For anyone shopping power meters for energy management, the decision usually comes down to what happens after the meter reads the current. A three-phase system can deliver a lot of data, and the meter you choose determines how much of that data you can actually use. Do you need a specialized monitoring module you can trust in an industrial panel, or do you need a lower-priced, app-connected three-phase meter that keeps you informed from anywhere? The Schneider Electric PM8240 PowerLogic and the Tuya WiFi Three Phase Power Meter answer that question in very different ways, and the gap in listed prices makes the choice even more deliberate.
Quick verdict
The Schneider Electric PM8240 PowerLogic is the higher-priced, more specialized option. It aims at installations where the meter has to do more than track monthly energy use. For close-in electrical monitoring in a fixed panel, that depth is the reason to consider it.
The Tuya WiFi Three Phase Power Meter is the connected, lower-priced option. If you want to keep an eye on a three-phase circuit from your phone, this is the meter to look at.
Price and positioning at a glance
| Product | Listed price | Condition | Notable features |
|---|---|---|---|
| Schneider Electric PM8240 PowerLogic (METSEPM8240) | USD 412.50 | Used | Power Meter / Power Monitoring Module; PowerLogic PM8000 family |
| Tuya WiFi Three Phase Power Meter | USD 197.95 | New | Three CT clamps; Tuya app; bi-directional measurement; ±1% accuracy |
Where each product wins
The Schneider Electric PM8240 wins on monitoring depth
The Schneider meter is not designed to be a casual energy logger. It is the more expensive option, and the extra cost goes toward a platform that can sit in a permanent panel and keep working through the details of an electrical installation. If your panel needs a permanent monitoring module, the Schneider meter is the stronger choice.
The Tuya WiFi Three Phase Power Meter wins on connectivity and list price
The Tuya meter is the lower-priced path into three-phase monitoring. Its strength is how much control it puts in your hands from a phone: remote visibility, adjustable thresholds for voltage, current, leakage, temperature, and phase imbalance, plus the convenience of app-based operation. If app access and a lower entry price matter more than a dedicated monitoring module, this meter makes the stronger case.
Product notes
Schneider Electric PM8240 PowerLogic
The Schneider Electric PM8240 PowerLogic is a used Power Quality Meter from the PowerLogic PM8000 family. Its type is Power Meter / Power Monitoring Module, so the unit is meant for sustained electrical monitoring rather than casual energy tracking. It is the higher-priced of the pair, with a $214.55 gap separating it from the Tuya meter. If you need a panel-mounted monitoring module with the PowerLogic PM8000 identity, this is the one to plan around. The catch is the condition and the price: it is a used unit, and you are paying more and accepting pre-owned condition to get a specialized instrument.
Tuya WiFi Three Phase Power Meter
The Tuya WiFi Three Phase Power Meter is a new three-phase meter and the lower-priced option. It comes with three CT clamps, and bi-directional measurement means it can register power flowing in either direction. The ±1% accuracy class gives you a reasonable starting point for load tracking. Through the Tuya Smart Life app, you get remote monitoring, control, device sharing, and voice command support. The main argument for it is the bundle: included clamps, app control, and the lower list price all in one new unit. The trade-off is that the meter cannot act on its protection monitoring by itself-you need a circuit breaker and shunt trip device for the protection functions to operate.
Final choice by use case
- For an industrial or commercial panel where the meter needs to do more than track usage, the Schneider Electric PM8240 PowerLogic is the one to plan around. The higher price is the trade-off for a more specialized instrument.
- For remote visibility on a three-phase circuit at a lower entry price, the Tuya WiFi Three Phase Power Meter is the better fit. Its connected design fits energy management setups where you want to check in from your phone.
