In prosumer systems, consistency between the energy measurement performed by the user and the values ​​recorded by the distribution system operator's meter is crucial. How can this be verified using LAVVA Power?

Main feature of the device is its very high accuracy, which allows for applications requiring close correlation with official energy measurements and has a great practical importance. LAVVA Power operates within an accuracy class that allows for a total error of less than 1%. In practice, this means that the total energy determined from active power is within a single watt-hour of the meter's reading under the same measurement conditions.

PV systems generate rapidly varying power flows, in particular:

• dynamiczne przejścia między importem a eksportem energii,
• wahania generacji zależne od nasłonecznienia,
• chwilowe asymetrie między fazami.

What is necessary for correct measurements?

For the user's measurement to be comparable with a bi-directional meter, the following are neccessary:

• sufficiently high sampling rates,
• precise reconstruction of current and voltage fluctuation,
• synchronous multiphase sampling,
• stable representation of instantaneous power.

Lavva Power meets these requirements, allowing for data that practically matches the values ​​recorded by the operator's meter.

In energy measurements, the time interval from which energy is calculated is always crucial. Meters typically balance energy in:

• 1-second or sub-second windows (depending on the meter model),
• with energy integration performed at a high sampling rate.

LAVVA Power uses:

• short, stable and deterministic integration windows,
• synchronous measurement of all phases,
• signal filtering to minimize transient errors.

This ensures that the total balanced energy reflects the billing profile with high consistency with the data.

What can we analyze using LAVVA Power?

Thanks to accurate power and energy measurements, LAVVA Power enables detailed analysis of:

• instantaneous imported and exported power,
• energy consumed (import) and given to the grid (export),
• self-consumption and self-sufficiency level,
• phase asymmetries and local load peaks,
• inverter operation dynamics in the PV system.

High-quality input data enables the use of advanced analytical and forecasting algorithms without the need to compensate for measurement discrepancies.

LAVVA Power, with its <1% measurement accuracy, synchronized sampling and precise energy integration over time, provides measurements practically equivalent to those obtained by the operator's meter. This makes it suitable for both monitoring applications and detailed energy analyses in homes with photovoltaic installations.

See how LAVVA Power monitors energy in Your home!

LAVVA Team