Off-grid system (without power connection)
Stand-alone systems are systems that are not connected to the mains. Choosing not to connect to the mains can have diverse reasons.
Mountain chalets are isolated and mostly do not have sufficient financial or energetic means to install, maintain or run a mains supply.
Mobile applications must do without a mains connection due to the nature of being mobile. Overhead cables, as found on railway lines, are elaborate and cost intensive to install and run.
A 100% energy supply of such systems is generally ensured by oversizing the energy generators and storage. Large solar surfaces in combination with an equally large energy storage already cause a corresponding CO2 footprint and costs during their construction. Such oversizing is particularly disadvantageous in the case of stand-alone systems, since surpluses cannot be fed into the grid due to the fact that these systems are not tied to the grid. For this reason, financial amortization is just as unsuccessful as a positive C02 balance.
In regard to the carbon footprint, it is necessary to keep costs low even during the production. An all-round security of energy supply (100% energy self-sufficiency) requires careful consideration during the design phase. This can happen through diversification of energy production (solar, wind, water). Intermittent absence of the necessary elements (light, wind, water) means dependency on the energy storage to guarantee supply. In order to reduce the cost and CO2 of the storage/Battery to an acceptable level, makeshift solutions are almost inevitable.
Electricity supply fur mountain chalets and decentralised buildings (stand-alone systems)
The connection to a mains supply is not affordable?
Mebrex suggests a solution that combines the advantages of existing systems (Fig. 1) whilst avoiding most of their disadvantages.
The system consists of solar panels in combination with a smaller battery and a small but very special patented Mebrex generator.
Mebrex enhances the system with its small patented generator which is only activated to avoid the battery becoming flat. Therefore, a costly black start generator is also avoided. This is all executed fully automatically (auto start-stop)!
Alongside the savings in total installation costs, due to the smaller battery and a lower number of solar panels, further reduced costs can be realised as well as a smaller carbon footprint. Additional CO2 is only produced at low levels during extended power failures.
✅ Best solution for a green image through the use of renewable energy (what is possible, not only what is necessary)
✅ A clear and palpable solution
✅ Minimal installation costs via smaller components
✅ Scalable for diverse application sizes
✅ CO2 free during short power failures
✅ During long power failures the generator runs to the minimum required (auto start-stop)
✅ Use of low CO2 fuels (E-Fuels) in development