Optimize your electric energy

Version v172b 2026-03-15 21:00. For all remarks, found errors, questions, ... please send feedback via button below.

SIMULATION TYPE

Residential Non-residential AgriPV Plugin Custom Choose the type of simulation. This controls default tariffs, technical parameters, and profile defaults. You can still override any parameter below.

KWH CONSUMPTION/INJECTION PROFILE

Upload or change profile to be used

Optional: upload your own quarter-hour CSV: By using this upload function, you acknowledge and agree that your kWh-data (excluding your EAN number or other personal information) will be stored and made publicly accessible on this website. The function supports CSV files downloaded from MyFluvius containing 15-minute interval data for a minimum period of one year. The information of the latest available year will be used.
For most residential or non-residential users with a 230/400V connection, there will only be one file with withdrawal and injection data combined.
For users with a separate file, make sure the data range is exactly the same.

Upload type:

No file selected Works for residential customers (file starting with 'Verbruikshistoriek_*') and for non-residential customers with AMR meter if withdrawal and injection are present in one file.
CSV files need to contain 15-minute data with at least one full year available. Hourly, daily or monthly files are not supported and will be rejected.

Remember the given profilenumber after upload, and use this number in combination with profileset = other for future simulations. The EAN-number is not saved for privacy reasons.

Alternative: use one of the 2400 available Fluvius profiles. If a file was uploaded: use Profileset 'other':

If no file was uploaded, one of the Fluvius profiles, representing an 'average' residential user, is used as default. You can change the selected profile here.
If you want to use a profile that was already uploaded by a user, select 'other' as profileset and select the profilenumber in the dropdownlist.

Profileset: Push the button above for more info on the different Fluvius profiles.

Profilenumber: For profileset 'other', the profilenumber corresponds to the upload date+time. For AgriPV use the shown profilenumber, or upload your own data.

Only if you want to use a different yearly kWh consumption (pro rata with the consumption pattern of the selected profile):

Yearly kWh consumption to use (in kwh): If '0' is entered the program will use the yearconsumption of the 'default' profile.
If you fill in Yearly kwh consumption, the daily consumption profile of farming company is still used, but the yearly kwh consumption is changed pro rata.
If you want to use another profile and residential parameters, change this by clicking the item below.

Add extra kWh-load by weekday & time window (optional)

Define extra demand windows per weekday. End time is exclusive. Enter the total kWh for the time window; it will be evenly distributed over the quarters within that window (00/15/30/45 only). Values are added to Demand before PV and flow through the PV/EMS/BESS pipeline.

SYSTEM AND FINANCIAL DATA

Electricity tariff type:

Fix electricity tariff
Dynamic electricity tariff

Choose between fixed prices (below) or dynamic Belpex-based prices using the conversion coefficients.

Dynamic tariff conversion (Belpex Day Ahead → energy price)

These coefficients control how the per-quarter Belpex values are mapped to energy cost calculation for dynamic tariffs (consumption & injection).

Typical forms: Demand = (A x Belpex) + B, Injection = (C x Belpex) − D. This website uses €/kWh, adapt your figures accordingly if needed (some energy providers use €/MWh or €c/kWh).

Demand = × Belpex +

Injection = × Belpex −

Energy price (excl. VAT) – €/kwh Price energy component excl VAT (€/kwh). Do NOT include costs for GSC, WKK, distribution, taxes. Go to VNR consumption prices (looking forward) for the most recent and historical prices.

Injection price (in €/kwh): Price energy component excl VAT (€/kwh) for injected energy. VNR injection prices (looking forward)

Size PV to be installed (in Wp): Entered size will be ignored if one of the optimization buttons is used.

Max Power of Inverter (kVA): Max kVA of the inverter. Above this point, the inverter starts clipping. This can have an important impact when installing high Wp in PV.

Size battery to be installed (in kWh): Entered size will be ignored if one of the optimization buttons is used. Attention: only impact of increase of self-consumption is taken into account. The possible positive results of steering on a dynamic tariff or imbalance market is not (yet) taken into account!

VAT (in %): 6% for residential customers, 21% for professional customers. ATTENTION: put VAT=0% if you can recuperate your VAT, because cashflow-difference is calculated after VAT.

