01Project-specific integration
Different models. Shared control.
Coordinate different inverter models through a shared controller, including compatible parallel configurations. One strategy for the whole installation.
SOLAR PLANT CONTROL AT ELECTRICITY MARKET PRICES
More control.
A better plan.
Manage your photovoltaic (PV) plant and sell electricity at market prices. Plan for today and the next 3 days. Monitor inverters, batteries and individual cells with Telesolar — an energy management system (EMS) tailored to your plant.
From €3 / month per site · Installation and setup by our team
1 month right to cancel
DEMO CONFIGURATION
Solar stringsDifferent tilts and orientations
Different invertersOne shared strategy
TelesolarShared controller
Batteries + BMSData down to each cell
GeneratorAutomatic / manual
Today + 3 daysplanning horizon
Unlimitedhistory with Pro
3–8 modulescompact enclosure
1 monthright to cancel
We start with the equipment you already have.
What would you like to achieve?
Choose a goal. We will include it in your enquiry and start with what matters most to you.
MORE THAN MONITORING
One system. The whole picture.
Remote control and monitoring of your PV plant: inverters, solar panels and energy storage in one dashboard. Export schedules follow your power limits, prices, minimum charge and days off.
02L / XL · batteries
Inside your battery.
From L, get direct BMS data, live cell readings, deltas and diagnostics. Smart control and monitoring for up to 3 batteries with L, up to 9 with XL, and unlimited batteries with Pro.
03S / M · market prices
The right time for your energy.
S stops exports below your chosen price threshold. M adds control that follows electricity market prices and notifies the buyer when you deviate from the schedule.
04M / L / XL · schedules
Schedules that follow you.
M includes a basic export schedule. L adds a detailed schedule using consumption, the previous day’s battery charge and a 3-day solar forecast — for up to 2 strings, tilts and orientations. XL expands the forecast to 4 of each.
05Flexible rules
Days off are part of the plan.
Saturday, Sunday or both. Sunset to sunset, 00:00 to 24:00 or hours of your choice — with a calendar based on your plant’s location.
06XL · maintenance
Care for every cell.
Set service intervals for top balancing, track cell differences and plan battery maintenance.
07Depending on equipment
Your generator is part of the picture.
Schedule generators and independent chargers with operating windows, priorities and energy quotas. Automatic control or manual activation.
08Pro · custom project
Grows with your installation.
Pro offers unlimited history, strings, tilts and orientations, with panel-level forecasting. We add custom algorithms, API integrations and the features your project needs.
A LOOK INSIDE THE PLATFORM
Energy moves. You see how.
Solar generation, home, battery and grid — connected in one clear picture. Direction shows where energy goes. Speed follows the power on each cable relative to a 15 kW maximum.
15 kWp solar · 15 kW inverter · 16 kWh battery
Movement is disabled according to your device settings.
Demonstration · example data12:30
Grid export7kW
Inverter57%of 15 kW
Solar
12.6 kWGenerationGrid
7 kWGrid exportInverter
8.5 kWAC outputHome
1.5 kWConsumptionBattery
3.7 kWCharging53.2 V · 69.55 AYour home runs. Your battery charges.
Solar powers the home, charges the battery and sends the surplus to the grid.
WITH YOU, ON EVERY SCREEN
Your plant.On your screen.
Web dashboard for computers and tablets in every plan. Android and iOS apps from M upwards, Apple Watch and Wear OS access from L upwards.
Discuss access to your plant ↗Web dashboard
In every plan
iOS
From M · iPhone and iPad
Android
From M · phone and tablet
Apple Watch / Wear OS
From L
THE TECHNOLOGY BEHIND TRUST
Secure connection. Verified command.
Encrypted communication between your plant and the platform, with remote commands verified before execution.
Telesolar platform
Signs remote commands
HTTPS / TLSEncrypted connection
On-site controller
Verifies before execution
Ed25519 digital signature
The controller checks the signature, purpose and recipient of remote commands and configurations.
