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en:tech:solarvilla [2023/04/16 08:15] – [Battery] bullaren:tech:solarvilla [2026/08/12 12:15] (current) – external edit 127.0.0.1
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 The sun's energy reaches a daily average intensity of around 165 W/m² on the earth's surface. This can be used directly with photovoltaic systems. In Germany, the annual radiation output (GHI = Global Horizontal Irradiation) is about 1,056kWh/m² and in my adopted country of Thailand it is around 1,800kWh/m² per year. This data can be found in [[https://globalsolaratlas.info/map|GLOBAL SOLAR ATLAS]]. The sun's energy reaches a daily average intensity of around 165 W/m² on the earth's surface. This can be used directly with photovoltaic systems. In Germany, the annual radiation output (GHI = Global Horizontal Irradiation) is about 1,056kWh/m² and in my adopted country of Thailand it is around 1,800kWh/m² per year. This data can be found in [[https://globalsolaratlas.info/map|GLOBAL SOLAR ATLAS]].
  
-{{ :tech:ghi_world.png?direct&400 | GHI Worldwide}}+{{ :media:tech:solarvilla:ghi_world.png?direct&400 | GHI Worldwide}}
  
 In addition to the fact that there is enough solar energy here in Thailand for use, the reliability of the local power supply (grid) leaves a lot to be desired. The electricity is often cut off for a few hours in heavy rain or when repair work is being carried out. Stupid because our water pump also needs electricity. The greatest possible independence from the grid would be a clear gain in convenience. There is (so far) no reimbursement system like in Germany here in Thailand. The roofing of the carport was the third argument. After all, it rains heavily here or in the blazing sun the (black) car roof reaches a temperature of over 80°C. In addition to the fact that there is enough solar energy here in Thailand for use, the reliability of the local power supply (grid) leaves a lot to be desired. The electricity is often cut off for a few hours in heavy rain or when repair work is being carried out. Stupid because our water pump also needs electricity. The greatest possible independence from the grid would be a clear gain in convenience. There is (so far) no reimbursement system like in Germany here in Thailand. The roofing of the carport was the third argument. After all, it rains heavily here or in the blazing sun the (black) car roof reaches a temperature of over 80°C.
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 An important parameter is the required power that the new solar system should provide. To estimate one should roughly know the consumption values of your own household. In [[de:tech:powermeter|PowerMeter]] I have already described how to record the power consumption. Here is an example of the daily consumption in our house: An important parameter is the required power that the new solar system should provide. To estimate one should roughly know the consumption values of your own household. In [[de:tech:powermeter|PowerMeter]] I have already described how to record the power consumption. Here is an example of the daily consumption in our house:
  
-{{ :tech:consumption_villa_.png?direct&500 |Daily Consumption (ex.)}}+{{ :media:tech:solarvilla:consumption_villa_.png?direct&500 |Daily Consumption (ex.)}}
  
 In addition to the air conditioning, the main consumers are of course thecirculation pump of the pool. The total consumption of this sample day was 18.8kWh. Typically, our daily consumption is between 15kWh and 25kWh. Almost half (45%) of this amount is at night (6:00 a.m. to 6:00 p.m.). The current maximum power requirement is around 5kW. In the worst case, however, this can go up to over 10kW if all 4 air conditioning systems, the pool and dwell pump, washing machine, water heater, etc. are in operation at the same time. However, 14.5kW is the maximum anyway, since the house is only connected to the grid with single phase and maximum of 63A. In addition to the air conditioning, the main consumers are of course thecirculation pump of the pool. The total consumption of this sample day was 18.8kWh. Typically, our daily consumption is between 15kWh and 25kWh. Almost half (45%) of this amount is at night (6:00 a.m. to 6:00 p.m.). The current maximum power requirement is around 5kW. In the worst case, however, this can go up to over 10kW if all 4 air conditioning systems, the pool and dwell pump, washing machine, water heater, etc. are in operation at the same time. However, 14.5kW is the maximum anyway, since the house is only connected to the grid with single phase and maximum of 63A.
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 In recent years, the efficiency of solar panels has increased from 15% to over 20%. The efficiency mainly depends on the cell design as well as on the cell layout. Here is an overview of the most common versions: In recent years, the efficiency of solar panels has increased from 15% to over 20%. The efficiency mainly depends on the cell design as well as on the cell layout. Here is an overview of the most common versions:
  
