New quality standard for PV-Diesel Hybrid Systems: Certified diesel savings reduce risk for investors and financiers

June 13, 2016

A new quality standard for data acquisition and calculations of diesel savings in PV-Diesel Hybrid Systems has recently been developed by the VDE Prüf- und Zertifizierungsinstitut GmbH (VDE Testing & Certification Institute) together with the Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH and the OneShore Energy GmbH.
Hier klicken und die deutsche Version lesen!


Through close cooperation with industry it was ensured that the standard meets industry requirements and high quality criteria while sustainably stimulating market growth.


Despite the intense activity of the private sector in the PV-Diesel Hybrid Systems market segment, only a few projects have been realised thus far. The lack of transparency behind diesel savings calculations especially undermines confidence for the involved stakeholders, which results in the hesitant involvement of commercial investors with regards to the evaluation and financing of such projects. "With this newly developed quality standard, we strive to establish a solid industry standard for calculating diesel savings for PV-Diesel Hybrid Systems, create more transparency and comparability and thus reduce the evaluation effort for customers, banks and equity investors" said Simon Bittner (GIZ).

The newly developed standard VDE-PB-0014:2015 “Procedure for load-measurements and extrapolation and Minimum Technical Requirements to determine the simulation input parameters for Hybrid-Power Generation Systems” defines specific criteria throughout the individual system design steps that are important for the calculation of energy balances and the resulting projected fuel savings which have a strong impact on the economics of a hybrid system. Through this, system design risks can be reduced and savings calculations can be made comparable for third parties. In this context, the standard allows for individual steps and criteria to be verified for compliance by independent certification institutes. An issued certificate serves as a seal of quality for customers, investors and financiers.


Comprising of four components, the standard includes the measurement and extrapolation of the electrical load, the characteristics of existing diesel generator sets, the planned photovoltaic system [together with the power electronics to interact with the diesel generators], an optional part concerning the integration of energy storage in the overall system, and finally, the definition of required power system stability criteria in the utilized simulation software. The components of the standard are defined based specifically on photovoltaic and diesel generator hybrid combinations as the power generation units. Nevertheless, the same standard is designed as a modular framework for future extension to include additional types of power plants (such as wind-diesel hybrid systems).


Download the VDE test specification VDE-PB-0014:2015


The VDE, GIZ and OneShore Energy GmbH cordially invite for a kick-off event officially introducing the standard at the Off-Grid Power Forum at Intersolar Europe 2016 on 22nd June 2016 at 9:30am.


Involved project partners


VDE Prüf- und Zertifizierungsinstitut GmbH 


The VDE Testing and Certification Institute, which is operated by the VDE, is a nationally and internationally accredited institution in the field of testing and certification of electrical equipment, components and systems as well as the evaluation of management systems. The electronic devices are tested concerning their safety, serviceability and other product characteristics.

Since 1920, the VDE Mark stands for safety and quality in the field of information and electric technology. Cooperation agreements in more than 50 countries ensure that the inspections conducted by the VDE are internationally recognized. The certificates and marks of VDE are accepted by manufacturers and retailers as an access to world markets.


Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH


The Project Development Programme (PDP), implemented by the GIZ within the framework of the “renewables – Made in Germany” initiative on behalf of the German Federal Ministry for Economic Affairs and Energy (BMWi), has been responsible for the development of the standard. 

The PDP supports German small and medium enterprises along the different stages of market positioning and project development in the promising, but often difficult markets of Southeast Asia and Sub-Saharan Africa. The program supports the transfer of technology and know-how, promoting sustainable market structures and the diffusion of renewable energies. 


OneShore Energy GmbH


The Berlin-based company OneShore Energy is a global leader in the design of Photovoltaic-Diesel Hybrid Systems. OneShore’s in-depth knowledge of diesel generators and extensive experience in the planning and implementation of solar systems form the base for the development of hybrid systems optimised for the customer’s needs. OneShore’s software solution consisting of OneAnalyser, OneDesign and OneOptimiser streamlines the whole process of customer load data measurement, system design and operational management, always in line with the newly developed standard. This creates transparency for customer and investor and reduces the design and investment costs significantly. OneShore’s products are already used in hospitals, industrial plants, coffee plantations and tea factories in Tanzania, Kenya and Rwanda as well as in Greece.


Download the press release as PDF