By Vvon Engineering Team | Published | Updated
Separate hospital energy savings from clinically approved essential power, and plan roof work, connection, commissioning and maintenance.
Solar EPC & street lighting RFQ checklist (TXT)
Health-care facilities have different operating hours and electrical loads, including services with strict interruption limits. Plan daytime energy savings separately from the clinically approved essential-power arrangements.
Compare grid, generator and storage costs from the hospital's own records. Solar and storage may reduce purchased energy or support resilience, but neither a saving percentage nor a transfer time can be promised without the exact design and load requirements.
Use generator running hours, fuel consumption, serviced load and maintenance cost in the comparison. Some costs remain even when running hours fall; average fuel cost alone is not the avoided cost of every displaced kWh.
The hospital's electrical, clinical and safety teams should define essential circuits, permitted interruption and required autonomy. Coordinate PV, approved UPS systems, storage and generators around those requirements. A general-purpose hybrid inverter is not proof of uninterrupted life-critical supply.
Making that real means someone has to draw the line between critical and general, circuit by circuit, on the existing distribution boards. In most Bangladeshi hospitals that separation is partial: theatre lighting is on the essential board but the theatre air handling is not, or the blood bank refrigerator shares a circuit with a corridor. Expect the survey to find this, expect some reworking of the boards to be part of the project, and get it into the scope in writing. A solar contractor who quotes a battery without having traced the essential distribution has quoted for a different building.
| Input | Evidence needed | Why it matters |
|---|---|---|
| Consumption | Twelve months of bills and representative interval demand | Separates direct use, exports and changing demand. |
| Generation | Location, layout, weather dataset and loss assumptions | Estimates output month by month. |
| Connection | Sanctioned load, transformer and utility requirements | Establishes eligible capacity and approval conditions. |
| Installed cost | Dated itemised quotation and exclusions | Includes roof work, connection and commissioning. |
| Operating cost | Maintenance, insurance and replacement assumptions | Avoids treating later electricity as cost-free. |
Size any storage from a clinically approved load schedule, power and starting demand, transfer requirement, losses and autonomy. Bed count alone cannot determine battery kWh.
Review existing UPS and generator protection before changing the supply architecture. Preserve required redundancy and equipment-specific power conditioning unless the hospital's approved design establishes a suitable replacement.
Commission under a documented, authorised plan with clinical coordination and appropriate test loads or staged tests. Do not deliberately interrupt patient-critical services to demonstrate a solar system. Record transfer, autonomy, protection and failure-mode results against the agreed acceptance criteria.
Medical locations and connected equipment can have special power-quality, protective and isolation requirements. Establish the permitted PV connection point with the hospital's electrical designer. Imaging demand can cause voltage variation; available fault current is a separate network-design quantity.
An RCC roof still needs structural assessment for equipment, ballast, local reactions and wind. Coordinate waterproofing and access to avoid disruption to clinical areas.
The other constraint is that hospital roofs are busy and hospitals grow. Plant rooms, lift machine rooms, water tanks, air handling units and their service access all occupy roof that looks clear from above, and the array layout has to leave working room around them rather than boxing them in. Ask the administration one question early: is there any intention to build another floor? Fitting a 25-year asset onto a slab that is scheduled for vertical extension in year four is a costly sequencing error and a common one.
Identify the utility from the hospital's bill and obtain its current connection checklist. Confirm capacity, protection, metering and institutional-document requirements before installation.
Public procurement should follow the applicable current BPPA rules and funding conditions. State measurable equipment, reliability, commissioning, documentation and maintenance requirements in the tender.
Consult the relevant edition and the documents for the exact equipment and site: WHO: planning reliable electricity for health-care facilities; US Department of Energy: battery energy storage procurement checklist; SREDA: Net Metering Guidelines and current application documents; BPPA: current Public Procurement Rules; IEC 62548-1: PV array design requirements.
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