Resource Center
The Heaven Designs knowledge base — 280 engineering-led articles, 200 glossary terms, and the playbooks our team uses to deliver permit-ready solar designs.
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Topic hubs
Each hub clusters our long-form guides, glossary terms and related services around a single engineering discipline.
Solar Design Software
Independent reviews, alternatives and pricing breakdowns for every major solar design tool — written by engineers who run them on real projects.
Open hubPVsyst
Bankability-grade PVsyst workflows from a team that has run thousands of P50/P90 simulations for lenders, IPPs and EPCs.
Open hubSolar Permit Design
State-by-state and DISCOM-by-DISCOM guidance on permit plan sets, AHJ submission and revision cycles — from the team that delivers 500+ stamped sets a year.
Open hubSolar Engineering
The technical guides our engineers wish were published when they started — structural, electrical, modelling and field-failure analyses.
Open hubNet Metering & DISCOMs
DISCOM-specific net metering guides for India and tariff/interconnection guidance for major US utilities.
Open hubBattery Energy Storage
Engineering resources for hybrid solar + BESS plants — sizing, inverter pairing, grid code compliance and field commissioning.
Open hubSolar Outsourcing & EPC Operations
How EPCs and installers add design throughput without adding headcount — outsourcing models, pricing, QA workflows.
Open hubSolar Compliance & Codes
Code-level references for the standards that decide whether a plan set survives AHJ review.
Open hub— EDITORS' PICKS
Featured guides
Aurora Solar Alternatives for US Installers in 2026
Aurora Solar costs $159 to $259 per user per month. Seven alternatives compared by a working design bench on pricing, AHJ approval, NEC fluency, and ROI.
Read articleAurora Solar Pricing in 2026: Real Costs and a Cheaper Alternative
Aurora Solar runs $159 to $259 per user per month in 2026. Real plan-by-plan costs, four hidden add-ons, and a $108 per-user-equivalent alternative.
Read articleAurora vs HelioScope: 2026 Head-to-Head for Installers
Aurora vs HelioScope compared on pricing, shading, AHJ presets, and proposal motion. Plus the third option most installers do not consider in 2026.
Read articleBankable PVsyst Reports — The Complete 2026 Guide
What makes a PVsyst report bankable? This guide covers P50/P90 methodology, lender requirements in India, common errors that kill project finance, and how to commission a bankable yield study.
Read articleBest Solar Design Software in India 2026 — A Working Engineer's Stack
Best solar design software in India 2026 — PVsyst, AutoCAD, PVCase, Helioscope, HOMER Pro reviewed for Indian EPCs. Tool stack by project type and budget.
Read article— REFERENCE
Glossary by category
200 engineering terms, organised across six disciplines.
— DOWNLOADS & PROOF
Reports, samples and project proof
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