-{{ :de:tech:solar_panels.png?direct&400 |Comparison}}+{{ :media:tech:solarvilla:solar_panels.png?direct&400 |Comparison}}
  
 My choice, also in terms of price and availability, felt on ''Half-cut mono PERC MBB'', i.e. a monocrystaline module with __M__ulti __B__ar __B__us which, according to the manufacturer, achieves an efficiency of 21.2%. My choice, also in terms of price and availability, felt on ''Half-cut mono PERC MBB'', i.e. a monocrystaline module with __M__ulti __B__ar __B__us which, according to the manufacturer, achieves an efficiency of 21.2%.
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 === Orientation === === Orientation ===
  
-The carport is oriented a little more to the west with a south azimuth of +15°. This value results in any hardly measurable losses in yield. The best angle of inclination for the panels depends on the location of the installation and depends on the southern high point of the sun. The data for this can be calculated with the help of [[https://SunEarthTools.com|Sun Earth Tools]]. Here the elevation for Dusseldorf (GER):+The carport is oriented a little more to the west with a south azimuth of +15°. This value results in any hardly measurable losses in yield. The best angle of inclination for the panels depends on the location of the installation and depends on the southern high point of the sun. The data for this can be calculated with the help of [[https://www.sunearthtools.com/index.php|Sun Earth Tools]]. Here the elevation for Dusseldorf (GER):
  
-{{ :tech:azimut_dus.png?direct&400 |Elevation}}+{{ :media:tech:solarvilla:azimut_dus.png?direct&400 |Elevation}}
  
 In Germany, the angle of inclination is between 30° and 40°. Here in Thailand, the midday sun is much more vertical and you get a maximum of 82° elevation. Incidentally, for the self-cleaning of the panels, you should take into account a tilt of at least 5°. Our carport roof has been given an incline of 6°, again due to the optics. In Germany, the angle of inclination is between 30° and 40°. Here in Thailand, the midday sun is much more vertical and you get a maximum of 82° elevation. Incidentally, for the self-cleaning of the panels, you should take into account a tilt of at least 5°. Our carport roof has been given an incline of 6°, again due to the optics.
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 <WRAP group> <WRAP group>
 <WRAP half column> <WRAP half column>
-{{ :tech:l-feed.png?direct&100|L-Feed}}+{{ :media:tech:solarvilla:l-feed.png?direct&100|L-Feed}}
 </WRAP> </WRAP>
 <WRAP half column> <WRAP half column>
-{{:tech:l-feet_mounting.png?direct&200 |}}+{{:media:tech:solarvilla:l-feet_mounting.png?direct&200 |}}
 </WRAP> </WRAP>
 </WRAP> </WRAP>
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 To seal the gaps, we need an UV-resistant EPDM sealing material. That turned out to be more difficult than expected. After a long research I found the company [[https://www.rinengsolar.com|https://www.rinengsolar.com]] in Taiwan via [[https://www.alibaba.com|Alibaba]], who produced 30m for me. The //EPDM Gasket// looks like this in cross section: To seal the gaps, we need an UV-resistant EPDM sealing material. That turned out to be more difficult than expected. After a long research I found the company [[https://www.rinengsolar.com|https://www.rinengsolar.com]] in Taiwan via [[https://www.alibaba.com|Alibaba]], who produced 30m for me. The //EPDM Gasket// looks like this in cross section:
  
-{{ :tech:edpm_gasket.jpeg?direct&200 |EPDM gasket}}+{{ :media:tech:solarvilla:edpm_gasket.jpeg?direct&200 |EPDM gasket}}
  
