PV systems

Buy a photovoltaic system and permanently reduce your electricity costs

If you're looking to buy a photovoltaic system, you'll benefit from measurable savings on your energy costs. Modern solar systems convert sunlight directly into electrical energy, giving you greater energy independence. At PVundSO, you'll find complete systems ranging from 3 kW to 20 kW, tailored to different consumption profiles. An average four-person household consumes approximately 4.500 kWh annually and requires a system with a minimum output of 4,5 to 5 kW for optimal self-sufficiency.

Investing in a photovoltaic system is worthwhile not only for its environmental benefits. Concrete calculations show that systems with a capacity of 5 kW pay for themselves within 8 to 10 years at current electricity prices. The higher your current grid electricity consumption, the faster you will reach the break-even point. Purchasing solar panels means long-term planning security, as the technology requires minimal maintenance and operates for 25 years or more. Your monthly energy costs will decrease immediately after commissioning, while the initial investment is offset over the years by savings on electricity bills.

Complete solar system for maximum energy independence

When you purchase a solar system from PVundSO, you receive well-designed complete packages with all the necessary components. Each set includes bifacial solar modules from JA Solar, which utilize sunlight from both sides, resulting in up to 30% higher yields compared to conventional modules. The integrated inverters from Solis or Sofar achieve efficiencies of over 97% and convert the generated direct current into usable alternating current with virtually no loss. MC4 extension cables and mounting hardware are included, so you don't need to order any essential components separately.

Your energy independence increases significantly when you purchase a complete solar system that matches your actual needs. A single-person household with an annual consumption of 1.500 kWh can manage with a 3 kW system, while multi-family homes or small businesses require systems with 10 to 20 kW. The self-consumption rate is a crucial factor in determining profitability. Without battery storage, it typically ranges from 30 to 35%; with storage, you can achieve rates of 60 to 70%. At an electricity price of 35 cents per kWh, a 5 kW system with 60% self-consumption will save you approximately €900 to €1.200 annually. These savings multiply over the system's entire lifespan, making the purchase a worthwhile investment.

Buy a solar system at a low price with a short payback period

Anyone looking to buy a solar power system at a good price should pay attention to the ratio between purchase price and projected energy production. At PVundSO, entry-level systems with 3 kW output start in the four-figure range, while more powerful systems with storage are correspondingly more expensive. The payback period depends on several factors. A 5 kW system without storage costs an average of €5.000 to €7.000 and, with optimal south-facing orientation, generates approximately 4.750 kWh annually. With 35% self-consumption and electricity costs of 35 cents per kWh, this results in annual savings of around €580, leading to a payback period of approximately 9 to 12 years.

With battery storage, the calculation changes significantly. The higher initial costs of approximately €8.000 to €10.000 for a 5 kW system with 5 kWh storage are offset by increased self-consumption of up to 70%. Your annual savings rise to around €1.150, reducing the amortization period to 7 to 9 years. Buying a PV system at a good price doesn't necessarily mean choosing the smallest system, but rather finding the optimal balance between investment and benefit. Bifacial modules achieve 10 to 15% higher yields than standard modules due to their double-sided light absorption, further improving economic efficiency. This technology utilizes reflected light from bright roof surfaces or gravel beds on flat roofs, thus increasing overall output without requiring additional space.

Complete PV system with inverter and storage

When you purchase a complete PV system, you ideally receive a system with a hybrid inverter and expandable battery storage. The inverter performs two key functions. It converts the direct current (DC) generated by the solar panels into grid-compliant alternating current (AC) at 230 volts and simultaneously controls the charging and discharging of the battery storage. Modern hybrid systems use intelligent algorithms that optimize the energy flow between the panels, storage, household consumption, and the grid. Excess electricity first flows into the battery storage. Only when the battery is fully charged is the excess power fed into the public grid.

Battery storage systems from Pylontech or Sofar offer capacities between 4,8 kWh and 20 kWh, which can be expanded modularly. For a four-person household, a storage size of 5 to 7 kWh is recommended to cover self-consumption during the evening and night hours. The lithium-ion technology achieves over 6.000 charge cycles at a depth of discharge of 90%, which corresponds to a service life of more than 15 years. When you purchase a complete PV system with storage, you often also integrate emergency power functions that ensure a limited basic supply in the event of a grid outage. The standby consumption of modern storage systems is less than 10 watts, resulting in minimal losses. You can retrofit additional battery modules at any time if your electricity demand increases or you aim for a higher degree of energy independence.

Buy a complete photovoltaic system package for any roof size

Regardless of your available roof area, you can purchase a suitable complete photovoltaic system package. Small roofs from 15 m² are suitable for 3 kW systems with 8 bifacial modules, each requiring approximately 1,9 m² of space. Medium-sized roofs of 30 to 40 m² offer space for 6 kW systems with 14 to 16 modules, while large commercial roofs or apartment buildings can accommodate systems with 15 to 20 kW and up to 48 modules. The module layout takes into account skylights, chimneys, and dormers. For complex roof geometries, PVundSO creates customized layout plans that guarantee optimal use of space.

Roof size	Number of modules	Plant performance	Annual yield (approx.)	fitness
15-20 m²	8 Module	3 kW	2.850 kWh	Single-family house (1-2 people)
25-35 m²	12-14 modules	5-6 kW	4.750-5.700kWh	Single-family house (3-4 people)
40-60 m²	20-24 modules	8-10 kW	7.600-9.500kWh	Large detached house / commercial property
80-100 m²	40-48 modules	17-20 kW	16.150-19.000kWh	Apartment building / Commercial

This table shows realistic yields for a south-facing roof with a 30° pitch in Germany. Deviations to the east or west reduce the yield by approximately 10 to 15%, while north-facing roofs are generally unsuitable. Flat roofs require mounting structures with an optimized tilt angle, which increases the required surface area. For each kilowatt peak, you can expect to need approximately 8 to 10 m² of surface area on flat roofs.

When you buy a solar system online from PVundSO, you receive mounting brackets for tile and flat roofs, as well as facade fixings, as optional accessories. Tile roof brackets use roof hooks that grip under existing tiles and do not require large roof openings. Flat roof systems utilize ballast or mounting trays that do not require roof penetration. Installation by a qualified professional ensures compliance with building regulations and preserves warranty claims. Those wishing to purchase a solar power system can also request contact information for qualified installation partners from PVundSO, who carry out installation and electrical commissioning according to VDE standards. Professional wiring with appropriate cross-sections minimizes line losses and ensures system safety.