What is the TommaTech Parallel Card?
TommaTech Parallel Card is a circuit card used to run TommaTech Off-Grid PLUS Series inverters in parallel. 1 piece(s) are needed per inverter.
As an example, the manufacturer states that two 5 kW Plus series inverters connected in parallel can deliver 10 kW. In this way, when needs grow, a second inverter can be added to increase system power. The product information gives no dimensional or electrical values.
What projects is it suitable for?
A parallel card is needed in these installations:
- Off-grid vineyard-house and farm systems where a single inverter's power is not enough
- Off-grid installations planned to grow over time
- Systems in which two inverters run together for redundancy
Points to watch during installation
A separate card is needed for every inverter that will run in parallel; when the cards are fitted into the inverters' parallel connection input, it is important for safety that the inverters are de-energized. In a parallel system, cable cross-sections and protection devices must be calculated according to the total power, and settings must be made identically on all inverters. These tasks must be carried out by authorized technical personnel. After a parallel installation, load sharing should be tested and it should be verified that all inverters operate in balance. If an inverter will be added later, the planning should include from the start that the new inverter must be from the same series and will need an additional parallel card.
Use in Antalya and Solar Nexo support
In Antalya, air-conditioning and water pump loads quickly raise consumption in vineyard houses and farms in summer; in this case, parallel operation makes it possible to increase capacity with an additional inverter. It must be taken into account in planning that one card is needed per inverter and that using inverters of the same model is appropriate.
Solar Nexo handles the cabling and settings of the parallel connection during installation and determines the number of inverters from the load calculation. You can request the datasheet for the product.