 and is simply clamped between the panels. There is also a suitable EPDM adhesive tape for sealing the crossing points. and is simply clamped between the panels. There is also a suitable EPDM adhesive tape for sealing the crossing points.
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 <WRAP group> <WRAP group>
 <WRAP half column> <WRAP half column>
-{{ :de:tech:end_clamp.png?direct&100|}}+{{ :media:tech:solarvilla:end_clamp.png?direct&100|}}
 </WRAP> </WRAP>
 <WRAP half column> <WRAP half column>
-{{:de:tech:mid_clamp.png?direct&120 |}}+{{:media:tech:solarvilla:mid_clamp.png?direct&120 |}}
 </WRAP> </WRAP>
 </WRAP> </WRAP>
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 <WRAP group> <WRAP group>
 <WRAP half column> <WRAP half column>
-{{ :tech:car_port_top.jpg?direct&400|}}+{{ :media:tech:solarvilla:car_port_top.jpg?direct&400|}}
 </WRAP> </WRAP>
 <WRAP half column> <WRAP half column>
-{{:tech:car_port_side.jpeg?direct&300 |}}+{{:media:tech:solarvilla:car_port_side.jpeg?direct&300 |}}
 </WRAP> </WRAP>
 </WRAP> </WRAP>
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    * Scalability up to 30kW in parallel operation    * Scalability up to 30kW in parallel operation
  
-{{ :tech:spf5000es.png?direct&500 |System overview}}+{{ :media:tech:solarvilla:spf5000es.png?direct&500 |System overview}}
  
 In Thailand I was able to get this variant for around €920. In Thailand I was able to get this variant for around €920.
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 Therefore, the choice felt on the LiFePO<sub>4</sub> batteries. We installed 16 LiFePO<sub>4</sub> modules with 3.2V/310Ah from CATL, all together results in a maximum storage capacity of 15.8KWh. This is well above the typical night-time consumption of 11.25KWh mentioned above and should therefore be sufficient. In terms of costs, this is the largest single item at €2.048, more expensive than the 10 solar panels. The source of supply was again ALIBABA. Therefore, the choice felt on the LiFePO<sub>4</sub> batteries. We installed 16 LiFePO<sub>4</sub> modules with 3.2V/310Ah from CATL, all together results in a maximum storage capacity of 15.8KWh. This is well above the typical night-time consumption of 11.25KWh mentioned above and should therefore be sufficient. In terms of costs, this is the largest single item at €2.048, more expensive than the 10 solar panels. The source of supply was again ALIBABA.
  
-{{ :tech:solarbatt.jpeg?nolink&400 |Ready LiFePO4> battery block}}+{{ :media:tech:solarvilla:solarbatt.jpeg?nolink&400 |Ready LiFePO4> battery block}}
  
  
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 <WRAP group> <WRAP group>
 <WRAP half column> <WRAP half column>
-{{ :de:tech:bms_1.png?nolink&307|}}+{{ :media:tech:solarvilla:bms_1.png?nolink&307|}}
 </WRAP> </WRAP>
 <WRAP half column> <WRAP half column>
-{{:de:tech:bms_2.png?nolink&300 |}}+{{:media:tech:solarvilla:bms_2.png?nolink&300 |}}
 </WRAP> </WRAP>
 </WRAP> </WRAP>
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 Our finished connection cabinet looks like this from the inside: Our finished connection cabinet looks like this from the inside:
  
-{{ :tech:solar_breaker_board.png?direct&300 |Solar breaker board}}+{{ :media:tech:solarvilla:solar_breaker_board.png?direct&300 |Solar breaker board}}
  
 It might seem overwhelming at first, but let's go through it in order: It might seem overwhelming at first, but let's go through it in order:
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 Here is the entire system overview with the associated cable thicknesses. The 2AWG battery cable and the 12AWG solar panel cable are flexible variants. Here is the entire system overview with the associated cable thicknesses. The 2AWG battery cable and the 12AWG solar panel cable are flexible variants.
  
-{{ :tech:solar_kabel.png?direct&400 |Solar system overview}}+{{ :media:tech:solarvilla:solar_kabel.png?direct&400 |Solar system overview}}
  
 :!: Should the inverter have a total failure, you would quickly be left in the dark. It is therefore very clever if you also install a transfer switch in the house supply, which switches the house completely back to the grid if necessary. :!: Should the inverter have a total failure, you would quickly be left in the dark. It is therefore very clever if you also install a transfer switch in the house supply, which switches the house completely back to the grid if necessary.
  
