User manual

1 · Signing in

The application lives at app.siteenergy.hu. You sign in with an e-mail address and password, which we send to the contact address on the order when the subscription is activated.

• We do not know your password — only its cryptographic hash is stored. If you forget it we set a new one; the old one cannot be recovered.
• Signing in opens a session. After 30 days without use it expires by itself.
• Sign Out logs you out. Before leaving, the program flushes pending changes, so it may pause for a moment.

Language

The flag button in the header switches between four languages: Hungarian, English, German and Polish. The choice is tied to the device, not the account, so the same account can be used in different languages on different machines.

2 · Locations

After signing in you land on the Locations screen. A location is one site, one property, one project — all data (consumption, systems, demands, planned developments) belongs to a location, and locations are independent of each other.

• ＋ Add Location — a name is enough; the address comes next.
• Click a card to enter the location.
• ✕ in the corner deletes the location and all its data. This cannot be undone.

With at least two locations, the grid also offers creating an energy community (see chapter 14).

3 · The location data sheet

Inside a location, a pencil (✏) sits next to the name in the header — that opens the data sheet. This is the most important settings page: coordinates, every price and the CO₂ factor come from here.

Owner and address

Private person and company details live in separate blocks; the company VAT number appears on the MEKH filing cover. On the site address, the “Same as owner address” checkbox copies and locks the owner's address — including the country, which also drives tariff filtering.

Coordinates

After you enter the address the geocoder resolves the coordinates, or you can click the exact point on the map. Without coordinates there is no solar production and no weather data — this is the single most common place to get stuck.

Exchange rate, CO₂, prices

EUR→HUF rate	390 by default, editable, and the official ECB rate can be fetched. The euro is the canonical value; forint fields mirror it, so changing the rate recalculates every forint figure.
CO₂ emission factor	kg CO₂ per kWh of electricity. The ? icon opens a reference table by country and year — read off the right one and type it in.
Electricity price	Fixed or stock (hourly) pricing. Stock pricing also needs an hourly price table uploaded, otherwise every hour falls back to the fixed price — and you are warned about it.
Feed-in price	The settlement price for energy exported to the grid. Under gross settlement a separate export price can be set.
Gas / district heat price	Only needed if you have such a demand. District heat has its own CO₂ factor (0.27 kg/kWh by default).
System usage and merchant fee	Fixed monthly items. They also appear in the payback calculation.

Tariff catalogue

Thirty tariffs from four countries (HU, PL, AT, DE) are selectable; the list is filtered by the location's country, and a “show all countries” checkbox lifts the filter. Hungarian tariffs carry verified prices; for non-Hungarian entries the structure (components, zones, VAT) is real while the prices are reference values worth confirming against the supplier's price sheet.

Fetching the weather

In the “Wind and Outdoor Temperature Data” section, enter the measurement year and run the fetch. A single request downloads the hourly outdoor temperature and the 10 m wind speed and writes them into the data table.

4 · The module picker

A location's main screen groups the modules three ways:

• Existing System — what is already there. The consumption curve comes first, because it is the first step of the workflow; then solar, battery, chimney, heat demand, hot water, buildings.
• Planned Development — what you want to examine: planned solar and battery, flue-gas heat recovery, thermal storage, heat pump, electric vehicle, building-envelope upgrade, solar thermal, CHP, wind, hydrogen.
• Analysis — KPI dashboard, energy flow calculation, reports.

The badge at the bottom of each card shows how many items exist. Dimmed, unclickable cards are either waiting on a prerequisite (“Add a demand first”) or not included in your plan — in the latter case clicking says so.

5 · Existing systems

Solar

One card per system: peak power, tilt, azimuth, system loss and maximum inverter output. The last one is a real clip: hourly production is capped at that value, and the program reports how many hours were clipped.

The ⚙ Fetch and calculate hourly data button downloads hourly production for the location's coordinates and writes it into the data table. Run it once per system.

Battery

Capacity, C-rate (charge/discharge power relative to capacity), minimum state of charge. If you have an existing battery that was already running in the measurement year, upload its state-of-charge and discharge logs in the EFC as well — the system then uses actual behaviour instead of simulation.

Chimney

The data needed to size flue-gas heat recovery (flue gas volume flow, temperature). Skip it if you are not planning recovery.

6 · Energy demands

There are three demand types and all follow the same logic: you give the annual demand, and the system distributes it across the hours of the year, then writes the hourly columns into the data table.

