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Hybrid inverters with DC>AC power can result in unwanted grid supply #2734

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ttjaden opened this issue Feb 28, 2022 · 4 comments · Fixed by #2735
Closed

Hybrid inverters with DC>AC power can result in unwanted grid supply #2734

ttjaden opened this issue Feb 28, 2022 · 4 comments · Fixed by #2735
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bug Something isn't working

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@ttjaden
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ttjaden commented Feb 28, 2022 •
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Describe the bug
With hybrid inverters (kostal plenticore, fronius gen24, etc.) and pv generators > nominal ac power of the inverter, evcc assumes more pv generation than possible. Therefore, energy is drawn from the grid.

To Reproduce
Steps to reproduce the behavior:

  1. evcc v0.82
  2. installed DC PV generator power must be bigger than rated AC inverter power.
  3. wait for a sunny day :-)
  4. see the next pictures

15 kWp on a Fronius Symo Gen24 with 10 kVA rated power

Production
grafik

Usage:
grafik

Expected behavior

  • From 10:00 to 12:00 EVCC should control the evcc load to a total load of 9.5 kW
  • Instead it controls the load to 11.5 kW, which is MPPT1+2
  • But: MPPT1+2 can be greater than AC output power of the inverter, which is limited to 10 kVA, which means roughly 9.5 kW with an cosphi of 0.9

Solution:

  • Quick&Dirty: EVCC should calculate (MPPT1+2 minus battery charging power) as the available pvpower on the AC side.
  • or there has to be a kind of max() function be enabled with the pvpower_max_ac from the evcc.yaml
@andig andig added the question Rather clarification than issue label Feb 28, 2022
@ttjaden
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ttjaden commented Feb 28, 2022

This is the part from the config

# meter definitions
# name can be freely chosen and is used as reference when assigning meters to site and loadpoints
# for examples see https://github.com/evcc-io/config#meters
meters:
- name: pv
  type: custom
  power:
    source: calc
    add:
    - source: modbus
      model: sunspec
      uri: 192.168.178.74:502
      id: 1
      value: 160:1:DCW # mpp 1 pv
    - source: modbus
      model: sunspec
      uri: 192.168.178.74:502
      id: 1
      value: 160:2:DCW # mpp 2 pv

- name: battery
  type: custom
  power:
    source: calc
    add:
    - source: modbus
      model: sunspec
      uri: 192.168.178.74:502
      id: 1
      value: 160:3:DCW # mppt 3 charge
      scale: -1
    - source: modbus
      model: sunspec
      uri: 192.168.178.74:502
      id: 1
      value: 160:4:DCW # mppt 4 discharge
  soc:
    source: modbus
    model: sunspec
    uri: 192.168.178.74:502
    id: 1
    value: ChargeState

- name: grid
  type: modbus
  model: sunspec
  uri: 192.168.178.74:502
  id: 200
  power: 213:W # sunspec meter

@ttjaden
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ttjaden commented Feb 28, 2022

This is the debug log
`

evcc

date stream content
2022-02-28 11:32:05 stdout [site  ] DEBUG 2022/02/28 12:32:05 grid power: 962W
2022-02-28 11:32:05 stdout [site  ] DEBUG 2022/02/28 12:32:05 ----
2022-02-28 11:31:50 stdout [lp-2  ] DEBUG 2022/02/28 12:31:50 charge currents: [0 0 0]A
2022-02-28 11:31:50 stdout [lp-2  ] DEBUG 2022/02/28 12:31:50 charge power: 0W
2022-02-28 11:31:50 stdout [lp-2  ] DEBUG 2022/02/28 12:31:50 charger status: A
2022-02-28 11:31:50 stdout [lp-2  ] DEBUG 2022/02/28 12:31:50 charge currents: [0 0 0]A
2022-02-28 11:31:50 stdout [lp-2  ] DEBUG 2022/02/28 12:31:50 charge power: 0W
2022-02-28 11:31:50 stdout [site  ] DEBUG 2022/02/28 12:31:50 site power: -419W
2022-02-28 11:31:50 stdout [site  ] DEBUG 2022/02/28 12:31:50 battery soc 0: 98%
2022-02-28 11:31:50 stdout [site  ] DEBUG 2022/02/28 12:31:50 battery power: -1542W
2022-02-28 11:31:50 stdout [site  ] DEBUG 2022/02/28 12:31:50 pv power: 11070W
2022-02-28 11:31:50 stdout [site  ] DEBUG 2022/02/28 12:31:50 grid power: 1123W
2022-02-28 11:31:50 stdout [site  ] DEBUG 2022/02/28 12:31:50 ----
2022-02-28 11:31:36 stdout [lp-1  ] DEBUG 2022/02/28 12:31:36 detected phases: 3p [13.6 13.5 13.6]A
2022-02-28 11:31:36 stdout [lp-1  ] DEBUG 2022/02/28 12:31:36 charge currents: [13.6 13.5 13.6]A
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 charge power: 9220W
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 max charge current: 14A
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 max charge current: 14.4A = 14A + 0.401A (-277W @ 3p)
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 vehicle odometer: 32708km
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 vehicle range: 54km
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 vehicle soc: 21%
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 soc estimated: 21.53% (vehicle: 21.00%)
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 next soc poll remaining time: 14m30s
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 charger status: C
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 detected phases: 3p [13.6 13.5 13.6]A
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 charge currents: [13.6 13.5 13.6]A
2022-02-28 11:31:35 stdout [lp-1  ] DEBUG 2022/02/28 12:31:35 charge power: 9220W
2022-02-28 11:31:35 stdout [site  ] DEBUG 2022/02/28 12:31:35 site power: -277W
2022-02-28 11:31:35 stdout [site  ] DEBUG 2022/02/28 12:31:35 battery soc 0: 98%
2022-02-28 11:31:35 stdout [site  ] DEBUG 2022/02/28 12:31:35 battery power: -1528W
2022-02-28 11:31:35 stdout [site  ] DEBUG 2022/02/28 12:31:35 pv power: 11074W
2022-02-28 11:31:35 stdout [site  ] DEBUG 2022/02/28 12:31:35 grid power: 1251W
2022-02-28 11:31:35 stdout [site  ] DEBUG 2022/02/28 12:31:35 ----
2022-02-28 11:31:20 stdout [lp-2  ] DEBUG 2022/02/28 12:31:20 charge currents: [0 0 0]A
2022-02-28 11:31:20 stdout [lp-2  ] DEBUG 2022/02/28 12:31:20 charge power: 0W
2022-02-28 11:31:20 stdout [lp-2  ] DEBUG 2022/02/28 12:31:20 charger status: A
2022-02-28 11:31:20 stdout [lp-2  ] DEBUG 2022/02/28 12:31:20 charge currents: [0 0 0]A
2022-02-28 11:31:20 stdout [lp-2  ] DEBUG 2022/02/28 12:31:20 charge power: 0W
2022-02-28 11:31:20 stdout [site  ] DEBUG 2022/02/28 12:31:20 site power: -372W
2022-02-28 11:31:20 stdout [site  ] DEBUG 2022/02/28 12:31:20 battery soc 0: 98%
2022-02-28 11:31:20 stdout [site  ] DEBUG 2022/02/28 12:31:20 battery power: -1487W
2022-02-28 11:31:20 stdout [site  ] DEBUG 2022/02/28 12:31:20 pv power: 11087W
2022-02-28 11:31:20 stdout [site  ] DEBUG 2022/02/28 12:31:20 grid power: 1115W
2022-02-28 11:31:20 stdout [site  ] DEBUG 2022/02/28 12:31:20 ----
2022-02-28 11:31:06 stdout [lp-1  ] DEBUG 2022/02/28 12:31:06 detected phases: 3p [10.2 10.2 10.2]A