Validity and sequence
Expiry times, delivery sequence and stored results protect against executing expired commands or running them again.
On-site protection
Local protective shutdown works independently of the server. The controller monitors the conditions for safe operation at your site.
CLEAR FROM DAY ONE
Choose how far you want to go.
From protection against low prices to full battery control and custom integrations. Choose the step you need.
One-time · equipment + installation
Controller Standard
For S and M
Equipment 100 € + Installation, setup and training 200 €
Promotion −50% until 31 December 2027
One-time · equipment + installation
Controller Pro
For L, XL and Pro
Equipment 300 € + Installation, setup and training 400 €
Promotion −30% until 31 December 2027
Scroll horizontally to compare S, M, L, XL and Pro. You can also use the arrow keys.
Low-price protection
3 €for the first inverter / month
+ €1.50 for each additional inverter
Controller Standard
- Stop exports below a chosen electricity market price
- Connection status and last confirmed action
- Basic alerts when an action is not completed
- 1 month of history
Follow electricity market prices
6 €for the first inverter / month
+ €3 for each additional inverter
Controller Standard
- Everything in S
- Control that follows electricity market prices
- Basic export schedule
- Batteries supported, without monitoring or smart control
- Android and iOS apps
- 12 months of history
- Notify the electricity buyer of intervals that deviate from the schedule
FOR ACTIVE MANAGEMENT
LSmart battery management
12 €for the first inverter / month
+ €6 for each additional inverter
Controller Pro
- Everything in M
- Smart control, monitoring and diagnostics for up to 3 batteries
- Direct BMS data, cells, deltas and detailed charts
- Apple Watch / Wear OS access
- Detailed schedule using consumption, the previous day’s battery charge and the solar forecast
- 3-day solar forecast: up to 2 strings, 2 tilts and 2 orientations
- Days off and time windows of your choice
- 24 months of history
More batteries. More possibilities.
24 €for the first inverter / month
+ €12 for each additional inverter
Controller Pro
- Everything in L
- Smart control, monitoring and diagnostics for up to 9 batteries
- 3-day solar forecast: up to 4 strings, 4 tilts and 4 orientations
- 5 years of history
- Planning with a minimum battery charge
- Service intervals for top balancing
- Automatic delivery of forecast schedules to the electricity buyer
Your custom solution
On request
Controller Pro
- Everything in XL
- Unlimited history
- Forecasting for unlimited strings, tilts and orientations, including at panel level
- Unlimited inverters and batteries
- Custom algorithms and API integrations
- SCADA telemetry and grid operator control, tailored to the project
- Reconcile export reports against our measurements
- EV charging, heat pumps and additional features for your goals
All prices include VAT.
Your estimated cost
Your quote is for plan M · Controller Standard
Monthly subscription6 €
Equipment + installation150 €
Total for the first 12 months222 €
Average monthly cost over 5 years, including equipment and installation8.50 €
Request a quote for this configurationTWO SYSTEM SIZES. ONE EXPORT STRATEGY.
What could Telesolar bring you?
Explore two plant sizes in Plovdiv with the same example prices: Standard with 15 kWp and one battery; Pro with 30 kWp and nine batteries. Batteries are already installed; we calculate the payback of the management system only.
01 / STANDARD · PLAN M
One battery. Export at a better time.
One existing 16 kWh battery with an assumed 15 kWh of usable evening exports. Standard follows the price and controls exports through the inverter; battery charging is preconfigured in the inverter itself.
Climate-based generation estimate 20,528 kWh per year
Adjust the example prices to match your contract.
Without export management
Generation is exported during the day. The existing battery does not shift exports to the evening.
- Revenue from energy sold
- —
- Buyer and balancing costs
- —
- Battery wear allowance
- 0 €
- M subscription
- 0 €
- Annual result after these costs
- —
With Telesolar management
With the selected settings, the inverter charges the battery from solar, while Standard directs exports towards the better price. Battery exports are limited to 15 kWh per evening.