-{{ :tech:transfer_switch.png?direct&300 |Automatic transfer switch}}+{{ :media:tech:solarvilla:transfer_switch.png?direct&300 |Automatic transfer switch}}
  
  
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 Since we are dealing with considerable voltages and currents here, we have to take a closer look at the different types of connections. Let's start with the panels. The solar panels are fitted with MC4 plugs and sockets as standard. The mounted cables of the panels are so long that they can be connected directly to the neighboring module. We only have to lend a hand for the series connection at the end and the connection to the inverter. It is best to buy a set with MC4 plugs/sockets, crimping tool (2.5/4/6mm²) and MC4 keys for little money (12.00 €). Since we are dealing with considerable voltages and currents here, we have to take a closer look at the different types of connections. Let's start with the panels. The solar panels are fitted with MC4 plugs and sockets as standard. The mounted cables of the panels are so long that they can be connected directly to the neighboring module. We only have to lend a hand for the series connection at the end and the connection to the inverter. It is best to buy a set with MC4 plugs/sockets, crimping tool (2.5/4/6mm²) and MC4 keys for little money (12.00 €).
  
-{{ :tech:mc4_set.png?direct&300 |MC4 set}}+{{ :media:tech:solarvilla:mc4_set.png?direct&300 |MC4 set}}
  
 The assembly is described in detail on the Internet (e.g. [[https://www.renogy.com/template/files/Manuals/TOOL-MC4.pdf|here]] ) and is very easy. The assembly is described in detail on the Internet (e.g. [[https://www.renogy.com/template/files/Manuals/TOOL-MC4.pdf|here]] ) and is very easy.
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 The battery blocks are connected to each other with metal rails and nuts, which are included in the scope of delivery. The battery connection on my CATL LiFePo<sub>4</sub> has an M6 thread. To connect the 16 balancer cables of the BMS to each cell we need a cable lug 18AWG(1mm²) to M6. For the connection between the two battery rows, the BMS, the 100A fuse and the inverter it is a 2AWG(35mm²) on M6 and M8. The right crimping tool for the 18AWG cable is again inexpensive everywhere. For the 2AWG you need a hydraulically supported variant to apply the mandatory force: The battery blocks are connected to each other with metal rails and nuts, which are included in the scope of delivery. The battery connection on my CATL LiFePo<sub>4</sub> has an M6 thread. To connect the 16 balancer cables of the BMS to each cell we need a cable lug 18AWG(1mm²) to M6. For the connection between the two battery rows, the BMS, the 100A fuse and the inverter it is a 2AWG(35mm²) on M6 and M8. The right crimping tool for the 18AWG cable is again inexpensive everywhere. For the 2AWG you need a hydraulically supported variant to apply the mandatory force:
  
-{{ :tech:crimp_35mm.png?direct&200 |Crimp tool 4-70mm2}}+{{ :media:tech:solarvilla:crimp_35mm.png?direct&200 |Crimp tool 4-70mm2}}
  
 You could even get it here in Thailand in a well-stocked DIY store for around €40. You could even get it here in Thailand in a well-stocked DIY store for around €40.
Line 258: Line 258:
  
 ^ Image ^ Cable Diameter ^ Hole Diameter ^ ^ Image ^ Cable Diameter ^ Hole Diameter ^
-| {{ :tech:18awg_m6.png?direct&50 |}} | 18AWG(1mm²) | M6 | +| {{ :media:tech:solarvilla:18awg_m6.png?direct&50 |}} | 18AWG(1mm²) | M6 | 
-| {{ :tech:8awg_m6.png?direct&50 |}} | 8AWG(10mm²) | M6 | +| {{ :media:tech:solarvilla:8awg_m6.png?direct&50 |}} | 8AWG(10mm²) | M6 | 
-| {{ :tech:2awg_m6.png?direct&50 |}} | 2AWG(35mm²) | M6 | +| {{ :media:tech:solarvilla:2awg_m6.png?direct&50 |}} | 2AWG(35mm²) | M6 | 
-| {{ :tech:2awg_m8.png?direct&50 |}} | 2AWG(35mm²) | M8 |+| {{ :media:tech:solarvilla:2awg_m8.png?direct&50 |}} | 2AWG(35mm²) | M8 |
  
