Solar PV · Battery storage · Energy optimisation
Why buy electricity
when your roof can produce it?
PHT Energietechnik GmbH in Pfäffikon SZ combines solar PV, battery storage, heat pumps, hot water and energy management in one clear, coordinated system.
Services
Your energy solution in clear service areas.
From an initial solar check to a coordinated energy system, each page answers a specific planning question.
Solar calculator
Estimate PV potential, indicative cost and payback period online.
Learn more → 01Solar PV systems
Plan roof layout, modules, inverter and self-consumption.
Learn more → 02Battery storage
Use solar power in the evening and manage peaks.
Learn more → 03Heat pump & hot water
Use PV electricity for heating and thermal storage.
Learn more → 04Solar surplus control
Prioritise the building, battery, cylinder, EV and other loads.
Learn more → 05Energy optimisation
Connect metering, tariffs and loads in a practical operating strategy.
Learn more → 06Integrated system
Coordinate PV, storage, heat and control with room to expand.
Learn more → →Project check
Send the address, consumption and photos; PHT will assess the next step.
Learn more →Quick answer
What PHT optimises for owners and businesses
A good installation is not sized from roof area alone. The load profile, heat demand, local tariffs, existing equipment and future additions all matter. PHT organises these factors, defines priorities and selects components that work together in everyday operation.
Serving Pfäffikon SZ, Freienbach, Wollerau, Lachen, the Canton of Schwyz, the Lake Zurich region, Glarus and, depending on the project, wider areas.
- 📍
- Churerstrasse 158, 8808 Pfäffikon SZ
- ☎
- +41 77 278 15 83
- ✉
- info@pht-energie.ch
Energy system
One energy system instead of separate devices.
The best sequence depends on the building. A typical order is to use power directly, charge an appropriately sized battery, activate hot water or the heat pump, and only then allocate genuine residual surplus to other flexible loads or export.
GEO · Local
Regional planning with personal support.
PHT Energietechnik is based in Pfäffikon SZ and serves projects in Freienbach, Wollerau, Lachen, the Canton of Schwyz, the Lake Zurich region, Glarus and neighbouring areas. Planning considers the relevant grid operator, the actual building and measured consumption.
Learn more →Guides
Guides
The articles combine technical principles, decision tools, regional planning and interactive calculators without generic promises of returns.
Solar surplus, dynamic electricity prices and Bitcoin mining
Detailed Swiss guide to optimising solar surplus with batteries, heat, dynamic tariffs and optional Bitcoin mining.
Learn more → →Dynamic electricity prices in Switzerland
Guide to dynamic tariffs, smart meters, all-in cost, batteries, heat pumps and load management in Switzerland.
Learn more → →Compare solar surplus with your own assumptions.
Compare export, battery storage, heat pumps, hot water and optional Bitcoin mining using your own solar-surplus assumptions.
Learn more →Frequently asked questions
Frequently asked questions
What does PHT need for an initial assessment?
The address, annual electricity consumption, photos of the roof, meter cabinet and plant room, plus information on the current heating system and future loads such as a heat pump or electric car.
Is the solar calculator embedded on the home page?
No. To keep the home page fast and uncluttered, the full calculator is available only through the menu and dedicated buttons.
Can PHT improve an existing installation?
Yes. Existing PV can be extended with storage, energy management, hot-water integration, a heat pump or other controllable loads.
Can the system be expanded later?
The design considers inverter capacity, interfaces, physical space, metering and controls from the outset, reducing later alterations.
Would you like to know what is possible for your property?
Your address, annual consumption and photos of the roof, meter cabinet and plant room are enough for an initial assessment.