There are installations that work.
And there are installations that are well configured.

It's not the same thing.

When installing a system with a Deye hybrid inverter and Pylontech batteries, it is relatively easy to get everything up and running on the first try: the inverter turns on, the battery appears on the screen, and the system begins charging and discharging.

However, just because the system works does not mean that it is configured correctly.

In many installations, problems appear weeks or months later: intermittent warnings, unstable SOC, batteries that degrade earlier than expected, or strange behavior in the backup.

Most of these cases are not related to equipment failure, but rather to parameters or configurations that were not checked during commissioning.

These are three points that often go unnoticed.

1. An unstable SOC usually indicates communication problems.

The SOC (State of Charge) is one of the most important indicators in the system.

When communication between the inverter and the battery's BMS is correctly configured, the SOC should be stable and consistent.

However, in many facilities, symptoms such as the following appear:

Sudden jumps in SOC (e.g., from 60% to 80%)
Sudden changes during loading or unloading
Inconsistent values regarding actual energy consumption

In most cases, the cause is an incorrect configuration of the communication protocol, usually CAN or RS485.

If the BMS communication is not configured correctly, the inverter does not receive the battery data correctly and works with its own estimates, which ends up generating erratic behavior.

That is why it is essential to review:

Selected protocol type
Correct wiring
Communication port address or configuration
Firmware compatibility

2. The maximum battery current is not determined by the installer.

It is common to find installations where the charging or discharging current has been manually set to values that do not correspond to the actual capacity of the system.

However, in systems with Pylontech batteries, the maximum current should be defined by the BMS.

The BMS calculates this value taking into account:

Number of connected modules
Cell temperature
Internal battery status
Safety limits defined by the manufacturer

Forcing higher currents may appear to improve system performance, but it actually accelerates cell aging and reduces battery life.

Proper configuration allows the BMS to dynamically control these limits.

3. A poorly configured backup can drain the battery.

Another point that is often overlooked is the configuration of the battery backup.

If a minimum SOC reserve is not established, the system may operate daily at very deep discharges, especially in installations with high self-consumption or scheduled discharge times.

This causes the battery to:

reach very low load levels on a recurring basis
work under less efficient conditions
accumulate more deep cycles than expected

In the long term, this translates into greater wear and tear and a shorter service life for the storage system.

Correct configuration of the minimum SOC allows for a balance between self-consumption and battery protection.

A system may not give alarms... and still not be optimized.

An installation can function seemingly well for months without displaying any errors on screen.

But that does not mean that the system is working under optimal conditions.

In hybrid systems with storage, the initial configuration makes the difference between an installation that simply works and one that is truly optimized.

Technical support during commissioning

At DSP Solar, we work daily with installers who integrate storage systems into their projects.

That is why, in addition to supplying equipment, we offer technical support in configuring and reviewing parameters, helping to verify that the installation is correctly adjusted from the outset.

Small details during implementation can prevent many problems later on.