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Insideevs
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Fast Chargers Are Stupid Expensive. Here's Why.
- DC Fast Chargers can cost over $100,000 to build, with 60% of the cost dedicated to safety measures to prevent electrocution.
- The safety system, called an isolation link, costs an estimated $54,000 and is crucial for galvanic isolation in EV chargers.
- Proposals to reduce costs include shifting safety responsibility to onboard vehicle chargers, but face challenges like standardization and increased car costs.
- Experts suggest eliminating isolation links in chargers in favor of redundant grounds to lower costs and improve reliability.
- A proposed solution includes using a buck regulator to manage voltage mismatches, which could reduce costs significantly compared to isolation links.
- While removing galvanic isolation could cut costs and improve charger reliability, industry hesitancy and safety concerns may delay implementation.
- The industry is cautious about adopting non-isolated systems until proven to be as safe as current chargers, potentially lengthening the timeline for changes.
- For now, expect high costs for EV chargers due to prioritizing safety measures to prevent accidents during charging.
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