More and more families want to install PV arrays and battery storage systems. However, there are a number of truths about PV sytems that users must know before using.
Household demand for rooftop PV systems and residential batteries continues to grow. In order to meet the expectations of homeowners, It is necessary to clarify false expectations about PV installations that could disappoint prosumers.
The first misconception is that a PV system is only worthwhile in combination with a battery. Some homeowners seem to believe that feeding solar power into the grid is not a financially attractive option.
A photovoltaic system is financially worthwhile, even without storage. If installing a battery in addition to the photovoltaic system is feasible, it depends on a number of factors – mainly, a home's power usage and electricity costs. Homeowners should therefore check their self-consumption levels without storage. They can compare higher self-consumption levels through battery storage with actual electricity costs.
It is also should be rejected the idea that south-facing rooftops are always better for PV systems than east-west-facing rooftops. It's not just about generating as much solar power as possible, but generating electricity when it is needed. The annual yield of a PV system on an east-west roof is only around 80% compared to a south-facing roof. However, the yield from solar systems on east-west roofs can be spread over the course of an entire day, as the systems still get a significant amount of sun in the morning and evening.
Many people who do not have rooftops for PV installations often consider investments in plug-in solar devices. These can be attached to balconies or set up in gardens. This is also a good choice. These balcony panels are particularly suitable for covering the baseload – for example, for a telephone, an internet router, or an alarm clock radio in the household.
If more power is needed, it will be provided by the grid. This is the case, for example, with a air conditioner that briefly requires around 2,000W - 3000W. Balcony PV modules alone may not achieve this.
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