Systems

Energymanagement with SOLPLUS inverters

Solutronic AG has upgraded the firmware of its SOLPLUS inverters and its graphical evaluation program, SOLPLUS+, to such a degree that the inverters are now capable of supporting their own intelligent energy management solutions. Additional external equipment for metering, evaluating and controlling the consumption of on-premises-generated electricity is therefore not needed.

In practice, in-house consumption is controlled directly with SOLPLUS 25 – 55 inverters and by means of a SOLCOMBOX in installations equipped with SOLPLUS 15, 100 and/or 120 inverters: the inverters are connected to the electrical consumers by means of relays and digital outputs.

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SOL-Energymanager

This plant enables family homes and small businesses to generate, consume and store their own electricity at a reasonable price – and it greatly simplifies decentralised power generation and utilisation. A key component of what is an outstanding unit as regards size, economic viability and longevity, is the new SOLPLUS 40S2 solar inverter.

Compared with the way solar power is most widely utilised at present, namely it's fed directly into the grid, the main benefit of energy storage for the system operator is 24-hour availability of electricity generated on the premises in a fully building-integrated system, without having to make any technical modifications to electrical consumers. It allows end users to benefit from their own electricity generation and profit from public subsidies at one and the same time.

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DE-ICING BOX

To be able to gain maximum benefit from the solar system even during snowy winter periods, Solutronic has developed a DE-ICING BOX specifically for use with its SOLPLUS inverters. The DE-ICING BOX enables snow that falls on the PV generator to be thawed and then slide off by actively switching the inverter to feedback mode in order to heat the generator: the temperature of the modules can be increased by up to 10°C.

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FEED-IN Solution (FIS)

FIS controls the inverters' power output depending on the level of local (in-house) consumption and the grid load. It is installed in-between the SOLPLUS inverter(s) and the grid connection and regulates the amount of energy that is fed into the grid in line with the specifications.

FIS is capable of feeding in a predefined maximum quantity of electricity while taking into
account appliances in use in the building. This means, for instance, if 70% of the maximum DC output of the PV system is allowed to be fed into the grid and a refrigerator, lights and the cooker in the house are all on, the amount of electricity required by these appliances is drawn from the electricity generated –the rest is fed into the grid. If no appliances are running, the 70% maximum permitted is fed in.

Applications of the FIS can be:
• Power utility companies demand temporary reductions in power infeed from PV installations
• Connected load limited by default
• No grid infeed permitted/desired
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