- Revenue from energy sold
- —
- Buyer and balancing costs
- —
- Battery wear allowance
- —
- M subscription
- 72 €
- Annual result after these costs
- —
Additional annual result—per year
Management system payback—One-time Telesolar cost: 150 € · 6 € per month
Additional result over 5 years—After the one-time Telesolar cost
Energy with one battery
Direct exports —Evening battery exports —Storage losses —
Actually directed to batteries: — of generation, with a target of up to 90%; evening exports are lower due to losses
Assumptions and method
- One 16 kWh battery with an assumed 15 kWh of usable evening export energy. At 90% round-trip efficiency, this requires 16.67 kWh of solar energy.
- Standard controls exports according to price. Charging and discharging are preconfigured in the inverter; plan M does not include BMS monitoring or smart battery management.
02 / PRO · PLAN XL
30 kWp. Nine batteries. More possibilities.
A Pro controller and plan XL for 30 kWp of solar and nine existing batteries with 135 kWh of usable energy in total. This example assumes one 30 kW inverter. Smart control and BMS monitoring are included.
Climate-based generation estimate 41,056 kWh per year
Adjust the example prices to match your contract.
Without export management
Generation is exported during the day. The existing batteries do not shift exports to the evening.
- Revenue from energy sold
- —
- Buyer and balancing costs
- —
- Battery wear allowance
- 0 €
- XL subscription
- 0 €
- Annual result after these costs
- —
With Telesolar management
Up to 90% of daily generation is directed to the batteries when the price difference covers losses and wear. Power and time limits constrain the energy actually shifted.
- Revenue from energy sold
- —
- Buyer and balancing costs
- —
- Battery wear allowance
- —
- XL subscription
- 288 €
- Annual result after these costs
- —
Additional annual result—per year
Management system payback—One-time Telesolar cost: 490 € · 24 € per month
Additional result over 5 years—After the one-time Telesolar cost
Energy with nine batteries
Direct exports —Evening battery exports —Storage losses —
Actually directed to batteries: — of generation, with a target of up to 90%; evening exports are lower due to losses
Assumptions and method
- Nine existing batteries with an assumed total of 135 kWh usable export energy.
- In this example, charging is limited to 30 kW × 4 hours = 120 kWh of solar energy per day. At 90% efficiency, this means up to 108 kWh of evening exports, despite 135 kWh of usable capacity; solar yield can limit this further.
- Plan XL includes all nine batteries. The financial effect is calculated from the energy shifted at the entered prices.
Shared assumptions and sources
All Telesolar prices include VAT. Revenues are before taxes; market prices and deductions follow the entered scenario.
- Up to 90% of daily generation is directed to the batteries, with 90% round-trip efficiency.
- The model uses an average day for each month: a maximum of one cycle per day, a 15 kW inverter for Standard and an assumed 30 kW inverter for Pro, with separate four-hour charging and discharging windows. No grid charging or self-consumption is included. The monthly estimate is not an hourly simulation and may overestimate utilization in variable weather.
- Energy is shifted only when the price difference covers losses and the wear allowance. Otherwise, it is exported directly; the subscription remains a cost and there may be no payback.
- Generation is a PVGIS-SARAH3 climate-based estimate (2005–2023) for Plovdiv: 15 and 30 kWp respectively, south-facing, 35° tilt and 14% PV system losses. It is not measured generation from a specific plant.
- The comparison is against direct exports, not an already optimized or fixed evening schedule. It includes the entered deductions, subscription and wear allowance. Other plant costs are excluded.
- The five-year calculation assumes a constant annual effect and deducts the one-time cost once. Actual prices, weather, constraints and ageing can change the result.
Market context: average baseload price for 2025: 106.90 €/MWh. This average is not an hourly solar capture price and is not used as the daytime or evening price in the examples.