Technological heat	Annual kWh, heater type (gas, electric, wood, oil, heat pump, district heat) and efficiency. For gas/oil/wood a native-unit field also appears (m³, litre, kg), two-way linked to the kWh value.
Hot water	Annual litres, hot-water temperature and mains water temperature (13 °C by default). Energy demand is derived from these.
Buildings	Heating and cooling basics, heating unit type, COP at +7/+2/−7 °C for heat pumps and EER at +7/+18 °C for cooling. Efficiency is computed hour by hour as a function of outdoor temperature — never from a single annual average.

Every card has a Calculate hourly data button. That is what writes the hourly columns, and until it has run, everything built on it (EFC, heat-pump evaluation, the MEKH area breakdown) works from incomplete data.

7 · Consumption curve (T-curve)

This is the system's most important input. What you load is grid draw in hourly resolution — not total consumption.

Format	.xlsx, .xls, .csv
Resolution	Hourly or finer; finer data is summed per hour
Date column	Its header should contain date, time, stamp, datum or idő
Value	In kWh; multiple numeric columns are added together
Decimal mark	Comma or point; semicolon-delimited, header-less supplier exports are recognised too

After the import a floating box shows the file name and the annual total, with a monthly bar chart underneath. Loading another file overwrites the previous one.

8 · Energy flow calculation (EFC)

The EFC reconstructs: from measured grid draw and modelled solar production it works out what happened hour by hour — how much went to self-consumption, how much to the grid, how the battery behaved, and what actual total consumption was.

What you can upload — and what it adds

Inverter export log	Makes the solar self-consumption/feed-in split measured rather than rule-based. A dropdown selects which series the file holds (self-consumption / battery charge / feed-in) — it can be loaded three times from separate files. This adds the most accuracy.
Battery SoC and discharge log	Actual behaviour of an existing battery instead of simulation.
Hourly prices	For stock contracts. Without them, stock mode still uses the fixed price.
Pre-install consumption	If the solar system went up during the measurement year.

Uploaded feed-in data is validated: negatives are zeroed, values above the combined inverter and battery power are clamped, and if more than 5% of hours needed fixing the entire upload is rejected (the engine then computes feed-in itself). The status line tells you which happened.

The result

After the run a green status bar appears and expands downwards into a monthly chart (grid draw, total consumption, solar, feed-in, other sources). Hovering a line shows exact values in a tooltip; clicking the legend toggles series. Below it the annual summary: self-consumption, self-sufficiency, energy cost (with a €/Ft toggle), CO₂ and confidence.

Results can be downloaded as JSON and XLSX — that requires export entitlement.

9 · Planned developments

Eleven development types can be added, each on its own card. The logic is the same everywhere: you enter the technical and cost data, then Evaluate / Calculate computes the annual saving from a full hourly simulation and puts NPV, IRR and payback next to it.

Planned solar	Candidate systems; the optimizer searches their size
Planned battery	Capacity and C-rate range for the optimizer to pick from
Heat pump	Linked to an existing demand; hourly via COP(T)
Building envelope upgrade	One per building; the new demand is distributed with the original's profile
Electric vehicle	Residential (one car) or corporate fleet; smart charging on solar surplus and cheap hours, optional V2G
Solar thermal	Annual yield, distributed hourly along the solar profile
Flue-gas heat recovery	From the chimney data; recovered heat as an hourly column
Thermal storage	Charge and discharge simulated hourly; charges in cheap hours
CHP	Electricity side hourly, heat and fuel economically
Wind turbine	From the 10 m wind speed, with a power curve
Hydrogen	Charge–discharge arbitrage on hourly prices

10 · Optimizer

It starts from the dark banner at the bottom of the planned-development page (“Goal Selection & Optimization”). Five goals are available:

1. Black-out backup — what battery carries a given load for a given time.
2. Peak shaving — reducing the demand charge.
3. Income / NPV — maximum net present value, with discount rate, lifetime and degradation.
4. Self-sufficiency cost optimum — a coloured matrix: rows are battery kWh, columns solar kW, each cell the lowest total annual cost. The optimum cell is outlined.
5. Basket — tries every combination of the enabled developments and finds the best package. A capital budget can be set.

For goals 1–4 a checklist on the left selects which developments to include. ⚡ badged items couple hourly (they reshape the consumption curve); € badged ones only economically. If an hourly column is missing for an item, the program names the Calculate you need to run.

After a run, 📄 Report opens a two-page optimization report with the inputs and the detailed result.

11 · KPI dashboard

The location's current state on one screen: consumption, self-consumption, specific yield, battery throughput, cost, CO₂, self-sufficiency. Denominators for the specific indicators (floor area, headcount, revenue) are set here or on the ISO 50001 panel — the report uses the same ones.