 +
 +===== Settings =====
 +
 +Before we can go into operation, we still have to setup the BMS and the inverter.
 +
 +=== JKBMS ===
 +
 +The basic setting can be easily made via the app and at first the battery type LiFePo<sub>4</sub> is selected. The other parameters should then be adjusted to the characteristics of the battery. For me, the most important parameters look like this:
 +
 +<code>
 +Balance starting voltage               3.00 V
 +Balance trigger voltage                0.01 V
 +Cell count                             16
 +Cell voltage overvoltage protection    3.60 V
 +Cell voltage overvoltage recovery      3.45 V
 +Cell voltage undervoltage protection   2.60 V
 +Cell voltage undervoltage recovery.    3.00 V
 +Max balance current                    2.00 A
 +Max charge current                     62.0 A
 +Max discharge current                  100 A
 +Power off voltage                      2.50 V
 +Total battery capacity                 310Ah
 +</code>
 +
 +=== GROWATT SPF5000ES ===
 +
 +The inverter can be set directly at the device via the control panel or via the Growatt server. I have listed the most important parameters below:
 +
 +<code>
 +Program Setting Option       Description
 +----------------------------------------------------------------------------------------------
 +1 SBU (SBU priority).   Output source priority: To configure load power source priority
 +2 62A               Maximum charging current: set total charging current for solar and utility chargers. 
 +3 APL (Appliance)       AC input voltage range
 +4 DIS (disabled)       Power saving mode enable/disable
 +5 US2 (user-defined 2)  Battery type
 +6 DIS (disabled)       Auto restart when overload occurs
 +7 DIS (disabled)       Auto restart when over temperature occurs
 +8 230V               Output voltage
 +9 50Hz               Output frequency
 +10 16               Number of series batteries connected
 +11 30A               Maximum utility charging current
 +12 48.0V (3.0V x 16).    Setting voltage point back to utility source when selecting “SBU priority” or “Solar first” in program 01
 +13 54.4V (3.4V x 16).    Setting voltage point back to battery mode when selecting “SBU priority” or “Solar first” in program 01
 +14 CSO (solar first).    Charger source priority: To configure charger source priority
 +15 ON               Alarm control
 +16 ON               Backlight control
 +17 ON               Beeps while primary source is interrupted
 +18 ENA (enabled)       Overload bypass
 +19 56.8V (3.55V x 16).   C.V. charging voltage.
 +20 54.0V (3.375V x 16)   Floating charging voltage. If self-defined is selected in program 5, this program can be set up
 +21 44.0V               Low DC cut-off voltage.
 +</code>
 +
 +
 +===== Integration in Home Assistant =====
 +
 +As mentioned above, there is a handy app for the BMS for live data and settings. It runs via Bluetooth on iOS and Android. But in order to access it via Home Assistant, we needed a Bluetooth gateway.
 +
 +:!: Warning: It must support Bluetooth 4.2 to be able to use frame lengths of more than 20 bytes. The 300 bytes of live data are sent in three notification frames.
 +
 +A simple solution can again be achieved with an ESP32 module and ESPHome. You can find the software description [[https://github.com/syssi/esphome-jk-bms|here]].
 +My setup can be found in the attachment for reference.
 +
 +++++ jk-bms-ble.yaml |
 +
 +<file yaml jk-bms-ble.yaml>
 +substitutions:
 +  name: jk-bms
 +  device_description: "Monitor and control a JK-BMS via bluetooth"
 +  external_components_source: github://syssi/esphome-jk-bms@main
 +  mac_address: AA:BB:CC:DD:EE:FF
 +  # Defaults to "JK02". Please use "JK04" if you have some old JK-BMS version (f.e. JK-B2A16S hw 3.0, sw. 3.3.0)
 +  protocol_version: JK02
 +
 +esphome:
 +  name: ${name}
 +  comment: ${device_description}
 +  project:
 +    name: "syssi.esphome-jk-bms"
 +    version: 1.2.0
 +  platformio_options:
 +    build_flags: 
 +      - -DCONFIG_ARDUINO_LOOP_STACK_SIZE=32768
 +
 +esp32:
