ᐅ Photovoltaic Systems: Advantages, Disadvantages, Experiences, and Is It Worthwhile?
Created on: 9 Jul 2014 11:42
F
Fortuna86
Hello,
I would like to know your opinions on the topic of photovoltaic systems.
The plan is for a house with 140 sqm (1507 sq ft) with a south-facing roof.
Is financing such a system worthwhile?
What are your personal experiences in this area?
Do you have to feed the electricity into the grid, or is it allowed/possible to use it yourself?
Are there any special incentives or subsidies available?
What disadvantages does installing such a system have (please don’t mention “appearance”)?
I would like to know your opinions on the topic of photovoltaic systems.
The plan is for a house with 140 sqm (1507 sq ft) with a south-facing roof.
Is financing such a system worthwhile?
What are your personal experiences in this area?
Do you have to feed the electricity into the grid, or is it allowed/possible to use it yourself?
Are there any special incentives or subsidies available?
What disadvantages does installing such a system have (please don’t mention “appearance”)?
Bookstar schrieb:
How can you achieve 50% self-consumption without a battery?Achieving 50% self-consumption without storage is quite high. With a south-facing system, we get about 30%. We try to run heavy appliances like the washing machine or dishwasher around midday whenever possible.
It can be slightly better with east/west systems, as more power is available in the morning and evening. However, the overall energy and power yield of east/west systems is lower than that of south-facing systems.
B
Bau_Bambi22 Feb 2019 12:16Our architect said that the overall energy output throughout the day is roughly the same.
With a south-facing orientation, you get a higher peak output, but you also need to schedule all devices (more effort?), and efficiency drops because the panels get warmer.
With east/west orientation, energy is generated when it’s needed; although the peak isn’t as high, the power supply is more consistent.
A compromise could be to use a battery that charges during midday and then powers all devices in the evening.
Alternatively, installing solar panels on three roof surfaces without increasing the system size—does that make sense in terms of effort if the system stays below 10 kWp?
With a south-facing orientation, you get a higher peak output, but you also need to schedule all devices (more effort?), and efficiency drops because the panels get warmer.
With east/west orientation, energy is generated when it’s needed; although the peak isn’t as high, the power supply is more consistent.
A compromise could be to use a battery that charges during midday and then powers all devices in the evening.
Alternatively, installing solar panels on three roof surfaces without increasing the system size—does that make sense in terms of effort if the system stays below 10 kWp?