Solar PV water pumping study - FINAL REPORT ... - UNDP, Namibia

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Feasibility Assessment for the Replacement of Diesel Pumps with Solar Pumps 6 RECOMMENDATION FINAL REPORT: September 2006 The lobbying activities that follow this study need to focus on the following stakeholders which have been identified as those which will have the broadest impact on the uptake of PVP in the Namibian market: • Commercial farmers: As shown most of the boreholes in Namibia are on commercial land. This is therefore the sector that can make the most significant impact. The identified media for lobbying the commercial farmers are through the monthly/bimonthly publications, the radio as for example the Landbou Mikrofoon and Farmers Info, as well as through the electronic media of the farmers unions and the hospitality association. • Consultants Engineers designing water pumping systems for Ministries such as MOHSS, Ministry of Education and Ministry of Home Affairs (Police Stations). • Suppliers: Although the service infrastructure for PVPs outside the capital has improved, it will be beneficial to further increase the turn-around times for PVPs to become operational after breakdown in order to further alleviate water supply security concerns of users. • Suppliers: Investigate warehousing options for RETs, as to be better prepared for increased demand in PVPs. The experience with Solar Water Heaters has been that delivery times for SWH systems have become a few months due to increased demand and the sector has not been responding rapidly enough. • Theft prevention measures: Inform potential and existing users of PVPs what measures can be employed for avoiding or reducing the risk of theft. Make use of existing information channels such as the Agricultural Unions, the radio and the internet. The key messages that need to be shared with selected stakeholders is that for average pumping applications: • The capital cost of PVPs in the sub 300 Wpeak range is similar or lower than diesel pumps. • The cheaper operating costs of PVP leads to significantly lower life cycle costing of the PVP option up to a hydraulic load of 4,000m 4 /day below 120m head. • Diesel pumps which deliver low volumes at low head are costly due to poor load factor and higher per kW fuel consumption. A PVP of the same daily delivery will have a lower initial capital cost than the diesel pumping system. • Flexible hybrid pumping options are available to allow for higher daily water requirements, which are able to operate on solar as well as diesel/petrol generators. • The sector needs to utilise robust technology which is not always the case. This applies to both PVP and DP, both of which offer a range of quality of products. The poorer quality products require more frequent maintenance intervals and have shorter life expectancy. • Using PVP for critical water supplies (noting that almost all water supplies are critical) requires higher levels of redundancy. Considering that the PVP has a life cycle cost which is always less than the equivalent diesel pumping option for the systems modelled here there are sufficient “funds” to provide spare parts as well as critical Page 50 of 76
Feasibility Assessment for the Replacement of Diesel Pumps with Solar Pumps FINAL REPORT: September 2006 components such as the controller, motor/pump unit and a few solar PV modules and still retain lower costs compared to a diesel pump. These components, although potentially never utilised, will provide security of water supply. • Loans are available for funding the upfront costs of a solar pump! The communal water supply market cannot be approached without a better understanding of the barriers and strategies which will truly enhance service delivery at reduced cost. In order to increase the uptake of PVPs in the service of the community and lessen the financial burden with regards to the full cost recovery for operation, maintenance and replacement as planned for 2010 the following activities are recommended: o Conduct an in depth survey of communal water supplies operated on diesel and solar in three regions: Omaheke, Otjiozondjupa and Kunene. o Conduct interviews with the Water Point Committee members as well as extension officers for DRWS in the region determining water needs, current pumping solutions, problems (fuel supply, reliability, water shortages, human capacity) and financial realities. Establish what the impact will be on community affordability when the full cost recovery (excluding capital cost) is implemented as per cabinet decision. o Determine the training requirements of water point operators and extension officers for PVP systems. o Determine the service infrastructure requirement for PVP systems, including full component replacement kits (controller, motor and pump) which would still provide a significantly lower all-inclusive cost as compared to diesel pump solutions. o Understand the institutional setup which is supporting the current wind and diesel systems. Determine the current level of standardisation. Determine the capacity building needs for the potential addition of PVPs into the support infrastructure. o Identify PVP selection criteria which take cognisance of the water requirement characteristics for communities and implement three pilot schemes in communities that can serve as a demonstration to other communities. The demonstration should consider PVPs with a back-up generator and tracking arrays. o Follow-up with a monitoring exercise to determine impact and lessons. Page 51 of 76
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Solar PV water pumping study - FINAL REPORT ... - UNDP, Namibia

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