Siemens VersiCharge AC vs. Tesla Universal Wall Connector: Level 2 EV Charger Spec Comparison
Side-by-side specification comparison of Siemens VersiCharge AC (48A max) and Tesla Universal Wall Connector (48A max) across 32A, 40A, and 48A residential Level 2 branch circuits.
By Gil Sapir, Editor
Fast Answer⚡ Spec Summary: Siemens VersiCharge AC vs Tesla Universal Wall Connector▼
Tesla Universal Wall Connector (Approx. $595 Reference Price)
60A Double-Pole Breaker (for 48A Max Output) • 6 AWG THHN Copper in Conduit
Compatible EV Chargers for 48A Continuous Load
Tesla Universal Wall Connector
48A Max Output • Hardwired Capable
Emporia EV Charger
48A Max Output • Hardwired Capable
ChargePoint Home Flex
50A Max Output • Hardwired Capable
Comparing Siemens vs Tesla on a 48A Load
Comparing published manufacturer specifications, Tesla Universal Wall Connector has the lower approximate reference price by ~$34. Compare maximum continuous amperage (48A vs 48A) and connector compatibility below.
Siemens VersiCharge AC
Consider this if: You need up to 48A continuous output and matching connector support.
- ✓ Approx. Ref. Price: $629 (Check Retailer)
- ✓ Max Output: 48 Amps
Tesla Universal Wall Connector
Lower Ref. PriceConsider this if: You want up to 48A continuous output and its specific enclosure/cord configuration.
- ✓ Approx. Ref. Price: $595 (Check Retailer)
- ✓ Max Output: 48 Amps
Siemens VersiCharge AC vs. Tesla Universal Wall Connector
| Feature / Spec | Siemens VersiCharge AC | Tesla Universal Wall Connector |
|---|---|---|
| Approx. Reference Price (Check Retailer) | ~$629 | ~$595💰 Lower Reference Price |
| Max Amperage Rating | 48 Amps (11.5 kW) | 48 Amps (11.5 kW) |
| Hardwire Support | ✅ Yes (Hardwire Capable) | ✅ Yes (Hardwire Capable) |
| Supported Plug Standard | J1772 | J1772NACS |
| Enclosure & Outdoor Rating | NEMA 4 / 3R (Indoor / Outdoor Weatherproof) | NEMA 4 / 3R (Indoor / Outdoor Weatherproof) |
32A, 40A & 48A Branch-Circuit Configuration Matrix (NEC 625.41)
Comparison of breaker ratings, 75°C copper wire gauges, and charger output across standard residential Level 2 circuit tiers.
| Continuous Load | NEC 125% Breaker | Power @ 240V | Copper Wire Gauge | Installation Method | Siemens VersiCharge AC | Tesla Universal Wall Connector |
|---|---|---|---|---|---|---|
| 32A Continuous | 40A 2-Pole | 7.7 kW | 8 AWG Cu (75°C THHN) | Hardwired or NEMA 14-50 | Operates at 32A (7.7 kW) | Operates at 32A (7.7 kW) |
| 40A Continuous | 50A 2-Pole | 9.6 kW | 8 AWG THHN / 6 AWG NM-B | Hardwired or EV-Rated NEMA 14-50 | Operates at 40A (9.6 kW) | Operates at 40A (9.6 kW) |
| 48A Continuous | 60A 2-Pole | 11.5 kW | 6 AWG Cu (75°C THHN in Conduit) | Hardwired Only (NEC 625) | Full 48A (11.5 kW+) | Full 48A (11.5 kW+) |
Tesla Model Y Charge & Infrastructure Sizer
Battery: 81 kWh | Max AC Input: 11.5 kW | Efficiency: 3.6 mi/kWh
Energy & Economic Impact
11.11 kWh
4056 kWh/yr
$649
Time to Replenish 40 Miles
NEC Code Specs (125% Rule)
Electrical SafetyHardware Specification Summaries
Siemens VersiCharge AC
Based on manufacturer specifications, the Siemens VersiCharge AC is rated for up to 48A continuous duty (11.5 kW at 240V) with J1772 connector support. Below is a summary of published specifications and installation considerations.
Key Capabilities
- •Supports up to 48A continuous output
- •Indoor/outdoor rated weatherproof enclosure
- •UL 2594 safety standard compliant
Installation Notes
- •Requires 60A hardwired branch circuit for maximum output
- •Verify local permit and GFCI breaker requirements with a licensed electrician
Manufacturer Specifications
Tesla Universal Wall Connector
Based on manufacturer specifications, the Tesla Universal Wall Connector is rated for up to 48A continuous duty (11.5 kW at 240V) with J1772, NACS connector support. Below is a summary of published specifications and installation considerations.
Key Capabilities
- •Supports up to 48A continuous output
- •Indoor/outdoor rated weatherproof enclosure
- •UL 2594 safety standard compliant
Installation Notes
- •Requires 60A hardwired branch circuit for maximum output
- •Verify local permit and GFCI breaker requirements with a licensed electrician
Manufacturer Specifications
Required Wiring & Installation Accessories
60A Double-Pole Circuit Breaker
UL-Listed, mandatory for continuous EV charging load under NEC code.
4/6 AWG THHN Copper Wire (50ft Spool)
Heat-resistant 90°C copper conductor for conduit installation.
Hubbell HBL9450A / Bryant Electric 50A Industrial NEMA 14-50 Outlet
Industrial Grade heavy-duty receptacle (Hubbell HBL9450A / Bryant 50A). Mandatory safety upgrade to prevent melting on high continuous EV loads.
3/4" Schedule 40 PVC Conduit (10ft Lengths)
UV-resistant protection for exposed indoor/outdoor wire runs.
Frequently Asked Questions: Siemens VersiCharge AC vs Tesla Universal Wall Connector
What is the main specification difference between Siemens VersiCharge AC and Tesla Universal Wall Connector?
Siemens VersiCharge AC is rated for up to 48A continuous output (11.5 kW at 240V) with J1772 support (approx. $629), while Tesla Universal Wall Connector is rated for up to 48A continuous output (11.5 kW at 240V) with J1772/NACS support (approx. $595).
What breaker and wire size do Siemens VersiCharge AC and Tesla Universal Wall Connector require under NEC 625.41?
Under NEC Article 625.41, EV chargers are continuous loads sized at 125%: a 32A setting requires a 40A breaker (#8 AWG THHN), a 40A setting requires a 50A breaker (#8 AWG THHN or #6 AWG NM-B), and a 48A setting requires a 60A hardwired circuit (#6 AWG THHN copper in conduit).
Can both Siemens VersiCharge AC and Tesla Universal Wall Connector be installed on a 40A or 50A circuit?
Most adjustable Level 2 EVSE units can be derated via internal rotary switches or installer software during commissioning to match 40A (32A continuous) or 50A (40A continuous) branch circuits per NEC 625.42. Verify exact dip-switch or app configuration steps in the manufacturer installation manual.