New client: The sustainable Japanese-inspired restaurant Yujo Izakaya

05 October 2021

“The opportunity offered by enables us to take the most significant step towards our sustainability goal so far. By harvesting the suns’ power during the day, we will reduce the strain on our local electricity grid and encourage others to follow our example, while at the same time drastically reducing our electricity costs.”

– Hanif Rehemtulla, director of the Yujo Izakaya restaurant in Kampala, Uganda

We welcome our new client, the Yujo Izakaya restaurant under the direction of Hanif Rehemtulla in the heart of Kampala, the capital of Uganda.

The kitchen specializes in Japanese-inspired dishes, and Hanif Rehemtulla is committed to making the dining experience at his restaurant an overall positive and sustainable experience: His dream is to ultimately absorb more CO2 than what is released. To get even closer to its goal, the Yujo Restaurant wants to cover its energy needs with solar energy in the future and is working with to do this.

This also means that we will soon be able to offer you another sustainable investment offer! Because investments don’t have to be unethical 😊

We’ll keep you up to date!

Energy Payback Time: When does a solar plant contribute to climate protection?

21 September 2021

Before a solar plant can produce sustainable electricity, a lot of energy goes into the production of the solar panels. The question is: When does a photovoltaic systems start contributing to climate protection?

The answer lies within the so-called Energy Payback Time. The Energy Payback Time describes how long it takes for the energy system to produce the same amount that was required to manufacture the energy system in the first place. The higher the incoming solar radiation, the faster you can get the energy needed for the manufacturing process back. In addition, the grid quality and the electricity mix also play a role in the Energy Payback Time.

Now the Fraunhofer Institute for Solar Energy Systems ISE has determined the Energy Payback Time for roof-based solar systems. The study found that the Energy Payback Time for solar roof systems ranges from a minimum of 0.44 years in India and a maximum of 1.42 years in Canada. In Europe, the Energy Payback Time lies between 1 and 1.3 years. With 1.05 years, Sicily comes in first amongst the European countries. With a lifespan of 20 years, such a system can thus produce around 20 times the amount of energy that was needed to produce it.

The study was published in the Photovoltaics Report (PV Report) and looked at monocrystalline solar modules with an efficiency of 19.9% ​​that were produced in China. But how would the Energy Payback Time change if the modules were produced in the EU? According to the institute based in Freiburg, the Energy Payback Time would decrease from 1.05 to 0.97 years for a roof-top solar system in Sicily, and from 1.28 to 1.16 years for the average for the EU.

You can find the full report here:

Photovoltaic Report by the Fraunhofer Institute for Solar Energy Systems ISE

Image by Aron Visuals on Unsplash partner company Envidatec is EnvironmentPartner of the city of Hamburg is a startup and still young – but with Envidatec GmbH, we have a partner company by our side that has been active in the fields of energy efficiency and renewable energies for 20 years. Envidatec has successfully implemented international projects in over 35 countries. Today Envidatec is the leading consulting brand in the framework of the UN Sustainable Development Goals.

Envidatec has been an active environmental partner of the City of Hamburg since 2013. The Environment Partnership of Hamburg is “a public commitment to voluntary environmental and climate protection in Hamburg.” The initiative’s logo is a well-known seal of quality for exemplary companies. The latest campaign of the Hamburg Environment Partnership is Stadtradeln – city cycling. The Germany-wide competition is a 3-week initiative that calls on citizens to leave their car parked more often between September 1st and September 21st and take their bike instead – and collect as many bike kilometers as possible. In this way, outdoor exercise and climate protection are combined.

Peer Schuback from Envidatec GmbH not only applied for the environmental partnership, but also set up a company team for the latest campaign. And the city of Hamburg provides prizes: Who collects the most bike kilometers and is the winner in the end?

Peer Schuback

Peer Schuback, Managing Director at Envidatec GmbH


„Climate change is evolving quickly. This year we clearly see the effects in Germany [catastrophic floodings], which is why it is essential that companies are committed to protecting the environment and the climate. We support our clients on the path to CO2 neutrality.“

– Peer Schuback, Managing Director at Envidatec GmbH


We are proud to call Envidatec our partner company, a company that is committed to environmental and climate protection beyond legally binding frameworks.

