Our PV system project already started last November, when 14.1 kWp of solar panels were installed on our roof. Unfortunately, the supply situation for inverters and storage systems was very tight, so we had to wait for some time. However, this was bearable over the winter months, as these are the lowest-yield months of the year anyway. Since our system will therefore only be completed in 2023, we can take advantage of the abolition of VAT on PV components without bureaucratic hurdles.
⚠ [affiliate] Keine Produkte mit Cache für e-auto.
Bitte affiliate-sync --lang en ausführen.
Last week, however, the Sungrow SH10RT hybrid inverter, the Sungrow SBR096 storage system with 9.6 kWh and the brand new wallbox from the same company arrived.
Unfortunately, the empty conduits from the attic to the utility room, which were originally intended for a solar thermal system, could not be used for the PV cables. They were probably pinched or blocked somewhere, so even with fiberglass rods and a lot of trial and error, there was no way through. We quickly laid the cables in a stainless steel pipe in an inconspicuous niche on the outside of the house.
The Sungrow SH10RT inverter was quickly mounted and the cables can be connected without opening the device. In the distribution cabinet, the disconnection device, a dedicated smart meter and the wiring for backup power operation were prepared.
The Sungrow SH10RT hybrid inverter can automatically switch to backup power within just 20 ms during a power outage and supply the connected loads with up to 9.9 kW of 3-phase power from the storage system. If the storage system is empty, the inverter is black-start capable. This means that power is immediately available when the PV modules supply power again - even if the grid is still down.
At times when there is not enough PV power available for storage charging, you can keep the storage system at a minimum charge using grid power to be prepared for a power outage here as well. The battery storage therefore primarily serves not to increase self-consumption (and reduce unattractive grid feed-in), but above all for supply security during grid outages.
We will probably also upgrade our storage system with two more modules to a total of 16 kWh. The Sungrow SBR battery storage systems can be expanded at any time practically via “plug and play” and without any wiring effort.
There is now a new Sungrow wallbox on the outside of the garage. We already had the go-e Charger, but it was connected in the garage. With the external Sungrow wallbox, friends and relatives can now also charge conveniently, and a second electric car is probably on the horizon at some point. Electromobility has already fully arrived in our environment.
The Sungrow wallbox communicates with the inverter via an RS485 cable and can be set so that it only charges when there is excess PV power, for example, or always at full power if you urgently need more range. The charging process is enabled via RFID card or the app.
In the next few days, the electricians will come again and connect the inverter as well as the loads for backup power operation. The meter also needs to be replaced with a smart meter and the hybrid inverter needs to be configured. Then (hopefully) spring with lots of sunshine will be here and we can harvest electricity from our own generation for the first time. The iSolarCloud for monitoring is also already set up and connecting to Home Assistant should not be a problem either, as communication takes place via the ModBUS protocol.
Stay tuned for the next post when the system is connected to the grid and I have initial experiences and measurements!
Here are the links to
Part 1: We’re getting a PV system
Part 2: Our PV system is on the roof
Part 3: First experiences after 5 months
Hi! I'm Markus – the Fricklr. ⚡ Electrical engineer, 🎵 musician (bass, guitar, keys) and professionally 'something with the internet' 🌐 for over 30 years – nowadays with AI too 🤖 – a 55-year-old generalist from Bavaria, Germany.
Your feedback helps me write even more interesting posts. After "Yes" there's also a small option to support my work.
What do you think? Leave a comment!
Share your thoughts, questions or experiences with the community.