Two very different jobs live under the same power meters energy management roof: tracking a battery bank and tracking a live three-phase circuit. The Aquion Energy BMS-200 is built for the first, the Tuya WiFi Three Phase Power Meter for the second, and the price gap between them is more than $1,300. If you buy the wrong type, you end up with a meter that measures the wrong part of your system.
Quick verdict
Choose the Tuya WiFi Three Phase Power Meter if your project is a three-phase circuit and you want live monitoring without a four-figure outlay. Choose the Aquion Energy BMS-200 if your priority is a dedicated battery-bank monitor and the price fits the overall project budget.
At a glance
| Product | Price | Role | Key details | Price position |
|---|---|---|---|---|
| Aquion Energy BMS-200 / 0140D11AU143 | USD 1,499.00 | 24 Vdc battery monitoring system | New - Open box, United States | |
| Tuya WiFi Three Phase Power Meter | USD 197.95 | Three-phase bi-directional WiFi power meter | Tuya app sharing, CE/FCC, ±1% accuracy, three CT clamps |
Where each product wins
Aquion Energy BMS-200 is the clear winner for battery-bank installations that need a monitor dedicated to that role.
Tuya WiFi Three Phase Power Meter is the clear winner for three-phase circuits where remote access and a lower price point are priorities.
Product notes
Aquion Energy BMS-200 / 0140D11AU143
This is the purpose-built option for a dedicated battery bank, and that narrow focus is its best reason to exist. It is in New - Open box condition and marked as originating in the United States, which may matter to buyers who prefer a stateside-origin unit. The $1,499 price is the obvious limitation: it is the most expensive item in this comparison by a wide margin. If your installation is strictly about battery monitoring rather than branch circuits, this keeps the system dedicated to that task. The price is justifiable when the monitor is a core part of a larger storage project, not an impulse add-on.
Tuya WiFi Three Phase Power Meter
The Tuya meter packs a broad feature set into the lower-priced side of this comparison. It tracks kWh, watches for over/under voltage, over/under current, leakage, temperature, and phase imbalance, and its bi-directional measurement makes it useful for load and source direction. The three CT clamps are included, so the main current-sensing hardware comes with the unit. You get Tuya Smart Life app compatibility with device sharing and voice command support, plus CE/FCC markings and ±1% accuracy. The limitation is scope: this is an AC three-phase power meter, not a battery monitor, so it will not replace the Aquion in a battery-bank role. For a live three-phase feeder, load, or source, this is the unit to start with.
Final choice by use case
- Live three-phase load or source monitoring: Tuya WiFi Three Phase Power Meter.
- Dedicated battery bank monitoring: Aquion Energy BMS-200.
- Remote access plus a lower spend: Tuya WiFi Three Phase Power Meter.
If your setup combines both, the Tuya meter handles circuit monitoring while the Aquion stays on battery duty.