Watch now: Installation of the solar plant for the first 5-star eco hotel of Uganda

Join us and take a look behind the scenes and see exclusive footage from the construction of the solar plant for the first 5-star eco hotel in Uganda, the Aquarius Kigo Resort. You will also learn about interesting details and background information, such as why the angle of the solar panels matters, and what the tourists from all around the world travel to Uganda for.

The 28 kW plant is a great success and reliably delivers affordable green energy. As a result, we’re saving a significant amount of CO2 and strengthen the local economy of the region with sustainable energy.

Enjoy watching!

Listen now: episode on sustainability podcast Green Thru

We are stoked to share with you our episode at sustainability podcast Green Thru with CEO Eric Della Casa!

Eric founded Green Thru with the goal to make complex sustainability questions easy-to-understand, and highlight the most exciting startups and businesses with a sustainability mission. In his weekly podcast, Eric interviews the founders of sustainable businesses and sustainability experts, and our CEO Thomas Frank was the guest for the latest episode!

You can now listen to the episode on Google Podcasts, on Apple Podcasts, and on Spotify! episode on sustainability podcast Green Thru:

Listen now!

We thank Eric for a very exciting and insightful talk about the successful operation of the solar plant for the Aquarius Kigo Resort in Uganda, future plans for and more.

Get a little sneak peak with the teaser of the episode here:


About the episode: “How can renewable energy projects in developing economies be sponsored by retail investors and how are such projects ensured to succeed? The conversation with Thomas Frank explores the logistical, economic and social intricacies associated with ensuring that such projects are run successfully in developing economies. Tune in to find out more about’s latest successful project in Uganda through the installation of solar panels at a 5-star eco-tourism hotel near Kampala and much more, enjoy!”

Eric Della Casa CEO of sustainability podcast Green Thru

Eric Della Casa, CEO of sustainability podcast Green Thru

About Eric Della Casa: After his BSc in Banking, Finance and Management from Loughborugh University and his MSc in Investment Management at Cass Business School, he decided to broaden his knowledge within the sustainability sphere through the undertaking of the course ‘Business and Climate Change: Towards Net Zero Emissions’ at University of Cambridge.

Curious? Find out more about Green Thru and follow Eric Della Casa on LinkedIN.

Exclusive webinar for investors

Great news: The first solar plant reliably delivers affordable solar power for the Aquarius Kigo Resort in Uganda!

We are excited to share these great news with you: The first project is a total success. The only 5-star eco hotel in Uganda, the Aquarius Kigo Resort, now benefits from the first solar plant. The solar plant reliably delivers affordable solar power. Together with us, our investors took an active step towards a sustainable and fair future for all. Our success is a shared success.

We will update you with more pictures and details, soon. Furthermore, we would like to invite our German-speakers to our webinar on Tuesday, 10.08. at 18:00 CET!

In the webinar, we will cover:

The webinar also aims at answering your questions. What would you like to find out? Email your questions to

Register now for our exclusiv webinar for investors and anyone interested in investments

Register here for the webinar (German)

Don’t speak German but are still curious about our sustainable investment opportunities? Please contact us, we look forward to hearing from you and will assist you to our best abilities!

Unser erstes Projekt war ein voller Erfolg: Unsere erste Solaranlage auf dem Dach des Aquarius Kigo Resort in Uganda läuft gut und liefert zuverlässig günstigen und grünen Solarstrom.

The first project is a total success: Our first solar plant on the roof of the Aquarius Kigo Resort in Uganda reliably delivers green and affordable solar energy.

Is Madagascar the next destination?

Renewable Energies and Mini-Grids in Madagascar: Find out what our COO Behzad learned about Madagascar, why it holds great potential for projects, and what that means for our impact investors!

Is Madagascar the next destination? Photo by Marine Lacourie on Unsplash

1. Behzad, you just spent an entire virtual week in Madagascar. What was that all about?

The virtual event in Madagascar was a part of “Mittelstand Global Exportinitiative Energie” program. The Southern African-German Chamber of Commerce and Industry, together with the Renewables Academy (RENAC) AG, organized an online conference about self-supply with Renewable Energies and Mini-Grids in Madagascar. The primary goal of this conference and the B2B meetings was to encourage exchange and explore business opportunities for self-supply and mini-grids between Malagasy and German technology and service providers, institutions and sector experts.


