We want a 250–1000 kW solar plant this quarter—can you start fast?
Yes. We run a 14‑day sprint: site survey, load analysis, baseline yield model (PVsyst), and a board‑ready concept pack. Parallel tracks open vendor/financing options so the decision isn’t blocked by paperwork.
One owner only—no vendor ping‑pong
You get a project manager (PM) who is your single window across design, procurement, permits, construction, and commissioning. Daily tracker + weekly milestone report.
What’s the fastest way to a ballpark CAPEX and savings?
Give us last 12 months’ bills, tariff slabs, sanctioned load, and usable area. We return a ballpark size, generation, CAPEX/OPEX options, and payback/IRR ranges within 48 hours.
We need a board note by Monday—can you package it?
Yes. 12‑slide investment memo: baseline vs. optimized design, energy yield, savings, CAPEX/OPEX, risk register, phasing plan.
Rooftop vs. carport vs. ground—what’s right?
Depends on structure capacity, shading, access, fire codes, and future expansion. We simulate scenarios and recommend a mix (e.g., 500 kW rooftop + 250 kW carport) with comparative LCOE.
Can you integrate with diesel gensets and grid seamlessly?
Yes—hybrid logic through zero‑export relays, reverse power protection, and priority settings mapped to your DG controller/grid interlocks.
We have multiple sites—can you phase deployment?
We prioritize by tariff, roof quality, and load profile; then roll in waves with a common kit (modules/inverters) to simplify spares and training.
NDA and data security?
We work NDA‑tight, restrict drawings on need‑to‑know, and use expiring review links; on‑prem storage if required.
What do you need on Day 1?
12‑month bills, roof/parking drawings, sanctioned load, peak/off‑peak profile, and any roof warranty/structural notes.
Can you work around a live retail/commercial campus?
Yes—night work windows, barricaded zones, method statements for public safety, and quiet operations near tenants.
Is my roof strong enough for solar?
We run a structural feasibility: load allowance, purlin spacing, wind uplift; propose ballast or anchor systems per IS 875/IS 1893. For older RCC, we core‑test if needed.
How much area do we really need per kW?
As a planning rule, ~90–110 sq.ft./kW for fixed‑tilt rooftop, ~70–80 sq.ft./kW for carports (net parking preserved), ground‑mount varies by tilt/row spacing.
We have shading from nearby buildings—still viable?
We perform a shade analysis (heliodon/3D + on‑site sun path). Stringing is optimized with MPPT distribution and module‑level electronics if required.
Our roof warranty forbids penetrations—options?
Non‑penetrating ballast systems, chemical anchors in permitted zones, or hybrid rail systems that respect warranty clauses.
High wind/cyclone zone—safe?
We design to local wind speeds with pull‑out tests and wind tunnel reference data; edge zones get reinforced bracing and deflectors.
Fire safety and access paths?
We maintain code‑width corridors, combiner spacing, and fireman’s pathways; apply PV hazard labels and AC/DC isolators accessible to responders.
We run chilled water plants—any special considerations?
Yes—daytime load is ideal. We coordinate with chiller/DG logic so solar prioritizes when grid is stable; prevent nuisance trips.
Can we place panels over asbestos/old sheets?
We do not mount on asbestos. We propose sheet replacement (PPGI/AL) or carports to preserve parking while generating power.
Earthing and lightning in high‑rise?
Dedicated PV earthing grid bonded to main earth; coordinated lightning protection per IEC 62305 with equipotential bonding.
EV chargers under carports?
Yes—AC/DC chargers integrated with load management; solar priority with grid/demand limits.
Can you share a professional SLD and layout?
We deliver stamped SLDs, stringing plans, combiner/inverter locations, AC/DC cable routes, earthing, and lightning schemes.
Energy model accuracy?
PVsyst with local irradiance, module/inverter libraries, soiling/temperature losses, and shading scenes. We share key assumptions and P50/P90 output.