Give the system a try. With clear terms.
One month of peace of mind
You can cancel the contract within 1 month of activation. We refund the equipment costs and installation fee.
Platform quality guarantee
If a software fault is confirmed, you receive one additional month of free platform access. Our team handles diagnosis and resolution.
THE NEXT STEP FOR YOUR SITE
One strategy. Even more possibilities.
With Pro, we build custom integrations and features for your site — from flexible loads to SCADA and business systems.
01EV + solar
Electric vehicle charging
From solar surplus, at favourable times and within your site’s power limits. Integration with compatible EV chargers and OCPP, tailored to the project.
Pro · custom development02Flexible loads
Heat at the right time
Heat pumps, water heaters and controllable loads with priorities based on price, available energy and comfort. SG Ready and relays with suitable equipment.
Pro · custom development03Import limit
Peak demand control
Measurements at the grid connection and coordinated battery and load control to maintain a set import limit. A separate mode for reducing peak grid demand.
Pro · custom development04Escalation + teams
Alerts with clear responsibility
Extended notification channels, escalation to service teams and acknowledgements for lost connections, BMS deviations or missed schedules.
Pro · custom development05Forecasts + economics
Management that learns your rhythm
Self-learning consumption forecasts, adaptive reserves and battery cycle costs included in optimization.
Pro · custom development06Integrations + teams
Connected to your business
Custom APIs, MQTT, Home Assistant and webhooks; a shared view across multiple sites with owner, operator and installer roles.
Pro · custom development07Pro · SCADA
Connected to the grid dispatcher
Real-time SCADA telemetry and grid operator control through IEC 60870-5-104. For ER Yug (EVN), ERP Sever (ENERGO-PRO) and ERM Zapad (Electrohold, formerly CEZ), according to the operator’s requirements.
Pro · custom development08Pro · report analysis
Account for every kilowatt-hour
Analyze export reports from the grid operator or electricity buyer against our data. Compare periods and quantities, and identify missing data and discrepancies.
Pro · custom developmentGrid operator integrations follow the operator’s technical specification. Example technical requirements from ERM Zapad ↗
Choose a direction. We will prepare a tailored proposal for your site.
I want a solution for my site ↗OPEN TO YOUR EQUIPMENT
Different brands. One conversation.
We connect equipment from different brands for shared monitoring and control. We choose the integration for your installation.
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↗No matching brand. Contact us to check your model.
Your brand is missing? Discuss it with us. Discuss your project →
THE CHOICE GOES BEYOND A FEATURE LIST
Technology with a team behind it.
Compare the full scope: licence, controller, communication modules, installation, configuration and support. Telesolar brings these together in a tailored proposal for your site.
Installation and accountability
One team for the enclosure, communications and configuration.
Data you can rely on
Real measurements with visible delays and gaps.
Traceable control
Schedules, signed commands and controller acknowledgements.
Development around your goals
New features and integrations to meet your needs.
From market price to actual execution.
M follows market prices with a basic export schedule. L adds a detailed schedule using consumption, previous charge and the 3-day solar forecast. XL expands forecasting and adds automatic schedule submission.
- Market prices and forecasting
- Notifications and schedules for the buyer
- Signed commands and acknowledgements
TELESOLAR
Power supply
TS
Communication module
Communication module
3–8 module enclosureGALVANIC ISOLATION
Schematic illustration
DESIGNED FOR REAL INSTALLATIONS
Small enclosure. Big possibilities.
Our team installs an additional compact enclosure of 3 to 8 modules, housing the Telesolar equipment.
Industrial quality
DC-isolated communication modules with galvanic isolation of the communication lines.
- 01
Discuss
Equipment, goals, layout and plan.
- 02
Install
Enclosure, controller and communication modules.
- 03
Configure
Measurements, limits and schedules.
- 04
Stay by your side
Support and ongoing development.
