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OffGrid Thinker

Off the grid greenhouse

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I have a question about the greenhouse. The way I understand you are building off the grid community. How will that work with a greenhouse? In your video, I can see that you will have solar panels on top of a greenhouse, but aquaponics requires lots of energy. I think that it will not be enough to run everything just on solar. Thanks in advance for your answer.

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Yes, usually greenhouses consume a lot of energy. However, there are many ways to lower the consumption need.

I currently live in a house that is completely powered by solar panels, and we are even selling the surplus to the grid. For our heating needs, we are using a geothermal system. We use solar water heating panels to heat the water in the water heater.

Similar systems will be used for the greenhouse. It is much more effective to control the temperature in the greenhouse by heating or cooling the water in the aquaponics beds using geothermal system vs. conventional ways of doing it.

We would like to hear your ideas on how to build an off-grid greenhouse. Does anyone know any other effective ways to do it?

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An off the grid greenhouse is a very good idea. High prices of high-quality organic food reflect much more than the cost of growing. A large portion of it is shipping, transportation, and energy costs as well as distribution markups. An off the grid greenhouse set up cancels out all of those unnecessary expenses. And this becomes truly an "eat local" deal.

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Usually temperature spikes during the day and drops during the night. The easiest and most affordable way to stabilize the temperature in the greenhouse is to use thermal mass. If you stack row of 55-gallon drums, filled with water on the north side of the greenhouse in direct sunlight it will work like a heat battery. During the day drums will absorb lots of heat and will release that heat slowly during the night. Water has the ability to hold much more heat than any other material. Plus it is very practical using water in drums. They could be removed or moved quickly. This method helps to manage free energy - sun On the other side, I don't know if you will need this because aquaponics system already has lots of water in fish tanks and growing containers. The whole system should hold a pool of water. Maybe that will be enough; I don;t know. Keep us posted how it goes.

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Check out Ceres. They've built a pretty cool mostly-passive system for regulating temperature with underground tubes. How it's done depends on how close groundwater is to the surface and it can be helpful to sink the green house a bit in order to use the earth to regulate. But with their system it isn't necessary, just optional.
https://ceresgs.com/

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