Module technology—mono PERC vs. TOPCon vs. HJT?
We evaluate LCOE, temperature coefficients, bifacial gains (if relevant), supply reliability, and warranty strength; we recommend what balances cost and risk.
String inverters vs. central—what’s better for us?
For rooftops/carports, string inverters give better granularity and uptime; central suits large ground‑mounts. We simulate clipping, redundancy, and O&M cost.
AC/DC cable sizing and losses?
We size cables for current, voltage drop, and temperature; route to minimize long DC homeruns. Loss budgets are visible in the model.
Zero‑export and reverse power protection?
CT‑based controls with fast response, PLC/relay logic integrated to main incomer/AMF panels; factory‑tested before site commissioning.
SCADA/monitoring—what do we see?
Plant‑level and string‑level dashboards, PR, specific yield, alarms, and ticketing hooks for O&M. API for your BI tools.
Aesthetics—visible roofs and premium campuses.
Cable trays aligned, symmetric arrays, color‑matched finish, hidden conduits where feasible; carport cladding options for premium look.
Battery or not?
If tariff spread and backup needs justify, we model lithium battery options (peak‑shave, backup, TOU arbitrage). Otherwise, we keep it grid‑tied for ROI.
Future expansion provisions?
We oversize trunking, leave spare ways, and mark tie‑in points for the next phase.
DISCOM approval and net/ gross metering?
We manage applications, drawings, inspections, meter changes, and commissioning certificates per state regulation.
Electrical inspector & CEIG—who handles?
We prepare dossiers, pay fees, coordinate inspections, and close compliance comments.
IS/IEC standards you follow?
We align with IS 16221, IS 3043, IEC 60364, IEC 61215/61730, and local codes; method statements available.
Fire NOC and safety labeling?
Fire pathways, isolators, shut‑down schematics, and PV hazard labels installed per code; coordination with your safety team.
Work at height and public safety?
Harnesses, lifelines, barricading, hot‑work permits, and tool lanyards; work windows around public hours.
Insurance coverage?
Contractor all‑risk during build; post‑COD asset and liability cover recommendations with insurers.
QA/QC during construction?
Incoming material checks, torque logs, IV curves, insulation tests; a QC dossier handed over at COD.
Earthing and lightning test results?
We submit resistance readings, continuity checks, and LPS commissioning records.
Environmental & waste handling?
We manage packaging disposal, metal scrap records, and e‑waste compliance with authorized vendors.
Emergency shutdown protocol?
Clear labeling, rooftop isolators, MCC tie‑ins, and a laminated SOP for your facility team.
Tier‑1 modules and bankable inverters?
We source Tier‑1 modules with strong backsheets and warranties; inverters with proven service networks and spares in India.
Lead times right now?
Modules 2–6 weeks, inverters 3–5, structures 2–3, balance of system 1–2; we buffer critical items.
How do you avoid roof leaks?
Approved anchors/chemical fasteners, sealed penetrations, and water‑testing of critical zones; detailed as‑built drawings.
We can’t block parking—carport plan?
Phased bays, safety marshals, weekend/night works, and prefabricated structures to shorten on‑ground time.
Cable management and aesthetics?
UV‑rated conduits, color‑coded trays, neat bends, and identification tags; all routes are documented.
Factory Acceptance Tests (FAT)?
FAT for inverters/relays/PLC panels; we witness or obtain third‑party reports.
Site Acceptance Tests (SAT) & commissioning?
Insulation, polarity, IV curves, string tests, inverter commissioning, and grid sync tests with DISCOM witness.
As‑built and handover documents?
Drawings, datasheets, test reports, warranties, spares, O&M manuals, and training records.
Spare strategy?
Critical spares kit (fuses, MC4s, SPD, fans) + one spare inverter/string level per capacity for quick swaps.
Work windows without disrupting tenants.
Noise‑sensitive sequencing, off‑hours lifts, and coordinated shutdowns with prior notices.
What does your AMC include?
