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Frequently Asked Questions
How does a photovoltaic system work and which components do I need
How does a photovoltaic system work and which components do I need
A PV system converts sunlight into direct current via solar modules. An inverter converts this into grid-compliant alternating current and controls the feeding process. A mounting system fixes the solar panels to the roof, facade, or flat roof. Optionally, home storage systems, smart meters, and energy management increase self-consumption. Cables, DC connectors, and surge protection complete the system.
Welche Photovoltaik-Produkte bekomme ich bei Terra Energy?
Welche Photovoltaik-Produkte bekomme ich bei Terra Energy?
Bei Terra Energy finden Sie Solarpanele, Wechselrichter, Balkonkraftwerke, Heimspeicher, Powerstations, Smart Meter, Ladestationen, Wärmepumpen, Notstromboxen, Energie- und Verbindungskabel, Adapter, Halterungen und Montagezubehör. Dadurch lassen sich einzelne PV-Komponenten oder komplette Solarstromlösungen für private, gewerbliche und mobile Anwendungen zusammenstellen.
Warum ist Terra Energy für Solarbetriebe und Installateure interessant?
Warum ist Terra Energy für Solarbetriebe und Installateure interessant?
Solarbetriebe und Installateure profitieren bei Terra Energy von einem herstellerunabhängigen Sortiment, persönlicher Fachberatung, schnellen Angebotsprozessen, festen Ansprechpartnern und kompatiblen Komplettlösungen aus einer Hand. Das ist besonders wichtig, wenn PV-Module, Wechselrichter, Speicher, Smart Meter und Montagezubehör technisch sauber aufeinander abgestimmt werden müssen.
How much electricity does a solar power system provide per year
How much electricity does a solar power system provide per year
The yield depends on location, orientation, shading, and module performance. In Germany, well-planned photovoltaic systems often achieve between 850 and 1100 kilowatt-hours per kilowatt-peak. South and East-West orientations deliver similar annual energy but differ in daily distribution. An inverter with a suitable MPP voltage window ensures efficiency. Monitoring helps compare real values with the yield forecast.
When is a home energy storage system combined with PV worthwhile?
When is a home energy storage system combined with PV worthwhile?
A battery storage system increases self-consumption and reduces grid purchases in the evening hours. It is economically viable if load profiles are high in the evenings or if heat pumps and wallboxes utilize PV surpluses. Important key figures are usable kilowatt-hours, C-rate, and cycle stability. AC-coupled storage systems are suitable for retrofitting, while hybrid inverters integrate the storage system at the DC level in new constructions. Intelligent energy management optimizes charging times and self-sufficiency.
What are the legal aspects of balcony power plants and small PV systems
What are the legal aspects of balcony power plants and small PV systems
Plug-in solar devices up to 800 watts AC are permissible in Germany; the module output per device can be higher. Registration in the market master data register is required. Many grid operators accept operation until the meter is replaced, after which a bidirectional meter is usually installed. An energy plug connector is recommended. Our kits include suitable solar panels, inverters, and connection accessories.
Which roof areas are suitable and how does shading affect performance
Which roof areas are suitable and how does shading affect performance
Suitable are pitched roofs, flat roofs with elevated mounting, and facades. East-west distribution spreads the power output over the day and reduces roof ballast on flat roofs, while south-facing maximizes midday peaks. Partial shading reduces yield; module optimizers or shade-tolerant string planning help. Pay attention to wind and snow loads, fire protection, and corrosion-resistant mounting materials. A static check is advisable for large systems.
How do solar modules differ technologically
How do solar modules differ technologically
Monocrystalline modules with PERC, TOPCon or HJT dominate due to high efficiencies. Glass-glass variants offer better long-term stability and often longer product and performance warranties. Bifacial panels utilize diffuse radiation via the rear, which brings higher yields on light-colored surfaces. Full-black modules provide a homogeneous design with a similar performance class. Datasheets state nominal power, temperature coefficient, and warranties.
How do I size the system in relation to consumption, wallbox, and heat pump?
How do I size the system in relation to consumption, wallbox, and heat pump?
The starting point is the annual electricity demand, including planned consumers. For households with electric vehicles and heat pumps, a higher generator output is recommended to ensure sufficient PV surplus during the day. The inverter is sized close to the DC power and can be slightly undersized to improve partial load efficiencies. A smart meter controls consumers according to PV generation, increasing the self-consumption rate without loss of comfort.
What costs, grants, and tax rules should I be aware of?
What costs, grants, and tax rules should I be aware of?
The total cost is comprised of the solar panels, inverter, mounting system, storage, and installation. In Germany, many PV products are exempt from sales tax, which simplifies procurement. Regional programs sometimes subsidize home storage systems, wallboxes, or green roofs in combination with photovoltaics. Economic viability is assessed based on specific investment costs per kilowatt-peak, full costs over the lifetime, and the levelized cost of electricity. Our team provides a project-specific calculation with a bill of materials and yield forecast upon request.