Toegangsvermogen (kVA): Only relevant for non-residential and AgriPV connections (>400V). For residential it is ignored.

Upfront extra income(+) or cost(-) (€): Optional. For example 1 time upfront subsidy (+) or 1 time fee to pay (-)

Yearly extra income(+) or cost(-) (€): Optional. For example yearly subsidies (+) or yearly fee to pay (-)

SOLAR DATA

Latitude/Longitude :

Address (optional):

Configuration PV:

Single Orientation i Dual Orientation i

Azimuth of PV-panels (°): With 0° facing North, 90° facing East, 180 facing South and 270 facing West.
If 'Dual' is chosen in PV-configuration, half of the panels will have the opposite direction of the chosen Azimuth.

Tilt of PV-panels (°): Tilt is the same for all panels, although in 'Dual'-configuration they have opposite directions.

Simulate impact EMS (optional)

EMS: shift kwh to selfconsumption (in %): A user has after installing PV still grid consumption. In this parameter you can define which percentage of this consumption you want to 'steer' with an EMS to hours when there is free production capacity of the solar panels. Lowers consumption and increases injection.

EMS: reduction of average kw-peak (in %): (ATTENTION: only fiancial impact. Impact on kW-peak not shown in graphs!) An EMS help in reducing the monthly kw-peak, by stopping electric appliances or reducing their kw-consumption. Reduction = avg monthly kw-peak * defined percentage (after PV, EMS or Batt)

Only for AgriPV setup (optional)

AGRI PV - DATA

For detailed info and simulations of AgriPV: KU Leuven AgriVoltaics Simulation
Some of the input and results of those simulations can be reused on this website.

Input AgriPV Size and PV-data

Size of ha Agri PV to install (#): Size of the area where Agri PV should be installed. This is not only the area of the PV setup, but the full area of the crops.

kWp/ha (kWp): How many kWp/ha will be installed. This number can be found in the results from the simulation on the Agrivoiltaics KU Levuen website.

Total kWp AgriPV (kWp): 0.0 kWp. (= size of ha AgriPV to install × kWp/ha)

Cost per Wp of PV-panels and inverters (€): Including inverters, cables, installation but excluding support structure. Usually in range between 0.25€-0.50€/Wp

Cost AgriPV installation (excluding support structure) Cost/Wp can be changed in 'Advanced parameters'

Cost PV installation: 0 €. Cost AgriPV installation including PV panels, inverters, etc. but excluding support structure.

Cost AgriPV Support Structure Default height and cost extra height can be changed in 'Advanced parameters'

Distance between rows of AgriPV setup (m): Assumption: structure is installed for above defined #ha, for full lenght of the area, and with here defined row-to-row-distance.

Total meter AgriPV support structure needed: 0 m. = Total ha * 100m * (100m / row-to-row-distance)

Cost support structure per meter (€): Cost support structure per meter structure for AgriPV, for the default height mentioned in 'advanced parameters'.

Height of support structure (m): Will have an impact on price if different from default height mentioned in the 'advanced parameters'

Total cost AgriPV support structure: 0 €. Total cost taking into account total meter and height of support structure.

Other costs/income

AgriPV upfront other costs(-) / income(+) (€): Could be inspection costs (-), subsidies (+), ... If several items, make first the sum of all items.

AgriPV yearly other costs(-) / income(+) (€): Could be yearly extra taxes (-), yearly subsidies (+), ... Take into account that maintenance costs are already automatically calculated (maintenance cost per kWp can be changed in the 'advanced parameters'. If several items, make first the sum of all items.

Crop impact

Ton crop per ha (ton): How much ton crop per ha per year without impact of APV

Euro per ton crop (€):

Relative crop yield (%): Gives an estimation of the relative crop yield in agrivoltaic conditions compared to a reference area without agrivoltaics (100 = no impact)

Total crop impact (€): 0 €. Total euro impact of installing AgriPV on defined area (+: positive effect, -: negative effect)

Shift when year peak in kWh takes place

Shift kWh consumption (days): The used default profile has a peak kWh consumption in September. If this default profile is used, with how many days does the kWh-consumption-profile (and thus the peak) has to shift: forward in time: +, backward in time: -.