Preventive maintenance schedule, real‑time monitoring, ticketing with SLAs, cleaning cadence, periodic PR audits, and quarterly performance reviews.
Cleaning frequency—what’s ideal?
Depends on soiling index; we start with monthly and adapt from PR trends. Water‑saver and waterless options available.
PR is falling—what do you check?
String health, IV anomalies, hot spots (thermal camera), earthing, and inverter logs; actions documented.
Remote monitoring dashboards?
Web/mobile dashboards with site/portfolio views, alarms, energy vs. target, and exportable reports for management.
Ticket response and uptime?
Severity‑based SLAs; spares on site for fast resolution; uptime targets >99% measured monthly.
Warranty claims—who drives?
We file, test, and close loop with OEMs, managing replacements and documentation.
Training for our facility team?
On‑site sessions, safety SOPs, and quick‑reference guides; refresher every 6–12 months.
Performance benchmarking across sites?
Normalized specific yield, weather‑adjusted, with peer comparisons and flags for outliers.
Retrofit recommendations?
Fans/filters, firmware, shade fixes, and selective module replacements if degradation is clustered.
Reporting cadence?
Monthly ops report (energy, PR, faults, actions), quarterly strategy review (savings vs. plan).
What’s the payback and IRR we should expect?
Commercial rooftops often see 3–5 year paybacks depending on tariff and policy; IRR modeled with P50/P90 bands and sensitivity (tariff, degradation, cleaning).
CAPEX vs. OPEX (PPA)?
CAPEX maximizes savings; OPEX (third‑party PPA) saves upfront cash. We present both with NPV/MER and balance‑sheet treatment.
Accelerated depreciation/GST benefits?
We flag current tax treatments and structure procurement to optimize input credits where applicable.
Green financing?
We introduce vetted lenders/ESG credit lines and prepare tech packs they expect.
Escalation clauses in PPA?
Transparent tariff escalators vs. grid tariff trends; termination options and buyout windows clearly modeled.
Contracts—what do we sign?
EPC contract with scope, specs, warranties, LDs, and payment milestones; AMC with clear SLAs; optional PPA.
Change orders control?
We log scope/time/cost impacts, seek approval before execution—no billing surprises.
Who owns the asset and meters?
Under CAPEX—you own plant and instruments; under OPEX—asset owner per PPA; metering responsibilities defined.
Degradation and warranties?
Typical 2% first year, then 0.45–0.6%/yr; product and performance warranties tracked in a rights register.
Exit criteria for EPC/AMC?
Defined handover, punchlist closure, and knowledge transfer; AMC termination with documentation and admin access handback.
End‑to‑end timeline for 250 kW carport?
Concept + permits 4–6 weeks, procurement 3–5, structure fabrication 3–4, erection 3–4, electrical + commissioning 1–2—overall 12–18 weeks depending on permits.
Major risks and mitigations?
Permits, long‑lead items, monsoon, roof condition. We buffer orders, plan around weather, and pre‑inspect roofs.
Monsoon working?
Weather windows, temporary covers, and non‑slip PPE; critical lifts paused during high winds.
Public‑facing sites—safety?
Barricades, marshals, signage, and exclusion zones; night shifts to avoid peak footfall.
Grid instability—how do we protect?
Fast zero‑export response, surge/SPD coordination, and sequence interlocks with DGs.
Fire incidents—prevention and response?
Correct fusing/SPD, neat cable management, thermal scans, isolators, and trained facility teams with shutdown SOPs.
Roof leaks post‑install—how prevented?
Approved anchoring, sealed penetrations, water tests, and documented as‑builts; warranty terms maintained.
Vendor failure risk?
Multi‑vendor qualified lists, escrowed advances, and contractual LDs on critical delivery milestones.
HSE audits?
Internal + third‑party audits at milestones; non‑conformance logs resolved before next phase.
After‑sales responsiveness?
Ticket severity matrix with response/restore SLAs; uptime tracked and reviewed monthly.