Vitosolic 100, modelo SD1: Regulación Electrónica Bivalente Solar - Q-Tech® 2026

Vitosolic 100, model SD1: Bivalent Solar Electronic Control

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At Q-TECH, we apply the same clear rules for everyone: the law protects you, and when applied correctly, it protects us as well. By processing your purchase, you accept our General Terms and Conditions of Sale. If you are purchasing as a consumer (B2C), nothing stated herein limits the rights granted to you by mandatory law (RDL 1/2007, TRLGDCU): the 3-year legal warranty of conformity and the right of withdrawal under the terms and with the exceptions legally provided, which are detailed below. References to "B2B" apply only to businesses and professionals.

Your guarantees

  • Rights intact: 14 days of withdrawal from receipt for most products—subject to the legal exceptions you will see below, such as goods made to your specifications—and a 3-year legal warranty of conformity, under the terms of the TRLGDCU.
  • Conformity with the description: we guarantee that the equipment will correspond to the published technical description and what one could reasonably expect from it (arts. 115 et seq. TRLGDCU). Images and videos are for guidance only: the manufacturer may supply a more recent revision of the product or introduce minor aesthetic, packaging, or firmware changes, without this constituting a lack of conformity as long as the described characteristics and performance are maintained.
  • Traceability that also protects you: we document the condition, serial number, and seal of each piece of equipment upon shipment, and we video-record the opening of returns; this is your proof of the condition in which the goods were delivered.

Responsible use and your part

  • If you are thinking of returning it, keep it as you received it: without installing or activating it, with its seals, accessories, and packaging intact. This is how to ensure a full refund, without deductions.
  • Handling that exceeds inspection reduces value: handling the equipment beyond what is necessary to verify its nature and operation may result in a real, assessed, and case-by-case justified deduction (art. 108.2 TRLGDCU), never a fixed percentage. In particular: activating or registering the serial number, linking it to a manufacturer's account or app, circulating water through hydraulic equipment, unsealing probes, or installing software or consumables. Initial inspection of the product does not lead to a deduction.
  • The same item must be returned: withdrawal requires returning the supplied unit. Different equipment, or equipment with prior use, age, or wear prior to purchase, does not constitute a valid withdrawal.
  • Installation and cybersecurity, shared responsibility: this is technical hardware; you are responsible for correct installation, credentials, patches, and backups, while we deliver a compliant product. Q-TECH is not liable for damages resulting from poor installation, incorrect configuration, or omission of patches by the customer or third parties (in B2C, without prejudice to the legal warranty and liability for intent or negligence, arts. 86 and 130 TRLGDCU).
  • Delivery of bulky goods: delivery is made to the curb. B2C: transport risk is ours until physical delivery (art. 66 ter); we recommend noting visible damages on the delivery note and notifying us of breakages within 24-48 hours with photographs to activate the insurance. B2B: inspection and notation on the delivery note are mandatory; hidden damages must be reported within 24 hours (art. 366 CCom). Unjustified rejection or incorrect shipping information will entail the actual outbound and return costs (approx. €85-550 for heavy machinery).

Made to your measure (Advanced Pre-Assembly)

  • If your order includes equipment, racks, hydraulic assemblies, or technical rooms made or configured according to your specifications (permanent joints, custom cuts or wiring, parameterization, pressure testing), these are custom goods without the right of withdrawal from the conclusion of the contract (art. 103.c TRLGDCU; CJEU Case C-529/19), which is informed before purchasing and documented in the signed Order Note. A test you request without permanent modification retains your right of withdrawal, with only the actual loss of value caused by that test being deducted. Would you prefer to receive it tested, configured, and ready to connect, without assuming these risks? Contract our Advanced Pre-Assembly or the prior technical audit.

If you are purchasing as a business or professional (B2B)

  • The transaction is governed by the Commercial Code: firm sale, without the right of withdrawal; notification of defects within 4 days (apparent) / 30 days (hidden), arts. 336 and 342. Q-TECH acts as a distributor and excludes indirect damages, loss of profit, and data loss, limited to the price of the equipment, without prejudice to the manufacturer's commercial warranty.