Advanced parameters (optional)

ADVANCED

AGRI-PV

Default height of an APV installation (m): Default height needed to be able to calculate extra costs if higher structure

Percent price increase above default height (%): With how much does the price of the support structure increase/decrease (per meter) if height is higher/lower than default.

Fill in all €-amounts excluding VAT

PV

System losses (%) & resampling: Default 8% instead of the 14% proposed by PVGIS, as the degradation of PV panels is calculated separately.

Estimated Production (in kwh) per installed Wp in East direction: 894 kwh/kwp (with 35% slope of PV-panels) according to PVGIS for Ghent, Belgium. 8% system loss instead of proposed all-in 14% because loss of panel degradation is calculated separately.
Estimated Production (in kwh) per installed Wp in South direction: 1120 kwh/kwp (same remark East)
Estimated Production (in kwh) per installed Wp in West direction: 881 kwh/kwp (same remark East)
Estimated Production (in kwh) per installed Wp in North direction: 589 kwh/kwp (same remark East)
Min Power of Inverter (kw): Inverter only starts functioning when sufficient solar production
Power Warranty PV After 1 Year (in %): Cfr datasheet PV panel. Often 98 or 99%
Power Warranty PV After 25 Years (in %): Cfr datasheet PV panel. Depending quality PV panel, often between 85% and 90%
Fix Price for PV Installation: Amount that will be charged irrespective of the size of the PV installation. Variable price comes on top of this fix price.
Variable Min Price per Wp for PV: Total price PV = Fix price + installed Wp * variable price (which is pro rata Wp compared with size for Max-Min price)
Variable Max Price per Wp for PV: Starting price for small PV-installation. Fix price will be added.
Size for Minimum PV Price (Wp): As of how much installed Wp will the minimum price per Wp be used. Fix price will be added.
Yearly Maintenance Cost per kwp (euro): Cleaning, small checkup, ...

Replace Inverter after (Years): 13y = 1 replacement in 25y

EMS

Fix Price for EMS: Only fix price for EMS. Could be more expensive for more complex connections
Yearly Maintenance Cost EMS (euro): Cost for making adaptions to the EMS, small issues, ... Will probably be higher if also steering on dynamic tariffs
Replace EMS after (Years): 13y = 1 replacement in 25y

Battery

Battery Min State of Charge (in %):
Battery Max State of Charge (in %):
Battery SOC at Start (in %):
Battery Charge/Discharge Efficiency (in %): Roundtrip efficiency: how much energy is lost by one time fully charging and fully discharging the battery
Battery Degradation per Year (in %): With how much is the total capacity of the battery declining per year
Battery Charging Power (% of Capacity): For a lot of batteries it is correct that the (dis)charging capacity is a correlation with the total capacity in kwh
Battery Discharging Power (% of Capacity):
Battery Minimum Power (kw): To avoid very small charge/discharge changes
Fix Price for Battery (euro): Amount that will be charged irrespective of size Battery.
Variable Min Price Battery per kwh: Total price Batt = Fix price + installed kwh_batt * variable price (which is pro rata Wp compared with size for Max-Min price). Does also take Bebat into account (Li-ion: 2,89€/kg, SaltWater: 1,27€/kg)
Variable Max Price Battery per kwh: Starting price for small batteries. Fix price will be added
Size for Minimum Batt Price (kwh): As of which size of the battery will the minimum price be paid. Fix price will be added.
Yearly Maintenance Cost Batt (euro):

Replace Battery after (Years):

Financial

Reference Rate (in %): Used for calculating NPV, OLO 25y is a good option. De Tijd OLO 25j
Inflation (in %): StatBel Inflatie

Financial - energy

Fixed Cost – Supplier (€/year):
Groene Stroom Certificaten – €/kwh: Cost charged by supplier. Cfr VREG
WKK Certificaten – €/kwh: Cost charged by supplier. Cfr VREG