2022-02-28 11:31:06 stdout [lp-1  ] DEBUG 2022/02/28 12:31:06 charge currents: [10.2 10.2 10.2]A
2022-02-28 11:31:06 stdout [lp-1  ] DEBUG 2022/02/28 12:31:06 charge power: 6950W
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 max charge current: 14A
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 max charge current: 14.7A = 11A + 3.7A (-2551W @ 3p)
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 vehicle odometer: 32708km
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 vehicle range: 54km
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 vehicle soc: 21%
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 soc estimated: 21.40% (vehicle: 21.00%)
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 next soc poll remaining time: 14m29s
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 charger status: C
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 detected phases: 3p [10.2 10.2 10.2]A
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 charge currents: [10.2 10.2 10.2]A
2022-02-28 11:31:05 stdout [lp-1  ] DEBUG 2022/02/28 12:31:05 charge power: 6950W
2022-02-28 11:31:05 stdout [site  ] DEBUG 2022/02/28 12:31:05 site power: -2551W
2022-02-28 11:31:05 stdout [site  ] DEBUG 2022/02/28 12:31:05 battery soc 0: 98%
2022-02-28 11:31:05 stdout [site  ] DEBUG 2022/02/28 12:31:05 battery power: -2460W
2022-02-28 11:31:05 stdout [site  ] DEBUG 2022/02/28 12:31:05 pv power: 11065W
2022-02-28 11:31:05 stdout [site  ] DEBUG 2022/02/28 12:31:05 grid power: -91W
2022-02-28 11:31:05 stdout [site  ] DEBUG 2022/02/28 12:31:05 ----
2022-02-28 11:30:50 stdout [lp-2  ] DEBUG 2022/02/28 12:30:50 charge currents: [0 0 0]A
2022-02-28 11:30:50 stdout [lp-2  ] DEBUG 2022/02/28 12:30:50 charge power: 0W
2022-02-28 11:30:50 stdout [lp-2  ] DEBUG 2022/02/28 12:30:50 charger status: A
2022-02-28 11:30:50 stdout [lp-2  ] DEBUG 2022/02/28 12:30:50 charge currents: [0 0 0]A
2022-02-28 11:30:50 stdout [lp-2  ] DEBUG 2022/02/28 12:30:50 charge power: 0W
2022-02-28 11:30:50 stdout [site  ] DEBUG 2022/02/28 12:30:50 site power: -2760W
2022-02-28 11:30:50 stdout [site  ] DEBUG 2022/02/28 12:30:50 battery soc 0: 98%
2022-02-28 11:30:50 stdout [site  ] DEBUG 2022/02/28 12:30:50 battery power: -2167W
2022-02-28 11:30:50 stdout [site  ] DEBUG 2022/02/28 12:30:50 pv power: 11088W
2022-02-28 11:30:50 stdout [site  ] DEBUG 2022/02/28 12:30:50 grid power: -593W
2022-02-28 11:30:50 stdout [site  ] DEBUG 2022/02/28 12:30:50 ----
2022-02-28 11:30:36 stdout [lp-1  ] DEBUG 2022/02/28 12:30:36 detected phases: 3p [10.3 10.1 10.3]A
2022-02-28 11:30:36 stdout [lp-1  ] DEBUG 2022/02/28 12:30:36 charge currents: [10.3 10.1 10.3]A
2022-02-28 11:30:36 stdout [lp-1  ] DEBUG 2022/02/28 12:30:36 charge power: 6980W
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 max charge current: 11A
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 max charge current: 11.5A = 11A + 0.518A (-358W @ 3p)
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 vehicle odometer: 32708km
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 vehicle range: 54km
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 vehicle soc: 21%
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 soc estimated: 21.30% (vehicle: 21.00%)
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 next soc poll remaining time: 14m29s
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 charger status: C
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 detected phases: 3p [10.3 10.1 10.3]A
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 charge currents: [10.3 10.1 10.3]A
2022-02-28 11:30:35 stdout [lp-1  ] DEBUG 2022/02/28 12:30:35 charge power: 6980W
2022-02-28 11:30:35 stdout [site  ] DEBUG 2022/02/28 12:30:35 site power: -358W