Product warnings v1.0 · June 2026. Information summary; the complete and binding conditions are those published at q-tech.es.

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The Vitosolic 100, model SD1, is a differential temperature controller designed to optimize the efficiency of your heating and domestic hot water (DHW) production system. It offers intelligent, priority management of solar energy, ensuring maximum savings and performance in bivalent installations.

This system is specifically designed for installers and professionals who require precise and reliable control in complex configurations.

💰 Key Benefits: Maximize Savings and Efficiency

The Vitosolic 100 controller goes beyond a simple on/off switch. It is the centerpiece for superior energy management.

  • Intelligent Solar Priority: Automatically manages DHW demand by prioritizing energy captured by solar collectors before activating the auxiliary boiler (gas, oil, or solid fuel).

  • Universal Compatibility: A comprehensive bivalent solution compatible with solar collector systems, gas/oil boilers, and solid fuel boilers.

  • Guaranteed Savings: Optimizes consumption of the auxiliary source (boiler), significantly reducing operating costs for homes or businesses.

  • Simple and Reliable Installation: Clear wiring and configuration facilitate startup by professional installers.

⚙️ Technical Features of the Vitosolic 100 (SD1)

This electronic regulator operates based on the temperature difference between the solar collector and the DHW storage tank, ensuring efficient heat transfer only when optimal.

Advanced Configuration and Detection

The SD1 model is prepared to precisely monitor working conditions:

  • Differential Control: Activates the solar circuit pump when the collector temperature exceeds that of the storage tank by a preset differential.

  • System Protection: Includes safety functions such as frost protection and DHW storage tank maximum temperature limitation.

Included Measurement Components

The controller box includes the necessary sensors for immediate and precise installation:

  • NTC 20 kOhm Sensor: Generally used for temperature measurement in the solar collector.

  • NTC 10 kOhm Sensor: Usually intended for temperature measurement in the DHW storage tank.


📋 Technical Specifications

The following information is essential for the compatibility and installation of the Vitosolic 100, model SD1.

  • Model: SD1

  • Control Type: Electronic, via temperature difference

  • Main Application: Bivalent DHW production

  • Source Compatibility: Solar energy collectors, gas boilers, oil boilers, solid fuel boilers.

  • Included Sensors: 1 x NTC 20 kOhm sensor + 1 x NTC 10 kOhm sensor

  • Power Supply: [Add voltage and frequency, e.g., 230 V, 50 Hz (Assumed data, must be verified)]

  • Relay Outputs: [Add number of relays and capacity, e.g., 1 potential-free relay (Assumed data, must be verified)]

  • Protection Rating: [Add IP, e.g., IP20 (Assumed data, must be verified)]


❓ Frequently Asked Questions

What exactly does "bivalent DHW production" mean in this context?

Bivalent DHW production involves the use of two energy sources to heat water: a primary, priority source (in this case, solar) and an auxiliary source (gas, oil, or solid fuel boiler). The Vitosolic 100 intelligently manages when and how much the auxiliary source needs to intervene.

Is the Vitosolic 100 SD1 compatible with any brand of boiler?

Yes. By functioning as a differential temperature controller that operates a valve or pump, it is compatible with any boiler system that accepts a simple control signal (such as burner start/stop or auxiliary pump control). It is a universal control system for solar thermal energy management.

How are solar collectors protected from overheating in summer?

The Vitosolic 100 controller incorporates thermal protection functions that limit the maximum temperature of the DHW storage tank to prevent overheating. Once the limit is reached, the regulator stops the solar pump to prevent system damage or excessive steam formation.


📞 Technical Support and Professional Assistance

For installers and companies: If you have questions about the configuration or need specialized technical assistance during installation, our team of experts is available by phone or through our on-site service. Contact us to ensure a perfect startup of your Vitosolic 100.

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