Bangalore Hospital Solar: 50 kW Planning Scenario

Illustrative planning scenario, not a customer case study. The 50 kW capacity is a working brief, not a recommendation. This page is not based on a signed customer record, site survey, interval load file, design, quotation, commissioning report or measured performance dataset. Every project outcome is therefore unknown.

A hospital cannot let a rooftop generation project blur the boundary between ordinary building loads and clinical continuity systems. This scenario shows the evidence needed to assess a 50 kW working brief while keeping patient safety and facility responsibility explicit.

What decision does this scenario test?

The question is not whether 50 kW “works” in the abstract. The question is whether that AC capacity, paired with a documented PV array and connection design, fits the hospital’s measured non-critical daytime load, available roof, electrical infrastructure and approval route.

A credible answer must survive three checks: the design is electrically safe, the responsible authorities accept it, and the commercial model still works when every cost and uncertain input is visible.

Evidence required before sizing

A missing input should stay marked as unknown. Replacing it with a typical value creates a neat payback number but not a reliable hospital decision.

Engineering controls for a hospital

• Keep clinical and life-safety continuity under the hospital’s approved UPS and generator architecture.
• Review protection coordination, power quality and electromagnetic compatibility with the facility engineer.
• Do not connect or reclassify medical loads from a generic solar proposal.
• Give the hospital maintenance team safe isolation, status visibility and an approved response procedure.

Hospital engineering, biomedical, safety and compliance owners must review the design. The phrase “non-critical load” is not a design decision until the hospital has classified and signed the circuit schedule.

The responsible electrical professional should sign the single-line diagram, protection settings and commissioning plan.

How should the commercial case be calculated?

Use measured inputs and keep the calculation reproducible:

1. Estimated annual generation = simulation output for the documented array, orientation, losses and weather dataset.
2. Self-consumed energy = the lesser of generation and coincident non-critical load in each interval.
3. Exported energy = generation minus self-consumed energy, subject to the approved metering arrangement.
4. Annual bill effect = avoided import charges plus documented export credit minus new fixed, demand, finance, service and maintenance costs.
5. Simple payback = eligible project cost divided by annual net cash benefit.

Do not publish a generation, saving, return or payback result until the calculation file identifies every input, unit, date and source. Tax effects need written advice from a qualified professional. Financing results need actual lender terms.

What can be said about Qbits equipment?

Qbits’ published catalogue lists on-grid and hybrid inverter families with model-specific ratings. That does not prove that a Qbits model is suitable for this hospital. Nor does it state universal harmonic performance, monitoring functions, certification, warranty terms, service coverage or project support.

If Qbits is shortlisted, record the exact SKU and request its current datasheet, installation manual, applicable certificates, monitoring scope, written warranty and service terms. Compare those documents with the final hospital design. MNRE’s current ALMM page concerns PV module and cell lists, not an inverter list.

What belongs in the handover record?

Keep approved drawings, the final equipment schedule, utility correspondence, protection settings, test results, commissioning readings, photographs, monitoring ownership, invoices, warranties and service contacts.

The EPC bid checklist helps compare proposals. The commissioning guide covers handover evidence. For a Qbits equipment enquiry, use the datasheet library and contact page.