End-to-end consulting for BESS, Solar PV, and integrated energy storage systems — from sizing and financial modelling to tender documentation and beyond.
IIT+
Certified Experts
3X
Domain Coverage
24H
Response Time
What We Do
THREE DOMAINS. COMPLETE EXPERTISE.
Renelion brings together trained energy engineers to deliver end-to-end consulting across Battery Energy Storage, Solar PV, and Integrated BESS+Solar systems.
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Battery Energy Storage (BESS)
From BESS sizing and BEDPA to detailed electrical calculations and financial modelling — complete project support for standalone battery storage deployments.
SizingBEDPATender DocsFinancial ModelDegradation
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Solar PV Systems
End-to-end solar PV engineering — from energy yield analysis and inverter sizing to techno-economic feasibility, tender documentation, and commissioning support.
Energy YieldPVsystTender DocsFeasibilityGrid Integration
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Integrated BESS + Solar PV
Holistic design of hybrid solar+storage systems — optimising dispatch strategies, co-locating BESS with PV, and delivering bankable financial models for investors.
From a single-site industrial BESS to a multi-MW grid-scale project, we handle every technical and commercial layer — ensuring your system is correctly sized, financially optimised, and tender-ready.
Our BESS team brings experience across lithium-ion (LFP, NMC), flow batteries, and hybrid chemistries. We understand real-world constraints — thermal management, cycle degradation, grid codes — and we build those into every deliverable.
BESS Sizing & Design
MW/MWh sizing from load profiles, power flow analysis, duration optimisation, technology selection and configuration design.
BEDPA
Battery Energy Detailed Project Analysis — comprehensive technical studies covering degradation, round-trip efficiency, and lifetime performance.
Tender Documentation
RFP/RFQ preparation, technical specifications, scope of work, data sheets, vendor shortlisting, and bid evaluation.
Detailed Calculations
Electrical load flow, short circuit studies, protection coordination, harmonic analysis, and cable sizing for BESS integration.
Site assessment, technology comparison, risk analysis, implementation roadmap, and go/no-go feasibility studies.
Solar PV Systems
SOLAR PV ENGINEERING & CONSULTING
Comprehensive solar PV consulting for utility-scale, C&I, and rooftop projects — combining PVsyst modelling, grid engineering, and rigorous financial analysis.
Our solar engineers have delivered projects across multiple states in India and are experienced in DISCOM interconnection, CEIG/CEA approvals, and RPO compliance. We go beyond reports — we deliver documents you can submit.
Energy Yield Analysis
PVsyst-based P50/P90 generation modelling, shadow analysis, soiling loss estimation, and long-term performance forecasting.
System Sizing & Design
DC/AC ratio optimisation, inverter and module selection, string configuration, layout design, and irradiation studies.
Performance ratio benchmarking, O&M contract review, IV curve analysis, thermography interpretation, and degradation tracking.
Integrated BESS + Solar PV
HYBRID SOLAR + STORAGE SYSTEMS
The most complex — and most valuable — energy systems require both BESS and solar expertise working in tandem. Renelion delivers fully integrated hybrid project consulting.
Hybrid projects demand a rare combination of storage chemistry knowledge, solar yield modelling, and grid dispatch expertise. Our cross-domain team handles it as a single, coherent engagement.
Co-Location Design
Shared infrastructure planning — transformers, switchgear, interconnection — for solar and BESS on the same site, minimising CAPEX.
Dispatch Strategy
Revenue-maximising dispatch algorithms — time-of-use arbitrage, peak shaving, ancillary services, and solar firming strategies.
Integrated Sizing
Optimisation of PV capacity and BESS duration together — iterative modelling to find the commercial sweet spot for your use case.
Bankable Feasibility Reports
Lender-grade technical and financial reports including independent engineer (IE) quality assumptions for project finance.
Tender & Procurement
Fully integrated tender packages covering both PV and BESS scopes — single-point vendor or split-contract approaches.
Financial Modelling
Hybrid revenue stack modelling — combining solar generation revenue, BESS ancillary income, capacity payments, and green certificates.
Grid Code Compliance
Ensuring hybrid systems meet IEGC, SERC, and CEA requirements — forecasting obligations, reactive capability, and protection settings.
Performance Monitoring
Integrated SCADA/EMS advisory, KPI dashboards, actual-vs-model benchmarking, and intervention recommendations for live projects.
Why Renelion
BUILT BY ENGINEERS. FOR ENGINEERS.
Our Team
IIT+
Alumni & Experts from India's top engineering institutions
Our consultants are IIT alumni with specialisation in power systems, energy storage, and renewable energy — bringing academic rigour to every commercial engagement.
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Real-World, Field-Tested Approach
Solutions grounded in real project constraints — not textbook theory. Our deliverables can be submitted to DISCOMs, lenders, and EPCs as-is.
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Commercially & Technically Optimised
We balance engineering performance with financial viability. Every recommendation considers CAPEX impact, revenue potential, and regulatory risk.
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Fast Turnaround. Clear Outputs.
We deliver on timelines that match your project schedule — with documents and calculations you can use immediately, not reports you need to decode.
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Full-Spectrum Domain Coverage
BESS, Solar PV, and hybrid integrated systems — one team, three domains, zero gaps. No need to coordinate multiple consultants.
HAVE A PROJECT IN MIND? LET'S DISCUSS.
Whether you're at planning stage or need support on an active tender, our trained engineers are ready to help.
About Renelion
ENERGY EXPERTS INDUSTRY TRAINED
Renelion is an energy engineering consultancy founded by IIT-trained experts specialising in Battery Energy Storage Systems (BESS), Solar PV, and integrated hybrid energy systems.
Our team brings together engineers from India's top IITs — combining deep academic foundations in power systems and energy with hands-on project experience across industrial, commercial, and utility-scale deployments.
We believe that the best energy consulting is technically precise and commercially grounded. Our deliverables — whether sizing reports, tender documents, BEDPA studies, or financial models — are built to be submitted and used directly, not translated or reworked by your in-house team.
Renelion covers three domains: BESS, Solar PV, and Integrated BESS+Solar systems. This breadth — backed by a single, cohesive team — means you get consistent quality across every phase of your project.