Financial - distribution Fluvius Distribution Costs

Cost Toegangsvermogen - €/kVA/jaar enkel bij aansluiting >400V
Maandpiek - €/kw/year enkel bij aansluiting >400V
Door gebruiker opgegeven Maandpiek enkel bij aansluiting >400V. Voor automatische berekening = 999
Tarief voor overschrijding toegangsvermogen - €/kw/year enkel bij aansluiting >400V
Door gebruiker opgegeven Overschrijding Toegangsvermogen enkel bij aansluiting >400V. Voor automatische berekening = 999
Capacity tariff (average month peak) - €/kw/year enkel bij laagspanningsaansluiting (<=400V)
Distribution Cost Demand – €/kwh:
Distribution Cost Injection – €/kwh: 0€/kwh for residential customers with inverter <= 10kVA Fluvius Distribution Costs for Injection
Tarief voor overschrijding afname reactieve energie - €/kVArh: not yet included in calculations. Only applicable if >400V
Databeheer - €/year: (no VAT): 0€ residential customers, 9.88€ non-residential low voltage, 188.35€ medium voltage, 1,098.73€ high voltage. Assumption: only 1 access point for demand and injection!
Openbare dienstverplichtingen – €/kwh:
Toeslagen – €/kwh:

Financial - Taxes & Levies

Vlaamse bijdrage Energiefonds (€/year): (no VAT): per month: 0€ residential customers, 9.88€ non-residential low voltage, 188.35€ medium voltage, 1,098.73€ high voltage.
Federale Energiebijdrage – €/kwh: same tariff for residential/non-residential customers
Bijzondere Accijnzen – €/kwh: 0.04748€/kwh for residential customers up to 20.000kwh

Open this box to calculate results/graphs with user defined pricing of hardware:

(If you want automatic pricing to be applied, use the box below this one.)
Here you can enter your own total hardware price(s). As a consequence only a fix price is used for the above mentioned size of PV and battery (at least one of both should be > 0). If you want EMS-price to be taken into account, make sure to change also the option EMS-settings above in 'Simulate EMS Impact' above (at least one parameter should be > 0).
Important for the current version of this website: the impact of batteries only considers the improvement of self-consumption, and does not include the potential benefits of managing charging and discharging based on dynamic tariffs

Total PV investment price (€): Total up-front PV investment (modules, inverter, mounting, cabling, VAT if applicable) for the size entered in Size PV to be installed (in Wp) above.

Of which inverter price (€): This inverter price is part of the total PV investment price above and is used for replacement cost. If = 0 then also replacement cost = 0.

Total EMS investment price (€): Total up-front price of the Energy Management System (EMS). This replaces the automatic FIX_PRICE_EMS when you use the button below.

Total BESS investment price (€): Total up-front price of the battery system (BESS), for the size entered in 'Size battery to be installed (in kWh)' above. When using the button below, this replaces the automatic battery pricing model.

Use this box to calculate results/graphs with automatic pricing of hardware (+ extra graphs):

The pricing parameters of hardware costs can be changed in 'Advanced parameters' above.
Important for the current version of this website: the impact of batteries only considers the improvement of self-consumption, and does not include the potential benefits of managing charging and discharging based on dynamic tariffs.

(Heatmap grid (optional: change stepsize))

Define custom step sizes for the NPV heatmap axes. Leave both fields empty or type none to use the automatic step sizes based on yearly kWh demand.

Heatmap PV step (kWp)

Heatmap battery step (kWh)

Calculation in progress. This can take several minutes, especially when optimizing PV/Battery and creating the NPV Heatmap. Please wait...

Batch analysis

This tab is in development.

You can choose an already existing excel file with chosen values for the parameters and then change the boxplots/distribution graphs. Click on 'Parameter Values' if you want to see an overview for that file

I you want to make a new simulation and with new defined parameter values, make sure to first fill in the "Simulation-Plugin" tab and adapt all the parameters to the values you want the 3D-plot, boxplot and distribution graph to work with. Minimum to fill in: Size and Price of PV and/or battery. The generation of the batch will take 10 minutes for the combined-profilesets, and 2 minutes for the other profilesets.

Important: this analysis uses the current input values from the Simulations tab. If you want different parameters, first adjust them in Simulations, then come back here and run the batch.

Use existing Excel

Run batch (create new Excel)

Tip: in Use existing Excel you can pick any Excel file (independent of the selected Profileset).

Profileset:

X axis:

Y axis:

Z axis:

Boxplot 1:

Boxplot 2:

Boxplot 3:

Fluvius Profiles

Static overview per profileset (baseline: extra Wp=0, batt=0, EMS=0)

Profileset: Sort by: Order: