Solar water pumping system – Hospital in Mbeya, March 2021
System criteria
A 4kw submersible solar water pump was installed in a spring catchment area which pumped water 750 meters to a hospital to supply water for daily needs. The installed pump has a capacity to pump 8500 liters per hour and is fully automated.
Technical data
Solar Array: 4.41KWp
Pump type and controller: Lorentz PS2-4000 C-SJ8-15
Image 1: Ground Mounted Solar Array
Image 2: Pump Tripod Stand
Solar power system and solar water pumping system – Biharamulo February, 2019 & June 2020
System criteria
This solar power system was designed to supply power to the Hospital in the Biharamulo District. The system was designed to be developed in phases, initially to test the investment environment for the donor and then to cater to the hospital’s increase in power requirements over time. The first phase was an AC coupled three-phase solar power system using SMA PV and battery inverters with 11.5 kW of solar and a VRLA battery bank from BAE in Germany. This phase identified the need for a greater solar contribution and a reliable backup generator to cover periods of grid outage so a second phase saw an additional 15.6 kW of solar with a 15 kW inverter installed together with a 50 VA generator hybridized with the solar power system, with power input automated to be available should the grid fail.
The current system as installed is operating well although a follow-up investment phase may be required at a later date when hospital loads and consumption start to reach the limits of the installed system. The AC coupled design utilizing SMA components enables phased growth of the system utilizing the multi-cluster approach for battery inverters and an associated battery bank.
Technical data
Power Sources: Solar/Diesel Gen-set/Grid power
Solar Array: 23.1Kw in two ground-mounted East-West oriented arrays
Battery Inverter: 3x SMA Sunny Island 8.0H (Configured for three-phase AC output)
PV Inverter: Sunny Tripower 10000TL-20 and Sunny Tripower 10.0
Battery: Valve Regulated (Gel) Lead Acid Battery (VRLA) 82.08kWh @ 48V (24 x 2V Batteries)
Generator: Fully integrated and automated 50 kVa FG Wilson three-phase generator
Solar Power System – Hospital in Karatu Jan 2019 – March 2021
System criteria
Power Providers engaged in a process of installation of a solar power system designed using SMA PV and battery inverters to provide three-phase power. This power was distributed to a segregated load base identified as ‘critical loads’ such as those for the operating theater, neonatal unit, laboratory, IT system, and maternity ward. The process is ongoing and further phase engagement could see the solar power supply extended in the future to meet other less critical loads such as water pumping, administration, air conditioning, etc.
Technical data
Power Sources: Solar/Diesel Gen-set/Grid power
Solar Array: 26.5Kw roof-mounted North oriented array
Battery Inverter: 3x SMA Sunny Island 8.0H (Configured for three-phase AC output)
PV Inverter: Sunny Tripower 25000TL-20 3 Phase PV Inverter
Battery: Tess Volt Lithium Ion 365 AH @ 48V battery bank
Generator: Fully integrated and automated 110 kVa FG Wilson three-phase generator
Generator – Hospital in Gonja, Kilimanjaro – August 2021
System criteria
Power Providers engaged in a process of design, supply, and installation of a generator to provide three-phase power backup. The generator powers the hospital’ss premises such as the administration office, operating theater, neonatal unit, laboratory, mortuary, and all wards including children and maternity ward.
Technical data
Generator type: FG Wilson
Generator Model: P50-3, powered by Perkin Engines diesel generator
Generator Size: 50 kVA
Phase: Three-phase with Automatic change over switch CTI
Power Providers Tanzania 