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--- en:tech:solarvilla [2023/04/16 08:20] – [Wiring] bullar
+++ en:tech:solarvilla [2023/04/16 08:30] (current) – [Donations] bullar
@@ Line 614: / Line 614: @@
 ++++
+The GROWATT Inverter can be integrated directly into Home Assistant via [[https://www.home-assistant.io/integrations/growatt_server/|Integration]].
+===== Operation and Costs =====
+The plant has been in operation since March 2022 and generates between 430KW and 500KW per month depending on the weather. The best day so far was in March with 24KW and the worst with 1.2KW in November. However, October and November are also the months with the most precipitation (see [[de:tech:rainsensor|rain sensor]]).
+{{ :tech:solar_generation_chart.png?direct&400 |Solar production 2022}}
+The specified values are not the really achievable ones, since the inverter regulates down when the batteries are full and the house demand is below the current production capacity. What should he do with the energy if nobody can take it. We have observed this effect a few times. Nevertheless, the solar panels are only completely self-sufficient in sunny weather. On average, we draw additional energy of approx. 100..200KW/month from the grid because our AirBnB guests keep the air conditioning in the guest room running almost continuously, which means that consumption is higher than forecasted above.
+With an approximate average of 450KW/month, this results in an annual production output of 5,400KW. One kilowatt hour costs us 7 baht/19 ct (1€ = ~37 baht), so we save approx. €1,021 (€85 per month)**.
+The entire solar system without the service line and roof substructure cost us **206,000 Bath**, which is **€5,567**. The work output was my own that kept me meaningfully engaged during the pandemic, so I'm not counting it. I don't count the steel substructure for the carport either, since it was necessary anyway to cover our //fleet// (motor scooters and car). Incidentally, the local offers for a comparable system were more than twice as high (but then with wages).
+From today's point of view, the system will pay for itself after about 5 ½ years, assuming there are no maintenance or repair costs. The goal envisaged above has thus been easily achieved. The first thing to do is to replace the batteries. With around 4000 cycles, that would be after 10 years and the solar panels would be down to 85% performance after 25 years. The future will show how and whether the values will really be achieved.
+Not to be forgotten, however, is the increase in comfort in the event of a grid failure when the neighbors have to fiddle with torches and candles, as well as the really good feeling of using solar energy when you turn on the air conditioning...
+Finally, the charging and discharging chart over three days. The batteries are charged from around 7:00 a.m. to around 6:00 p.m., after which the discharge begins. If the charge falls well below 20%, the grid will charge. Shown by the linear increase on the first and last night.
+{{ :tech:solar_charge.png?direct&400 |Solar battery charge/discharge}}
+=====Links=====
+   * [[https://www.home-assistant.io]] Home Assistant
+   * [[https://esphome.io]] ESPHome
+   * [[https://airbnb.com/h/villarollokohsamui]] You can spend your holidays with us...
+===== Donations =====
+If you want to support my work, you can donate me a cappuccino or something like this...
+<html>
+<form action="https://www.paypal.com/donate" method="post" target="_top">
+<input type="hidden" name="hosted_button_id" value="49N24HL36GF9U" />
+<input type="image" src="https://www.paypalobjects.com/en_US/DK/i/btn/btn_donateCC_LG.gif" border="0" name="submit" title="PayPal - The safer, easier way to pay online!" alt="Donate with PayPal button" />
+<img alt="" border="0" src="https://www.paypal.com/en_DE/i/scr/pixel.gif" width="1" height="1" />
+</form>
+</html>

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