PRACTICAL GUIDES FOR YOUR PV PLANT
Clearer decisions for your energy.
Three short guides to prices, schedules and batteries.
PRICES AND SCHEDULES
Manage a solar PV plant using electricity market prices
From a price threshold to a sales schedule: choose the right rules for your PV plant.
Read the guide PROTECTION AT LOW PRICESNegative electricity prices: when to limit PV exports
What to check before automatically limiting sales at low or negative electricity prices.
Read the guide STORAGE AND DIAGNOSTICSPV batteries: what BMS data tells you
State of charge is only the starting point. See how cell readings, temperatures and voltage differences complete the picture.
Read the guideGOOD TO KNOW BEFORE YOU START
Your questions, answered directly.
What is EMS control for a PV plant?
PV stands for photovoltaic. An energy management system (EMS) collects measurements from inverters and batteries and controls exports according to selected prices, power limits and schedules. Telesolar connects this software to a controller at your site.
Can a PV plant stop exporting automatically at negative prices?
Plan S stops exports to the grid below a set price threshold. M adds market price following. This limits exports in unfavourable intervals according to your site rules and electricity purchase terms.
What is the day-ahead market?
It is the electricity market for the following day. In Bulgaria, IBEX publishes its results. Longer planning horizons also use forecasts, which are updated as new prices become available.
Do you support EV chargers, heat pumps and other integrations?
Yes. With Pro, we develop custom integrations for your site.
Can I combine different inverters?
Yes. The controller coordinates different models, including compatible parallel configurations.
How do the plans manage batteries?
M can work in an installation with batteries, without monitoring or smart battery control. L includes smart control, monitoring and diagnostics for up to 3 batteries, XL for up to 9, and Pro has no limit. From L, you can see charge levels, cell voltages, temperatures, deltas and detailed charts using real BMS data.
How do you plan for today and the next 3 days?
M includes a basic export schedule. L combines consumption, the previous day’s battery charge and a 3-day solar forecast for up to 2 strings, 2 tilts and 2 orientations. XL expands this to 4 of each, while Pro offers unlimited configurations and panel-level forecasting.
What does peak shaving mean in Telesolar?
Here, the term refers to peak exports above a chosen electricity market price, within the set power limits and rules. Reducing peak grid demand is a separate function agreed for each project.
When does history start accumulating?
From activation and data collection. S retains 1 month, M 12 months, L 24 months, XL 5 years, and Pro offers unlimited history.
Which plans include apps and watch access?
Android and iOS apps are included from M upwards, with Apple Watch / Wear OS access from L upwards.
Do I need to log in to access plant data?
Yes. The public website contains only product information and illustrative examples. The dashboard, its files and plant data require a valid customer login.
How does installation work?
We install a compact 3–8 module enclosure, configure the service and provide training. Standard for S/M costs €100 for equipment + €200 for installation, setup and training — €300 in total. Pro for L/XL/Pro costs €300 + €400 — €700 in total. Until 31 December 2027, Standard is 50% off at €150 and Pro is 30% off at €490. All prices include VAT.
How are multiple inverters billed?
The monthly subscription for the first inverter and each additional inverter is: S — €3 + €1.50; M — €6 + €3; L — €12 + €6; XL — €24 + €12. There is no inverter count limit or monthly price cap. Pro is quoted individually. The calculator shows monthly and total costs including VAT.
Can the grid operator receive telemetry and regulate the plant?
Yes. With Pro, we offer real-time telemetry and dispatch control using IEC 60870-5-104. The integration follows the operator’s technical specification.
Can we check energy export reports?
With Pro, we offer import and analysis of reports from the grid operator or electricity buyer. We compare periods, quantities and prices with Telesolar measurements and highlight differences.
LET’S TALK ABOUT YOUR PLANT
Let’s start with your system.
Describe your equipment and goals. We will prepare a tailored quote for your plant.