 +  board: nodemcu-32s
 +  framework:
 +#  The arduino platform crashs
 +#    type: arduino
 +#    version: latest
 +    type: esp-idf
 +    version: latest
 +
 +# Enable logging
 +logger:
 +
 +# Enable Home Assistant API
 +api:
 +  encryption:
 +    key: "-----key-----"
 +
 +ota:
 +  password: "-----password-----"
 +
 +wifi:
 +  ssid: !secret wifi_ssid
 +  password: !secret wifi_password
 +
 +  # Optional manual IP
 +  manual_ip:
 +    static_ip: 192.168.1.100
 +    gateway: 192.168.1.1
 +    subnet: 255.255.255.0
 +
 +  # Enable fallback hotspot (captive portal) in case wifi connection fails
 +  ap:
 +    ssid: "Jk-Bms-Ble Fallback Hotspot"
 +    password: "----password----"
 +
 +external_components:
 +  - source: ${external_components_source}
 +    refresh: 0s
 +
 +esp32_ble_tracker:
 +
 +ble_client:
 +  - mac_address: ${mac_address}
 +    id: client0
 +
 +jk_bms_ble:
 +  - ble_client_id: client0
 +    protocol_version: ${protocol_version}
 +    throttle: 5s
 +    id: bms0
 +
 +binary_sensor:
 +  - platform: jk_bms_ble
 +    balancing:
 +      name: "${name} balancing"
 +    charging:
 +      name: "${name} charging"
 +    discharging:
 +      name: "${name} discharging"
 +
 +button:
 +  - platform: jk_bms_ble
 +    retrieve_settings:
 +      name: "${name} retrieve settings"
 +    retrieve_device_info:
 +      name: "${name} retrieve device info"
 +
 +number:
 +  - platform: jk_bms_ble
 +    jk_bms_ble_id: bms0
 +    balance_trigger_voltage:
 +      name: "${name} balance trigger voltage"
 +    cell_count:
 +       name: "${name} cell count"
 +    total_battery_capacity:
 +      name: "${name} total battery capacity"
 +    cell_voltage_overvoltage_protection:
 +      name: "${name} cell voltage overvoltage protection"
 +    cell_voltage_overvoltage_recovery:
 +      name: "${name} cell voltage overvoltage recovery"
 +    cell_voltage_undervoltage_protection:
 +      name: "${name} cell voltage undervoltage protection"
 +    cell_voltage_undervoltage_recovery:
 +      name: "${name} cell voltage undervoltage recovery"
 +    balance_starting_voltage:
 +      name: "${name} balance starting voltage"
 +    voltage_calibration:
 +      name: "${name} voltage calibration"
 +    current_calibration:
 +      name: "${name} current calibration"
 +    power_off_voltage:
 +      name: "${name} power off voltage"
 +    max_balance_current:
 +      name: "${name} max balance current"
 +    max_charge_current:
 +      name: "${name} max charge current"
 +    max_discharge_current:
 +      name: "${name} max discharge current"
 +
 +sensor:
 +  - platform: jk_bms_ble
 +    jk_bms_ble_id: bms0
 +    min_cell_voltage:
 +      name: "${name} min cell voltage"
 +    max_cell_voltage:
 +      name: "${name} max cell voltage"
 +    min_voltage_cell:
 +      name: "${name} min voltage cell"
 +    max_voltage_cell:
 +      name: "${name} max voltage cell"
 +    delta_cell_voltage:
 +      name: "${name} delta cell voltage"
 +    average_cell_voltage:
 +      name: "${name} average cell voltage"
 +    cell_voltage_1:
 +      name: "${name} cell voltage 1"
 +    cell_voltage_2:
 +      name: "${name} cell voltage 2"
 +    cell_voltage_3:
 +      name: "${name} cell voltage 3"
 +    cell_voltage_4:
 +      name: "${name} cell voltage 4"
 +    cell_voltage_5:
 +      name: "${name} cell voltage 5"
 +    cell_voltage_6:
 +      name: "${name} cell voltage 6"
 +    cell_voltage_7:
 +      name: "${name} cell voltage 7"
 +    cell_voltage_8:
 +      name: "${name} cell voltage 8"
 +    cell_voltage_9:
 +      name: "${name} cell voltage 9"
 +    cell_voltage_10:
 +      name: "${name} cell voltage 10"
 +    cell_voltage_11:
 +      name: "${name} cell voltage 11"
 +    cell_voltage_12:
 +      name: "${name} cell voltage 12"
 +    cell_voltage_13:
 +      name: "${name} cell voltage 13"
 +    cell_voltage_14:
 +      name: "${name} cell voltage 14"
 +    cell_voltage_15:
 +      name: "${name} cell voltage 15"
 +    cell_voltage_16:
 +      name: "${name} cell voltage 16"
 +    cell_voltage_17:
