Skip to content

pv.md

Latest commit

 

History

History
123 lines (92 loc) · 4.65 KB

pv.md

File metadata and controls

123 lines (92 loc) · 4.65 KB
Raw

Photo Voltaic System

Electrical Diagram

  • The home is connected to the inverter's backup output. In case of inverter failure, the home can be powered directly from the grid by switching the "Photovoltaic - Grid selector".
  • The heat pump is powered directly from the grid. The heat accumulated by the house is sufficient to survive day-length power outages.
      Main switch                        Photovoltaic - Grid selector
GRID o----/  ----+-----------------------------------o
                 |                                     
                 | Inverter switch    +----------+      o------o HOME 
                 +-------/  ----------| Inverter |---o /
                 |                    +----------+ 
                 |
                 | Heatpump switch    +----------+
                 +-------/  ----------| Heatpump |
                                      +----------+

Turn off

  1. Inverter on/off
  2. AC Circuit Breaker
  3. Battery Storage
  4. DC Isolator

Turn on

  1. AC Circuit Breaker
  2. Battery Storage
  3. DC Isolator
  4. Inverter on/off

Inverter

  • Model: Solis S6-EH3P12K02-NV-YD-L
  • Version: 060008-080005 (14.08.2025)

Battery related configuration

  • Force Charge 5% – Regardless of everything else, once the battery reaches this level, it will be charged from the grid up to the level specified by Recovery 25%.
  • Over Discharge 10% – At this level, the inverter stops drawing energy from the battery and also cuts off the backup output in the event of a grid failure.
  • Batt Reserve 20-100% – At this level, the inverter stops drawing energy from the battery, unless there is a grid failure, in which case it will supply the backup output until Over Discharge is reached.
  • Max Charge SOC 100% – I allow the battery to be charged to full capacity.
  • Allow Grid Charge ON – The battery can be charged from the grid if needed. the inverter will still charge it from the grid.
  • Battery Saving ON – When the SOC is below Batt Reserve, the inverter draws energy from the grid for its own needs, without using up my reserve.

Storage modes

  • BIT00 - Self-Use mode switch - Storage Mode "Self use"
  • BIT01 - Time of Use switch - TODO
  • BIT02 - Off-Grid mode switch - Storage Mode "Off-Grid"
  • BIT03 - Battery wake-up switch - TODO
  • BIT04 - Back-up mode switch - Battery Reserve Switch "ON/OFF"
  • BIT05 - Allow charging from the grid - Allow Grid Charge "ON/OFF"
  • BIT06 - Feed-In priority mode switch - Storage Mode "Selling first"
  • BIT07 - Night battery over-discharge hold - TODO
  • BIT08 - Dynamic regulation enable when force-charging - TODO
  • BIT09 - Battery current correction enable - TODO
  • BIT10 - Battery treatment mode - TODO
  • BIT11 - Peak-shaving mode switch - Grid Peak Shaving "ON/OFF"
  • BIT12 - Reserve
  • BIT13 - Reserve
  • BIT14 - Reserve
  • BIT15 - Reserve

Either Self Use or Feed In Priority mode must be turned ON, turning one on will automatically turn the other off. Backup mode can be turned on independently of Self Use and Feed In Priority as this mode determines how the system will behave when the grid goes down. Off Grid mode should only be turned on if the system is installed with no grid connection at all.

Examples for "Self-Use" mode:

  • 1 (decimal), 0000 0000 0000 001 (binary) - grid charge OFF
  • 17 (decimal), 0000 0000 0001 0001 (binary) - grid charge OFF, back-up mode ON
  • 49 (decimal), 0000 0000 0011 0001 (binary) - grid charge ON, back-up mode ON,

Examples for "Feed-In" mode:

  • 64 (decimal), 0000 0000 0100 0000 (binary) - grid-charge OFF
  • 80 (decimal), 0000 0000 0101 0000 (binary) - grid-charge OFF, back-up mode ON
  • 112 (decimal), 0000 0000 0111 0000 (binary) - grid-charge ON, back-up mode ON

Documentation:

Time of Use

Self-Use Mode:

  • "discharge slot" - battery -> grid
  • "charge slot" - doesn't matter if charging from grid isn't allowed
  • "out of defined slots" - solar -> load -> battery

Feed-In Priority Mode:

  • "discharge slot" - battery -> grid
  • "charge slot" - solar -> battery (but load from grid only)
  • "out of defined slots" - solar -> load -> grid

Data logger

  • Model: S2-WL-ST
  • Version: 100121d0

Battery

  • Sunwooda Atrix LV, 20kWh

Solar Panels

  • AIKO-A450-MAH54DW, 6.3kWp