⚠️ EMERGENCY: Device Getting Hot
If your Zap is getting hot to the touch:
DISCONNECT IMMEDIATELY - Both from meter and USB power
DO NOT TOUCH if too hot - wait for cooling
CHECK FOR:
Burning smell
Discoloration of plastic
Device too hot to hold for more than 5 seconds
If any of these signs are present, your device may be damaged. Do not reconnect.
Common Cause: Wrong Port Connection
You May Have Connected to a HAN Port (RJ45)
This is the #1 cause of overheating. HAN ports output 24-36V while Zap expects 5V from P1 ports.
How to tell if you connected to HAN instead of P1:
Cable fit loosely in the port
Port was ethernet-sized (RJ45) not telephone-sized (RJ12)
Port labeled "HAN" not "P1"
Device got hot within minutes of connection
What Happens When Connected to HAN Port
Immediate: Device receives 24-36V instead of expected 5V
Within minutes: Internal components overheat
Result: Permanent damage to voltage regulator and ESP32
Checking If Your Device Is Damaged
Safe Testing Procedure
Let device cool completely (at least 30 minutes)
Connect ONLY USB-C power (do not connect to meter)
Check if device powers on
Blue LED should light up
Device should broadcast WiFi network for setup
Monitor temperature
Should stay cool to touch
If heating up again, disconnect immediately
Signs of Permanent Damage
Continues to overheat with just USB power
Burning smell persists
No LED activity
Cannot find WiFi network "ZAP-XXXXXX"
If You Need External Power (USB-C)
Some situations require external power even with correct P1 connection:
When External Power Is Needed
Your P1 port doesn't provide power (common in Norway)
Meter located far from WiFi (power helps maintain connection)
Daisy-chaining multiple P1 devices
Safe External Power Setup
Use standard USB-C cable
Any phone charger works (5V, 1A minimum)
Power banks are acceptable for testing
For permanent installation in shared spaces:
Check with building management
Use certified power adapters only
Ensure proper ventilation
Power Consumption
Normal operation: ~1-2W
Device should remain cool to touch
If using power bank: 10,000mAh lasts ~1 week
Before Reconnecting After Issues
Verification Checklist
Confirm you have P1/RJ12 port (not HAN/RJ45)
6 pins, not 8
Telephone-jack size, not ethernet size
Test device with USB power only first
Ensure P1 port is activated by utility
Use only the included RJ12 cable
Do NOT:
Use any adapters (RJ45-to-RJ12)
Force connections
Connect if device previously overheated
Ignore warning signs (heat, smell, loose fit)
Getting Help
For Damaged Devices
If your Zap was damaged by incorrect connection:
Document the issue (photos of port, device condition)
Note exactly what happened
Contact [email protected]
Request return/replacement
We understand these connection differences can be confusing and will work with you on a solution.
For Power Setup Questions
If you need help with external power setup:
Describe your meter location
Available power sources nearby
Building restrictions
We can suggest appropriate solutions
Prevention Tips
Always verify port type before connecting
Read compatibility guide first
When in doubt, send photos to support
Never force connections
Test with USB power first if unsure
Remember: A few minutes of verification can save your device. The difference between P1 and HAN ports is not just about data compatibility - it's about protecting your device from damage.