@@ -15,7 +15,7 @@ Photographer [Detlef](https://hee.se) paid them a visit.
1515## From Solar Thermal to Solar PV
1616
1717** Michael (evcc):** Hi Michael, hi Markus, great that you're taking the time.
18- A large boathouse roof: that's just begging for solar panels.
18+ A large boathouse roof: that's perfect for solar panels.
1919How did you convince the club to invest?
2020
2121** Michael (ORV):** We had a solar thermal system on the roof until a few years ago, but it suffered total economic failure.
@@ -29,15 +29,15 @@ That convinced the members.
2929** Michael (evcc):** How much of the roof area have you been able to cover?
3030
3131** Markus (ORV):** Currently only about a quarter of the roof area is covered with a 30 kWp system.
32- But legally we're not allowed to install more , and technically we're already maxing out the connection, at least theoretically .
33- If regulations change accordingly , we'd like to expand the system ourselves through volunteer work.
32+ But we can't install more due to regulations , and we're already maxing out the grid connection .
33+ If that changes , we'd like to expand the system ourselves through volunteer work.
3434
3535## Hot Water for Dozens of Rowers
3636
3737** Michael (evcc):** How did evcc come into play?
3838Were there alternative considerations?
3939
40- ** Michael (ORV):** Our first chairman controlled his home solar system with evcc quite quickly, the initial experiences were positive.
40+ ** Michael (ORV):** Our first chairman was already using evcc at home for his solar system, and the experiences were positive.
4141It made sense to use it at the club too.
4242
4343** Michael (evcc):** And what does your technical setup look like?
@@ -46,36 +46,35 @@ It made sense to use it at the club too.
4646Each installed in a hot water storage tank.
4747The software runs on a repurposed Dell PC that consumes a frugal 15 W.
4848Proxmox is installed on it, Home Assistant runs in a VM and evcc in a container.
49- Additionally, we massively expanded our network last year to have a stable and future-oriented system.
49+ We also upgraded our tech infrastructure last year for a stable and future-proof system.
5050
5151![ Michael with Sungrow inverter and battery] ( ./orv-sungrow-speicher.webp )
5252
53- ** Michael (evcc):** How many people shower on a typical day with your solar heating element?
54- Has the water ever been too cold?
53+ ** Michael (evcc):** How many people shower on a typical day with your solar heating element and has the water ever been too cold?
5554
56- ** Michael (ORV):** Hard to say how many people shower per day.
55+ ** Michael (ORV):** It's hard to say how many people shower per day.
5756Since we installed water-saving heads and timers, they definitely shower for less time.
58- That benefits the gas savings.
57+ That benefits our gas savings.
5958The water can't get too cold because we have a gas heater that warms the water as soon as it drops below 36°C.
6059
6160![ My-PV AC-Thor display] ( ./orv-mypv-thor-display.webp )
6261
6362## 5,742 kWh of Gas Saved
6463
65- ** Michael (evcc):** Can you already say how much gas has been saved through the heating elements?
64+ ** Michael (evcc):** Can you already say how much gas has been saved through your heating elements?
6665
6766** Markus (ORV):** We can analyse the consumption per heating element with Home Assistant.
6867By mid-September, we'd heated water with at least 5,742 kWh of solar electricity.
69- That should correspond to roughly the same amount of gas.
68+ That should correspond roughly to the same amount of gas.
7069Since we're still in the testing phase, we don't have long-term experience yet.
7170
7271![ evcc interface on smartphone] ( ./orv-evcc-interface.webp )
7372
7473** Michael (evcc):** Would you still have electricity left over for a members' wallbox or other consumers?
7574
7675** Michael (ORV):** We currently feed the surplus into the grid.
77- Since the heating elements were commissioned, however, it 's not so abundant that it would be worthwhile for significant battery charging at present .
78- We've already planned for wallboxes though .
76+ Since the heating elements went live, there 's not enough surplus left to make battery charging worthwhile .
77+ But we're already planning to install EV chargers in the future .
7978
8079![ evcc diagram] ( ./orv-diagram-en.svg )
8180
@@ -111,7 +110,10 @@ To preserve the battery and for grid-friendly feed-in, throttling the charging p
111110
112111![ Michael in technical room with hot water storage] ( ./orv-warmwasserspeicher.webp )
113112
114- ** Michael (evcc):** Those are good suggestions.
113+ ** Michael (evcc):** Thanks for the great suggestions.
114+ Since evcc started with EV charging, we still have a lot to improve when it comes to heating use-cases.
115+ But there are things to come in the future.
116+
115117Thanks for the insights into your energy world at the rowing club.
116118It nicely shows how evcc can work in larger community facilities too!
117119
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