12 · Reports

The printable system report consists of the following chapters, each appearing only when there is data for it:

• Cover and executive summary
• Economics, sensitivity analysis (tornado chart)
• Robustness (P50 / P90)
• Inventory of planned technologies
• ISO 50001 EnPI — energy baseline, indicators, significant energy uses, SMART target
• CO₂ balance
• ESG — Scope 1 and Scope 2 (location- or market-based), avoided emissions, intensity
• Subsidies and net capital cost
• The best development package (if an optimization has run)

The header offers ⚙ Details (metadata), 💶 Subsidies, 📊 ISO 50001, 🌍 ESG settings bars and a €⇄Ft toggle. Output: print/PDF and a standalone HTML file.

13 · MEKH filing

The Hungarian energy-expert annual report (Government Decree 122/2015, § 7/A) is produced as a separate, Hungarian-language report. The 🇭🇺 MEKH button opens the editor bar for the filing's own fields: reporting period, POD identifier, inverter details, expert name and registry number, list of measures, audit findings, sub-metering, area breakdown.

Its chapters: cover, table of contents, company profile, annual energy balance (with previous year and change), organisational/technological breakdown, specific indicators, energy-saving measures, audit, sub-metering, charts, appendices (monthly breakdown, methodology, HMKE data sheet).

The public / internal switch hides internal appendices, and the table of contents and page numbering follow automatically.

The filing is computed from your own data; where data is missing it prints “— kitöltendő —” (to be filled in) rather than an estimate.

14 · Energy community

Two or more locations can be linked at hourly resolution. Each hour the system matches feed-in from one location against grid draw at another, and shares only when the match is better for both parties than the grid — so the community never makes anyone worse off.

Settlement is parametric: grid-fee discount (with four presets), net grid fee, optional internal price, setup and operating cost. The result: shared kWh, community and net benefit, CO₂, a per-member breakdown and monthly charts.

A location can belong to one community at a time. The module is part of the Complex plan.

15 · Your data and saving

• Automatic saving. Every change is saved to your account with a few seconds' delay. If the network drops, pending changes are held in the browser and replayed at the next sign-in.
• Project save/load. A location's full state can be exported and restored as a file.
• ⬇ Export JSON — the location's data for machine processing.
• The data table. Calculations write into a shared hourly table (system_hourly_data) with a fixed column order. This table is what the reports and the optimizer read.
• Client data is your data. For it, you (or your employer) are the controller and Tápió Építő Kft. acts as processor — the details are in the privacy notice and the annex to the Terms.

16 · Plans and limits

Entitlements travel with the subscription and apply automatically after sign-in. Anything you are not entitled to appears dimmed and, when clicked, explains why it is unavailable.

Trial	Every module can be tried, but saving and export are unavailable; reports can be viewed on screen and carry a “TRIAL” watermark. The trial ends by itself and never turns into a subscription.
Basic	Entry-level sizing: existing systems, demands, consumption curve, EFC, system report.
Advanced	For consulting work: planned solar, battery, heat pump, envelope, electric vehicle, optimizer (goals 1–4).
Complex	The full toolkit: every development type, basket optimization, MEKH filing, ESG, ISO 50001, energy community.

The exact contents can be compared on the pricing page.

17 · Troubleshooting

The system deliberately tells you when something is missing rather than quietly estimating. So the following are not errors but tasks.

“Download the outdoor temperature first”

Hourly outdoor temperature is missing. Location data sheet → measurement year → fetch the weather. Once per location.

“Enable at least one distribution”

Distributing the annual demand needs at least one distribution: monthly, weekly or daily. Monthly is on by default; switch it back on if you turned it off.

“T-Curve data not found”

No consumption curve is loaded for this location, or the import was not saved. Load it again and wait for the confirmation with the row count.

“solar split is MODELED (no export data)”

There is no inverter export log, so the solar self-consumption/feed-in split is rule-based. The result is usable, but self-consumption is typically overestimated.

“stock pricing selected but no hourly prices linked”

Stock pricing is set but no hourly price table is present. Either upload hourly prices or switch the location to fixed pricing.

The area breakdown differs from the annual balance (MEKH)

The area breakdown is computed from the card settings, the annual balance from the hourly columns. A difference above 2% means “Calculate hourly data” has not run on one of the demands.

A development card shows a “stale calculation” flag

The demand or building it links to has changed since. Re-run the development's evaluation so the saving is computed from fresh data.

A result does not show up on my other machine

Saving runs with a few seconds' delay. If you closed the browser right after a change, wait a moment and refresh. The language setting is deliberately tied to the device and never syncs.

Did not find what you were looking for? Write to info@siteenergy.hu — we extend the manual based on real questions.