Guides

    Long-form handbooks from the GarunaCDX engineering team — each one takes a real problem end to end, from architecture decisions to the launch checklist.

    0+ guides0 topic tracksWritten by our engineers
    Comprehensive guides

    Featured handbooks

    Multi-chapter handbooks built like a syllabus — start at chapter one and finish with a plan you can put in front of your team.

    Comprehensive guide
    The Buying custom software Handbook
    7 chapters · Intermediate
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    Comprehensive guide
    The Running a solar EPC business Handbook
    8 chapters · Intermediate
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    All guides(16)

    Buying custom software

    Data, security and compliance: decisions to make before launch

    What you collect, where it lives and how people consent and delete are design decisions. What the App Store already requires and what India's DPDP Rules reportedly require. Not legal advice.

    Running a solar EPC business

    Field operations, O&M and adoption: systems that survive the roof

    Design for six roles, work offline, capture once, and run O&M as a loop from alert to renewal. The adoption chapter.

    Running a solar EPC business

    Billing, cash flow and receivables for solar EPCs

    Staged payments, long final milestones and bank guarantees turn profit into a cash problem. How to track milestones, retention and guarantees as dated obligations.

    Running a solar EPC business

    Where solar EPC money leaks between quote and final payment

    Seven leak points from the survey to the last milestone, ranked by how quietly they drain margin and cash. A map to the rest of the guide.

    Running a solar EPC business

    The solar project lifecycle: stages, owners, documents and handoffs

    Lead to O&M in nine stages: who owns each, which documents move, and which handoffs break.

    Running a solar EPC business

    Start here: running a solar EPC business on connected systems

    A guide for owners and operations heads of Indian solar EPC and installer companies. Find your stage, pick your reading path, and see where the money leaks between quote and final payment.

    Running a solar EPC business

    Procurement, inventory and warranty: one chain from supplier to roof

    Link purchase orders to the BOM, gate crews on material, and carry the serial number from the supplier's invoice to the customer's roof.

    Running a solar EPC business

    Choosing the system: sheets, stitched stack, configured ERP or custom build

    A rule for the order to try things in, a requirements list, a vendor demo script and the two tests that decide it.

    Running a solar EPC business

    Costing and margin control: from quote to forecast margin

    Make the quote the budget, tag every cost to a project, and review forecast margin weekly. The chapter that decides whether you steer or just report.

    Running a solar EPC business

    Approvals, net metering and subsidy: make the waiting visible

    Installation takes days; approvals take weeks. A tracker per DISCOM, a subsidy claim pipeline and the equipment rules that cause rejections.

    Buying custom software

    Rollout, adoption and handover: making sure the old sheet really retires

    Adoption fails when the new system is one more screen on top of old habits. Design for the daily tasks, set a retirement date and hand over everything in writing.

    Buying custom software

    Architecture questions to ask: backend, concurrency and testing

    Three questions that decide whether a platform survives a busy day: how many backends, what happens on a retry, and what was tested before launch.

    Buying custom software

    Build, buy or configure: how to decide, and what goes in version 1

    Most teams pick the tool before they define the problem. A short decision path, and how to scope a first release that ships.

    Buying custom software

    Start here: who this guide is for, and which stage you're at

    A guide for people about to buy or build a platform, internal system or website, or hire a vendor for tech and go-to-market. Pick your path, find your stage.

    Buying custom software

    Choosing and vetting a vendor, and what the handover should look like

    Years in business are a weak signal. Habits you can inspect are a strong one. Eight checks, a handover list and a maintenance list you can hold any vendor to.

    Buying custom software

    Tech and go-to-market together: publishing, search and one vendor or two

    Marketing should publish without a developer queue, a relaunch should not delete your visibility, and the one-vendor-or-two question has an honest answer that depends on your stage.

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