2. What was one interesting thing you learned?

It was interesting to learn about the huge potential for renewable energies for self-supply and mini-grids in Madagascar. The current power access rate is only 16%, for a population of 28 million people. On top of that, the expansion of renewable energy is a top priority for the government of Madagascar!


3. What does this mean for

I see Madagascar as one of our future destinations. The conditions for energy businesses like are very good: Laws make it easy to implement energy plants in the off grid segment, and net metering and feed in tariffs are included in the country’s legal frameworks. A new law allows licensed IPPs (Independent Power Producers) like us to sell electricity, so those are good starting conditions!

In addition, I had around ten B2B meetings and it became evident that there is a high local demand for solar solutions like ours as well as a strong pre-existing network. Both the people of Madagascar as well as our investors could therefore benefit from activities.


The solar potential is extremly high almost all over Madagascar. Perfect conditions to expand solar energy for a sustainable energy supply for the island! © 2019 The World Bank

The solar potential is extremly high almost all over Madagascar. Perfect conditions to expand solar energy for a sustainable energy supply for the island! © 2019 The World Bank

4. What makes Madagascar an excellent destination for projects?

The most exciting feature of the solar market in Madagascar is the huge solar potential in combination with the huge demand for renewable energy generally, and specifically, the opportunity to transition solar energy from mere energy production to agriculture and specifically, the food industry, as well as tourism. Both the location of the island and the way the energy grid is organized enable to build a solid portfolio to the benefit of our investors and the local community.


5. How are these future plans relevant to our investors?

It feels great to be able to offer so many advantages to our community of impact investors! We usually have different investors with individual reasons to invest in projects. For instance, we have many impact investors who really care about investing in the life of our energy consumers and get involved in the development of our target countries. In Madagascar, there is an incredibly high demand for electrification, and we are targeting dirty diesel generators to be replaced with affordable, reliable, and clean solar energy which provides the opportunity to utilize our impact investors’ contribution in the best way possible. On top of that, our impact investors are interested in sustainable profit. By selling our electricity to off-grid clients who are currently dependent on expensive diesel as the only source of electricity, we have a unique opportunity to maximize the profit for both our investors and our energy consumers!


Only 16% of the population on Madagascar have access to electricity. The expansion of renewable energies us a high priority for the government of Madagascar. Photo by gemmmm on Unsplash

Only 16% of the population on Madagascar have access to electricity. The expansion of renewable energies us a high priority for the government of Madagascar. Photo by gemmmm on Unsplash

Mehr als Stromerzeugung: Wie Sicherheit und Perspektiven in lokale Arbeitsmärkte in Uganda bringt.

GRS Commodities Limited ist ein lokales ugandisches Unternehmen, das Flockeneis für Inselgemeinden des Viktoriasees (Kalangala-Insel) sowie für die Bukasa-Insel produziert. Im Rahmen der Zusammenarbeit mit sind mehrere Projekte geplant, dazu bald mehr! Im Interview mit Andrew Ssentongo erfahren Sie, warum es bei um mehr geht, als um Stromerzeugung. Andrew Ssentongo ist der CEO GRS Commodities Ltd, Betreiber Mweena Ice Flake Manufacturing Site, Uganda.

1. Wo werden die Projekte umgesetzt und warum gerade an diesem Standort?

Die Solaranlagen werden für Inselgemeinden des Viktoriasees errichtet. Aufgrund ihrer abgelegenen Lage besteht für die betroffenen Gemeinden normalerweise kein Zugang zu nationalen Stromlieferungen, stattdessen bestehen unzureichende, lokale Mini-Grids, bzw. Inselsysteme für die Stromerzeugung. Verlässliche Energielieferungen werden hier besonders benötigt, für die Dörfer an sich, als auch für die Fischproduktion.

In den Jahre 2010-2015 haben wir zunächst versucht, Energie aus Biomasse zu gewinnen, weil die natürlichen Gegebenheiten hierfür an sich gut sind. Allerdings hat sich diese Art der Energiegewinnung als nicht sehr erfolgversprechend herausgestellt. Das Umschwenken auf Solarenergie war deshalb die naheliegendste Lösung.

