09 Jun 2026
EV (Electric Vehicle) is increasingly being used in Indonesia. Along with that, the use of EV chargers at home is also increasing. But in some cases, charging can have problems: slow, frequently tripping, or even unstable.
This problem is often considered to come from the charger itself. However, one of the most important factors actually lies in the home electrical system—especially in electric cables and home wiring installations.
1. Home cable capacity is not suitable for EV charger load
EV chargers require quite large power compared to ordinary household appliances.
If the household cables used are not suitable for the current capacity, overheating will occur. The impacts:
- charging becomes unstable
- MCB frequently trips
- increased risk of installation damage
Here it is important to use power cables and electric power cables that meet standards for high loads.
2. The quality of cables used is not standard
Not all Indonesian electrical cables have the same quality.
Poor quality cables usually have:
- non-pure conductors
- cable insulation easily overheats or becomes brittle
- unstable electrical conductivity
Whereas for EV chargers, high-quality cables are needed with high standards to ensure electricity flow remains safe and stable.
Trusted Indonesian cable manufacturers usually have tested cables for heavy usage such as industrial cables and infrastructure cables.
3. Home cable installation is not designed for EV loads
Many older homes were not designed for modern electrical needs.
EV chargers are high loads, so the installation must use:
- low voltage cables to large power cables according to the route
- proper electrical distribution system
- dedicated line
If the installation is still mixed with other equipment, the risk of disturbance will be higher.
4. Cable length and connection quality
The longer the electrical path, the greater the potential voltage drop.
If the connection is not neat or the quality of home electrical cables is poor, then:
- power to the EV charger can become unstable
- charging process becomes longer
- cables can heat up more quickly
This often happens in household installations that are not designed for EV.
5. Electrical protection system is not appropriate yet
EV chargers should be equipped with proper protection, such as:
- MCB according to capacity
- good grounding
- leakage current protection system
Without this, the electrical cable system and charger may not work optimally.
6. Cables are not suitable for hot or outdoor environments
Some EV chargers are installed in garages or outdoor areas.
If the home cables used are not heat-resistant or weather-resistant, then:
- cable insulation can be damaged quickly
- performance decreases
- risk of disturbance increases
For this condition, environmentally friendly cables and high-temperature resistant cables are needed.
Conclusion
Problems with EV chargers at home are often not only from the device itself, but from the cable system and electrical installation.
The use of electric cables, power cables, household cables, and high-quality power cables is the key to ensuring EV charging is:
- stable
- safe
- efficient
- long-lasting
As part of energy technology development, the need for infrastructure cables, building cables, construction cables, and industrial cables will become increasingly important, including to support the electric vehicle ecosystem in Indonesia.
PT Jembo Cable Company Tbk as one of the Indonesian cable manufacturers is committed to providing high-quality electrical cables to support home electrical systems, industry, and the future of electric vehicles that are safer and more reliable.
