Use more of your solar power
We align solar PV, storage, heating and charging with your actual energy use.
Solar PV · Battery storage · Heat pumps in Pfäffikon SZ Generate solar power.
Get more from it.
Martin and Patrick Prünster combine their expertise in one carefully planned energy system. Helping your solar panels, battery, heating and electric car work together.
- Free project check, reply within 2 working days
- One contact from planning to commissioning
- 23 years of electrical engineering and around 18 years of heating & control technology
Local and personal · Schwyz, Lake Zurich & Glarus
Two brothers. One thoughtful system.
Martin PrünsterElectrical engineeringPartner Voltalps
Patrick PrünsterHeating & control technologyPHT Energietechnik
Your advantage with PHT & Voltalps
Individual devices. More value together.
Manage surplus intelligently
Our server-based control directs available solar power to compatible devices according to demand and priority.
One coordinated service
PHT and Voltalps plan and deliver together. You get dedicated contacts and direct coordination.
Plan for tomorrow
Integrate existing equipment and consider interfaces for future additions from the start.
Our expertise in practice
Your solar power. Where and when it matters.
Our server-based surplus control combines measurements, solar forecasts and your needs. Compatible loads are controlled by agreed priorities – from hot water to your electric car.
MeasureDistribute intelligentlyOptimise in operation
Electrical and heating expertise work hand in hand: we check your devices’ interfaces and optimise their interaction using real operating data.
Solar funding 2026CHF 1,800–12,000*Example from 5 to just under 30 kWp
Funding at a glance
Pronovo pays fixed contributions per kWp for typical rooftop and integrated systems. Local grants and a possible tax deduction may be added.
*Guide value from 5 to just under 30 kWp: rooftop CHF 360/kWp, integrated CHF 400/kWp. Lower capacity rates apply from 30 kWp. Eligibility and the final amount are confirmed by the relevant authorities.New reference
Solar PV in practice
Three selected views of completed solar PV projects.
Services
What PHT delivers
Six clear areas. Choose the relevant topic for details.
Solar PVAssess the roof, plan the system and generate solar power.Learn more →
Battery storageStore solar power and use it later.Learn more →
Heat pumpRun heating and hot water on your own solar power.Learn more →
EV chargingConnect the wallbox, solar surplus and load management.Learn more →
Solar surplusDirect energy to heat, EV charging or flexible loads.Learn more →
Mining and heatGenerate computing value and recover useful heat.Learn more →How it works
Three steps to the right solution
Show the project
Send the address, consumption and photos.
Plan the solution
PHT checks the roof, technology and useful extensions.
Deliver it well
Coordinated, understandable and personally supported.
PHT · Regional
Regionally planned. Personally available.
PHT Energietechnik supports projects in Pfäffikon SZ, Freienbach, Wollerau, Lachen, Schwyz, around Lake Zurich and in Glarus.
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.
How quickly does PHT respond to an enquiry?
PHT will contact you personally by phone within 2 working days. If you like, you can send your electricity bill and photos of the roof, meter cabinet and plant room directly via WhatsApp – this speeds up the initial assessment.
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.