2022-02-28 11:30:35 stdout [site  ] DEBUG 2022/02/28 12:30:35 battery soc 0: 98%
2022-02-28 11:30:35 stdout [site  ] DEBUG 2022/02/28 12:30:35 battery power: -1552W
2022-02-28 11:30:35 stdout [site  ] DEBUG 2022/02/28 12:30:35 pv power: 11101W
2022-02-28 11:30:35 stdout [site  ] DEBUG 2022/02/28 12:30:35 grid power: 1194W
2022-02-28 11:30:35 stdout [site  ] DEBUG 2022/02/28 12:30:35 ----
2022-02-28 11:30:20 stdout [lp-2  ] DEBUG 2022/02/28 12:30:20 charge currents: [0 0 0]A
2022-02-28 11:30:20 stdout [lp-2  ] DEBUG 2022/02/28 12:30:20 charge power: 0W
2022-02-28 11:30:20 stdout [lp-2  ] DEBUG 2022/02/28 12:30:20 charger status: A
2022-02-28 11:30:20 stdout [lp-2  ] DEBUG 2022/02/28 12:30:20 charge currents: [0 0 0]A
2022-02-28 11:30:20 stdout [lp-2  ] DEBUG 2022/02/28 12:30:20 charge power: 0W
2022-02-28 11:30:20 stdout [site  ] DEBUG 2022/02/28 12:30:20 site power: -520W
2022-02-28 11:30:20 stdout [site  ] DEBUG 2022/02/28 12:30:20 battery soc 0: 98%
2022-02-28 11:30:20 stdout [site  ] DEBUG 2022/02/28 12:30:20 battery power: -1564W
2022-02-28 11:30:20 stdout [site  ] DEBUG 2022/02/28 12:30:20 pv power: 11103W
2022-02-28 11:30:20 stdout [site  ] DEBUG 2022/02/28 12:30:20 grid power: 1044W
2022-02-28 11:30:20 stdout [site  ] DEBUG 2022/02/28 12:30:20 ----
2022-02-28 11:30:06 stdout [lp-1  ] DEBUG 2022/02/28 12:30:06 detected phases: 3p [10.2 10.3 10.2]A
2022-02-28 11:30:06 stdout [lp-1  ] DEBUG 2022/02/28 12:30:06 charge currents: [10.2 10.3 10.2]A
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 charge power: 6990W
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 max charge current: 11A
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 max charge current: 11.5A = 11A + 0.487A (-336W @ 3p)
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 vehicle odometer: 32708km
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 vehicle range: 54km
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 vehicle soc: 21%
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 soc estimated: 21.20% (vehicle: 21.00%)
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 next soc poll remaining time: 14m29s
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 charger status: C
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 detected phases: 3p [10.2 10.3 10.2]A
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 charge currents: [10.2 10.3 10.2]A
2022-02-28 11:30:05 stdout [lp-1  ] DEBUG 2022/02/28 12:30:05 charge power: 6990W
2022-02-28 11:30:05 stdout [site  ] DEBUG 2022/02/28 12:30:05 site power: -336W
2022-02-28 11:30:05 stdout [site  ] DEBUG 2022/02/28 12:30:05 battery soc 0: 98%
2022-02-28 11:30:05 stdout [site  ] DEBUG 2022/02/28 12:30:05 battery power: -1551W
`

@ttjaden
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ttjaden commented Feb 28, 2022

evcc.zip

@andig andig mentioned this issue Feb 28, 2022
Merged
@andig andig added bug Something isn't working and removed question Rather clarification than issue labels Feb 28, 2022
@andig andig changed the title With hybrid inverters the control of EVCC can result in unwanted grid supply Hybrid inverters with DC>AC power can result in unwanted grid supply Feb 28, 2022
@ttjaden
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ttjaden commented Mar 9, 2022

I guess this logging graph explains the problem

grafik

Somehow EVCC has to reflect that pvpower can be limited on the AC side by the rated AC power of the inverter.

@andig andig mentioned this issue Jun 4, 2022
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Offset available power by dc-generated battery charge evcc-io/evcc
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@andig @ttjaden