2. Was zeichnet die lokale Situation aus, welche Problemstellung gibt es?

90% der ansässigen Bevölkerung bestreitet ihren Lebensunterhalt mit der Fischerei. Der Fisch muss natürlich frisch verkauft werden, dementsprechend wichtig ist es, die Ware adäquat zu lagern, bzw. zu kühlen. Zur Kühlung des Fisches wird Flockeneis benötigt.

Das Problem: Die meisten Eisfabriken sind auf dem Festland, in Kampala und Entebbe, ansässig. Die Fischer müssen also täglich eine lange Anreise machen, um beispielsweise in Kampala das Eis zu holen und wieder zu den Inseln zurück zu fahren. Das dauert – je nach Lage der Heimatinsel – vier bis sechs Stunden am Tag. Sehr ineffektiv!

3. Welche Lösung bietet die Zusammenarbeit mit

Die Lösung liegt darin, das Flockeneis direkt vor Ort kostengünstig zu produzieren. Die Anlagen hierfür sind zwar vorhanden, aber angesichts des derzeit auf der Insel verfügbaren teuren Stroms ist diese Erweiterung jedoch wirtschaftlich nicht realisierbar und das Produkt kann somit nicht zu einem angemessenen Preis an den Endverbraucher verkauft werden.

Damit Vor-Ort-Produktion also überhaupt möglich ist, muss es eine Lösung geben, die sowohl verlässlich Strom liefert, als auch in einem finanziellen Rahmen umsetzbar ist. Genau hier setzt die Zusammenarbeit mit an.

Durch unsere beiden Projekte, die jetzt in der Umsetzung sind, können wir an zwei Standorten vorankommen: Die Erweiterung der Eisproduktion in Mweena und die Aufnahme der Eisproduktion in Kisaba. In Kisaba konnten wir nämlich, aufgrund der vorhandenen Belastung der Haushalte und der Gemeinde, also mangels Strom, die Eisflockenanlage bislang gar nicht betreiben.

Aufgrund der Abhängigkeit der Einwohner von der Fischproduktion, sind die positiven Auswirkungen auf den lokalen Arbeitsmarkt enorm: Alleine an diesen Standorten profitieren rund 80-100 Fischer direkt von den Verbesserungen.

4. Welche Perspektiven sehen Sie für die Zukunft?

Aus vielen Gesprächen mit Menschen und Unternehmen vor Ort wissen wir, dass das Bewusstsein für die Vorteile der Solarenergie steigt. Den Menschen wird immer klarer, wie wichtig es ist, Energie umweltfreundlich zu erzeugen.

Gleichzeitig ist klar: Die Reduzierung von Kosten ist und bleibt ein zentrales Thema für Unternehmen, wobei die Energiekosten den größten Anteil an diesen Kosten haben. Für beide Themen ist Solarenergie die Lösung.

5. Warum sollten Menschen in investieren?

Die Frage, wie Solarenergie zu finanzieren ist, ist für die Menschen vor Ort DAS zentrale Thema. Denn auch wenn das Bewusstsein dafür, dass umweltschonende Energieerzeugung wichtig ist, steigt, muss es für Firmen auch finanzierbar sein. Und das ist die bislang größte Hürde. unterstützt diese Entwicklung, in dem eben diese ganz wesentliche Hürde der Finanzierung genommen wird. Während es natürlich auch andere Solar-Anbieter gibt, ist das einzigartig und ermöglicht einen deutlich leichteren Zugang zu Solarenergie. Hier vor Ort ist dieses Konzept neu und besonders, denn normalerweise muss zunächst in die Anlagen investiert werden, die Anlagen also gekauft werden, um vor Ort Strom produzieren zu können. Dieser Part entfällt durch die Zusammenarbeit mit und ermöglicht es lokalen Unternehmen, ohne Umwege direkt von Solarenergie zu profitieren.

Der Bedarf an solchen Projekten ist groß und so haben wir selbst und uns zum Ziel gesetzt, in den nächsten fünf Jahren Projekte mit rund 15 MWp zu realisieren. Das ist sicher ein sehr sportliches Ziel, aber es ist auch erreichbar, denn die Menschen haben verstanden, wie wichtig Solarenergie ist.