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Solarna SystemsEngineering & digital systems

Solarna Systems / interactive engineering

Solar operations HMI

Follow the energy. Understand the state.

A working simulation of generation, conversion and consumption. Adjust the conditions and see the whole system respond.

Solarna / energy lab

74.8 kWp DC 2 × 30 kW AC
SimulationInitialisingSim +00:00:00
Explore a scenario
Simulation initialisingLocal illustration. No equipment connection or plant commands.

Preparing the local simulation. Values are unavailable until initialisation completes.

Power flow overview

From sunlight to site.

State unknown
Solar generation, site consumption and grid exchange Two independent 37.4 kWp arrays feed two 30 kW inverters. Their AC output joins the site bus, building load and utility grid. An optional AC-coupled battery model can join the bus. Arrows indicate power direction, not electron movement. SOLAR IRRADIANCEN/A W/m²Modelled cell temperature ARRAY 01 · 37.4 kWpARRAY 02 · 37.4 kWp DCDC INV-01N/A kWUnknown INV-02N/A kWUnknown Two independent DC → AC pathsAC BUS SITE LOADN/A kW served UTILITY GRIDN/A kW BATTERY + CONVERTERNot fittedOptional AC-coupled battery POWER DIRECTIONAC / DC energy flowGRID-FOLLOWINGGrid loss → output offPV and optional battery Solar power flow, stacked mobile view Two separate arrays and inverters join the site AC bus. Site load, grid and optional AC-coupled battery connect as separate branches. Arrows show power direction. SOLAR IRRADIANCEN/A W/m² 01 · 37.4 kWp02 · 37.4 kWp DCDC INV-01N/A kWUnknown INV-02N/A kWUnknown AC BUS SITE SERVEDN/A kW GRIDN/A kW BATTERY + PCSNot fittedOptional extension Grid-following sources · no backup mode
Arrows show power direction, not electron movement.Animation follows active flows.
PV output ACN/A kWUp to 60 kW ACUnknown
Site servedN/A kWDemand unknownUnknown
Grid exchangeN/A kWDirection unknownUnknown
Battery optionalNot fittedBattery option · offUnknown
Interactive simulation · no plant connection. The optional battery is not part of the PV drawing.

Generation & conversion

Two independent PV paths

Each 37.4 kWp array feeds its own 30 kW inverter.

Available DC, delivered DC and AC power, in kilowatts, per inverter
SourceAvailable
DC kW		Delivered
DC kW		Output
AC kW
INV-01UnknownN/AN/AN/A
INV-02UnknownN/AN/AN/A
PV available DC
N/A kW
PV delivered DC
N/A kW
Unused available DC
N/A kW
Active inverter capacity
N/A kW

Clipping and unavailable inverters reduce delivered power; available sunlight is shown separately.

Unknown

Power & stored energy

Every kilowatt accounted for

PV + battery discharge + grid import = served load + battery charge + grid export.

Balance unknownN/A
Unserved demand
N/A kW
Battery bus power + discharge / − charge
Not fitted
Battery SOC / stored energy
Not fitted
PV AC energy since restart
N/A kWh
Battery charge / discharge AC energy since restart
N/A / N/A kWh
Unserved energy since restart
N/A kWh

Model charge and discharge efficiency: 95% each. Reserve: 20%. Upper charge limit: 95%. Readings are rounded; balance uses full precision.

Unknown

Recent samples

The response over time

1 sample
PV ACRequested demand
Recent simulated PV power and requested demandSamples begin when the simulation starts. No pre-generated history.120600kW
Sim +00:00:00Now

Collecting samples. Only elapsed simulated time is recorded.

Unknown

Operator awareness

Alarms & events

0 active
  • No active alarms.

Acknowledgement records awareness. It does not clear an active fault.

Latest events simulated elapsed time

    Source identity & quality

    A complete total needs every source

    Local model SS-CPV-OPS-001 · no accepted sample.

    INV-01 / array 01
    UNAVAILABLE
    INV-02 / array 02
    UNAVAILABLE
    Complete PV AC total
    UNAVAILABLE
    Site demand / grid exchange
    UNAVAILABLE
    Optional battery / converter
    UNAVAILABLE · not fitted

    GOODAccepted simulation inputs.

    STALELast valid sample held.

    BADValidation failed; current value unknown.

    UNAVAILABLENo accepted sample or source absent.

    Equipment states are simulated, not field-proven. Breaker commands, feedback and isolation are not modeled. Zero displayed or animated power does not prove de-energisation. A known inverter fault may have a GOOD zero-power sample; missing data is never substituted with zero.

    Read the model, not just the numbers

    Clear assumptions. Clear boundaries.

    PV basis

    74.8 kWp, two distinct paths

    Two 37.4 kWp arrays and two 30 kW grid-tied inverters. LONGi LR5-72HPH-550M Pmax coefficient: −0.340%/°C at 25 °C STC (LONGi20211101V14). The model assumes 25 °C ambient, 45 °C nominal operating cell temperature, a 0.98 DC factor and 97% inverter efficiency.

    Grid & storage

    No simulated island operation

    PV and optional battery are grid-following. Grid loss stops both outputs and leaves demand unserved. The battery model absorbs surplus PV or offsets a shortfall within its power and SOC limits. It is absent from the current PV drawing.

    Data quality

    A stale value stays visibly stale

    Communications loss freezes the last valid readings and simulation clock, marks the state unknown and stops flow animation. Recovery retains existing equipment faults. All inputs and calculations stay in your browser.

    Engineering demonstration only. This process view is not a construction drawing, plant control interface or safety certification.

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