Zenlithic Solar Engineering
One engineering workspace, three portals, one source of truth.
Developer, EPC and Consultant all work off the same Site → Design → Layout → SLD → BOQ chain — with revision control, so a mid-project change is tracked, not silently lost.
Roof and ground conditions assessed before design begins.
The engineering chain
- 1Site
- 2Design
- 3Layout
- 4SLD
- 5BOQ
Portals
Create the project, assign an EPC and a Consultant, track progress.
Author Site survey, Design, Layout, SLD and BOQ for assigned projects.
Review and approve Design/SLD/BOQ before they lock in.
Solar engineering guides
Worked calculations from our design team — string sizing, inverter sizing, cable design, energy yield and layout.
A step-by-step guide to preparing a solar plant single line diagram (SLD) — the DC, LT and HT sections, protection, metering, earthing and ratings — illustrated with a 2.5 MW plant example.
How to calculate the kVA/MVA rating of a solar step-up transformer, choose impedance and vector group, estimate losses and fault levels — with a verified 2.5 MW plant example.
How to calculate the number of strings per MPPT and per inverter — operating current, short-circuit current, bifacial gain, string fuse requirements and orientation rules — with a verified worked example.
What GHI, DNI, DHI and POA irradiance mean, how they relate, how tilted-plane irradiance is calculated from them, and which one to use in generation, PR and PVsyst — with a verified worked example.
The difference between kW, kWp, MW, MWp, kVA, kWh and MU in solar projects — what each measures, where each belongs in a proposal or tender, and a worked 5 MWp / 4 MWac example.
How to calculate solar row spacing, pitch and GCR from sun position — winter-solstice shadow analysis, tilt trade-offs and land density — with a fully worked example for a fixed-tilt plant in Jaipur.