Best Smart Plugs with Energy Monitoring in 2025
Updated September 1, 2025
Marcus has audited over 400 US homes for energy efficiency and specializes in smart home power monitoring systems. He holds a BPI Building Analyst certification.
Last updated: 2025-09-01
Smart plugs with energy monitoring give you the power to see exactly what each device in your home costs to run. According to the U.S. Department of Energy, standby power — often called phantom load or vampire energy — accounts for 5–10% of residential electricity use. A single smart plug can reveal that your gaming console costs $150/year in standby alone. In this review, we tested five leading models across accuracy, app quality, smart home compatibility, and value.
How It Works
Smart plugs with energy monitoring use embedded current transformers (CTs) or shunt resistors to measure amperage passing through the socket. This data is combined with measured voltage to calculate wattage in real time. The plug transmits this data via Wi-Fi to a cloud server where the app aggregates usage into daily, weekly, and monthly reports. Cost estimates are derived by multiplying kWh consumed by your configured utility rate.
“Most homeowners have no idea how much their entertainment center costs in standby. I've walked into audits where the TV, soundbar, and gaming consoles together draw 45 watts 24/7. That's nearly $50 a year — just to glow a red LED. A $15 smart plug pays for itself in two months.”
Quick Comparison
Key specs side-by-side — jump to any product for full details.
| Model | Accuracy | Max Load | Platforms |
|---|---|---|---|
| Kasa EP25 | ±1% | 1800W | Alexa, Google, SmartThings |
| Emporia Smart Plug | ±2% | 1800W | Alexa, Google |
| Wemo Insight | ±5% | 1800W | Alexa, Google, HomeKit |
| Tapo P110 | ±2% | 1800W | Alexa, Google |
| Meross MSS310 | ±3% | 1800W | All 4 major platforms |
Full Reviews
Amazon Basics Smart Plug 4-Pack, Wi-Fi, Alexa
The Amazon Basics Smart Plug 4-Pack delivers reliable Alexa voice control and scheduling at one of the lowest per-unit prices on the market. Easy 2-step setup through the Alexa app makes it ideal for households already in the Amazon ecosystem looking to automate multiple devices at once.
Pros
- Works directly with Alexa — no extra app needed
- 4-pack delivers the best per-unit price
- Compact single-outlet design
- Simple 2-step setup via Alexa app
Cons
- Amazon/Alexa ecosystem only — no Google or HomeKit
- No energy monitoring or power readings
- Requires 2.4 GHz Wi-Fi
Key Specs
NEWVANGA Universal Travel Adapter, GaN PD3.0 USB-C
The NEWVANGA Travel Adapter supports outlets in 150+ countries and includes GaN PD 3.0 USB-C for fast charging. With dual USB-A ports alongside the USB-C, it handles multiple devices simultaneously — essential for anyone working or traveling internationally.
Pros
- Works in 150+ countries worldwide
- GaN PD 3.0 USB-C for fast charging
- Dual USB-A ports for legacy devices
- Compact and lightweight design
Cons
- Not a smart plug — no app or scheduling
- No energy monitoring features
- USB-C max 30W (not ideal for laptops over 45W)
Key Specs
GHome Smart Plug, Wi-Fi, Works with Alexa & Google
The GHome Smart Plug offers reliable Wi-Fi control at a budget-friendly price point, with native support for both Alexa and Google Assistant. Its straightforward app lets you set schedules and countdown timers without any subscription or hub requirement.
Pros
- Works with both Alexa and Google Assistant
- No hub required — direct Wi-Fi connection
- Schedule and countdown timer support
- Budget-friendly per-unit cost
Cons
- No energy monitoring
- App is basic compared to Kasa or Govee
- No SmartThings or HomeKit support
Key Specs
Govee Smart Plug 4-Pack, Wi-Fi, Alexa & Google
Govee's Smart Plug 4-Pack combines affordable per-unit pricing with a polished app featuring timers, schedules, and scene grouping. Works seamlessly with Alexa and Google Home, making it an excellent choice for building a multi-room smart home setup without breaking the budget.
Pros
- Polished Govee app with scenes and groups
- 4-pack for whole-home coverage
- Alexa and Google Home integration
- Reliable Wi-Fi connection
Cons
- No energy monitoring
- Requires 2.4 GHz Wi-Fi only
- No HomeKit support
Key Specs
Kasa Smart Plug Ultra Mini 15A, 2-Pack (EP10P2)
Kasa's Ultra Mini Smart Plug is one of the smallest 15A plugs available, fitting behind furniture and in tight spots without blocking adjacent outlets. The Kasa app is among the best in class for scheduling and automation, and ETL Certification ensures safety compliance.
Pros
- Ultra-compact — doesn't block second outlet
- Excellent Kasa app with robust scheduling
- ETL Certified for safety
- Works with Alexa and Google Home
Cons
- No energy monitoring on EP10 model
- 2.4 GHz Wi-Fi only
- No HomeKit support
Key Specs
How to Choose
When choosing a smart plug with energy monitoring, prioritize accuracy first — look for ±2% or better. Check smart home compatibility with your existing ecosystem (Alexa, Google Home, or HomeKit). If you want to do deep analysis, pick a model with CSV export. For most homeowners, the Kasa EP25 or Tapo P110 offers the best accuracy-to-price ratio. If you're in an Apple HomeKit home, the Wemo Insight or Meross MSS310 are your best bets.
Our Final Recommendation
For most households, the Kasa EP25 is the clear winner: best-in-class ±1% accuracy, broad platform support, and a sub-$20 price. Budget shoppers should grab the Tapo P110. Apple HomeKit users should consider the Meross MSS310 for its universal compatibility, or the Wemo Insight for its track record. Data enthusiasts will love the Emporia Smart Plug's CSV export and dashboard depth.