 +      name: "${name} cell voltage 17"
 +    cell_voltage_18:
 +      name: "${name} cell voltage 18"
 +    cell_voltage_19:
 +      name: "${name} cell voltage 19"
 +    cell_voltage_20:
 +      name: "${name} cell voltage 20"
 +    cell_voltage_21:
 +      name: "${name} cell voltage 21"
 +    cell_voltage_22:
 +      name: "${name} cell voltage 22"
 +    cell_voltage_23:
 +      name: "${name} cell voltage 23"
 +    cell_voltage_24:
 +      name: "${name} cell voltage 24"
 +    cell_resistance_1:
 +      name: "${name} cell resistance 1"
 +    cell_resistance_2:
 +      name: "${name} cell resistance 2"
 +    cell_resistance_3:
 +      name: "${name} cell resistance 3"
 +    cell_resistance_4:
 +      name: "${name} cell resistance 4"
 +    cell_resistance_5:
 +      name: "${name} cell resistance 5"
 +    cell_resistance_6:
 +      name: "${name} cell resistance 6"
 +    cell_resistance_7:
 +      name: "${name} cell resistance 7"
 +    cell_resistance_8:
 +      name: "${name} cell resistance 8"
 +    cell_resistance_9:
 +      name: "${name} cell resistance 9"
 +    cell_resistance_10:
 +      name: "${name} cell resistance 10"
 +    cell_resistance_11:
 +      name: "${name} cell resistance 11"
 +    cell_resistance_12:
 +      name: "${name} cell resistance 12"
 +    cell_resistance_13:
 +      name: "${name} cell resistance 13"
 +    cell_resistance_14:
 +      name: "${name} cell resistance 14"
 +    cell_resistance_15:
 +      name: "${name} cell resistance 15"
 +    cell_resistance_16:
 +      name: "${name} cell resistance 16"
 +    cell_resistance_17:
 +      name: "${name} cell resistance 17"
 +    cell_resistance_18:
 +      name: "${name} cell resistance 18"
 +    cell_resistance_19:
 +      name: "${name} cell resistance 19"
 +    cell_resistance_20:
 +      name: "${name} cell resistance 20"
 +    cell_resistance_21:
 +      name: "${name} cell resistance 21"
 +    cell_resistance_22:
 +      name: "${name} cell resistance 22"
 +    cell_resistance_23:
 +      name: "${name} cell resistance 23"
 +    cell_resistance_24:
 +      name: "${name} cell resistance 24"
 +    total_voltage:
 +      name: "${name} total voltage"
 +    current:
 +      name: "${name} current"
 +    power:
 +      name: "${name} power"
 +    charging_power:
 +      name: "${name} charging power"
 +    discharging_power:
 +      name: "${name} discharging power"
 +    temperature_sensor_1:
 +      name: "${name} temperature sensor 1"
 +    temperature_sensor_2:
 +      name: "${name} temperature sensor 2"
 +    power_tube_temperature:
 +      name: "${name} power tube temperature"
 +    state_of_charge:
 +      name: "${name} state of charge"
 +    capacity_remaining:
 +      name: "${name} capacity remaining"
 +    total_battery_capacity_setting:
 +      name: "${name} total battery capacity setting"
 +    charging_cycles:
 +      name: "${name} charging cycles"
 +    total_charging_cycle_capacity:
 +      name: "${name} total charging cycle capacity"
 +    total_runtime:
 +      name: "${name} total runtime"
 +    balancing_current:
 +      name: "${name} balancing current"
 +    errors_bitmask:
 +      name: "${name} errors bitmask"
 +
 +switch:
 +  - platform: jk_bms_ble
 +    charging:
 +      name: "${name} charging"
 +    discharging:
 +      name: "${name} discharging"
 +    balancer:
 +      name: "${name} balancer"
 +
 +  - platform: ble_client
 +    ble_client_id: client0
 +    name: "${name} enable bluetooth connection"
 +
 +text_sensor:
 +  - platform: jk_bms_ble
 +    errors:
 +      name: "${name} errors"
 +    total_runtime_formatted:
 +      name: "${name} total runtime formatted"
 +</file>
 +
 +++++
 +
 +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]]).
 +
 +{{ :media:tech:solarvilla: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.
 +
 +{{ :media:tech:solarvilla: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>
en/tech/solarvilla.1681632905.txt.gz · Last modified: by bullar

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