slow down new solar businesses.
Net-Zero Homes: Can Rooftop Solar Get You There?
What "net-zero" actually means for a home, and how close rooftop solar gets you.
Solar ROI: How to Calculate Payback Period
The simple math behind when a rooftop solar system pays for itself.
How to Start a Solar EPC Business in India (Quick Checklist)
The essentials before you take your first rooftop solar project.
What Is an EPC in Solar? Roles and Responsibilities Explained
EPC stands for Engineering, Procurement and Construction — here's what that means day to day.
Understanding Solar Inverters: String vs Micro
The inverter decides how your system handles shading and faults — here's the real difference.
Solar Panel Cleaning and Maintenance Checklist
Solar is low-maintenance, not no-maintenance. Here's what actually needs attention.
How Long Do Solar Panels Actually Last?
Panels don't die at 25 years — they degrade. Here's what that actually looks like.
Solar Panel Types: Monocrystalline vs Polycrystalline vs Bifacial
The three panel technologies EPCs quote most often — and where each makes sense.
On-Grid vs Off-Grid vs Hybrid Solar Systems — Compared
Three ways to wire a solar system — and which one actually fits most Indian homes.
Net Metering Explained: How Solar Credits Work in India
How exported solar units get credited to your bill — and what to check before signing up.
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