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Product Description

Product Description

Smart Power Controller for Boilers & Heaters – Maximize Solar Energy Use, Reduce Grid Electricity Costs

The WPC3700 is a single phase, smart power controller designed to optimize the power usage of resistive loads like boilers and heaters. It allows you to adjust the power output via an app or API interface, ensuring that these devices use solar energy as much as possible rather than drawing from the grid. By integrating with IAMMETER energy meters, the WPC3700 can help you maximize the use of your solar system, reducing electricity costs, particularly in regions with significant differences between electricity rates and feed-in tariffs.

Key Features:

  • Maximize Solar Energy Use: The WPC3700 ensures your boilers and heaters use as much solar energy as possible, reducing reliance on grid power and saving on electricity costs.
  • Cost Savings: By utilizing solar surplus, the WPC3700 helps lower electricity bills, especially in areas with high electricity and feed-in tariff differences.
  • Flexible Control: Control the power output of your resistive loads directly through a mobile app or API, allowing for precise energy management.
  • Seamless Integration with IAMMETER Energy Meters: When used with IAMMETER energy meters, the WPC3700 can automatically adjust the power output based on available solar energy, ensuring efficient use of your solar system.
  • Custom Integration: For advanced users, the WPC3700 can be integrated with Home Assistant, Node-RED, or your own system through API access, giving you complete control over your power usage.

Who Can Benefit from this Device

Have a solar PV system and water heaters

Ideal for controlling the power output to your water heaters and maximizes the use of solar energy.

Feed-in tariff is significantly lower than the electricity price

With a low feed-in tariff, using solar energy directly can significantly reduce electricity bills.

The system has a relatively low self-consumption rate

Redirect surplus solar energy to your water heater for maximum efficiency.

This is a single-phase device, and it can only control single-phase water heaters.

  • The maximum power rating of your water heater should not exceed 3.7KW.

How it works - Flexible Operation Modes

Auto Mode with IAMMETER Meters - Recommended

When paired with IAMMETER energy meters, the WPC3700 operates in auto mode, adjusting the power of your boilers or heaters based on the solar energy available, which maximizes your solar energy usage and minimizes grid dependency.

Users can set a grid power threshold, allowing the WPC3700 to control the resistive load only when the grid power consumption is below the threshold (WPC3700 adjusts the resistive load power in real-time based on the feed-in power). For example, if the grid threshold is set to 0, the boiler heater will operate entirely on solar surplus power. This reduces grid power consumption while increasing the self-consumption rate of the solar system.

Standalone Operation

No IAMMETER meter? You can integrate the WPC3700 into your Home Assistant or Node-RED setup, using MQTT and the latest IAMMETER firmware for advanced automation.

For full flexibility, the WPC3700 supports integration into custom energy management systems via its API, allowing you to design the exact setup you need.

Real Customer Case and Energy Cost Savings

Before installing WPC3700

After installing WPC3700

As seen in the above two images, WPC3700 adjusts the resistive load power (boiler heater) in real-time based on grid power.

The customer has set the system to heat the water heater entirely using solar surplus, which means that from now on, the electricity costs for heating the water are completely saved.

The electricity cost of operating a heater typically depends on three factors:

  • The energy consumption of the heater.
  • The proportion of the energy consumption covered by solar power.
  • The difference between the grid electricity price and the feed-in tariff.

Let's use a practical example to demonstrate the savings calculation:

If you have a tank water boiler (single-phase, maximum power less than 3.7 kW) and a solar PV system:

Assume your boiler previously consumed 10 kWh of energy daily, and 50% of this energy was supplied by solar power.

After installing our saving kit, you can configure the boiler to be powered entirely by solar energy (this percentage can be adjusted based on your situation).

If the feed-in tariff is 0.05 AUD/kWh and the grid electricity price is 0.25AUD/kWh, then the WPC3700 can help you save up to:

(0.25 - 0.05) * 5 = 1AUD per day

You can estimate the potential savings based on your specific scenario.

FAQ

  • Q: How does the WPC3700 save on electricity bills?
  • A: The WPC3700 ensures that your boilers and heaters use as much solar energy as possible, reducing your reliance on grid electricity. This is especially useful in regions where feed-in tariffs and electricity rates differ significantly.
  • Q: Can the WPC3700 be used without IAMMETER energy meters?
  • A: Yes, the WPC3700 can be used independently or integrated into smart home systems like Home Assistant or Node-RED without IAMMETER meters. However, pairing it with IAMMETER meters provides the added benefit of automatic power adjustment based on available solar energy.
  • Q: Can I integrate the WPC3700 with my existing solar power system?
  • A: Absolutely! The WPC3700 is designed to work seamlessly with solar systems, allowing you to prioritize solar energy for your resistive loads like boilers and heaters.

Item Details

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Wifi Power Controller for Heater or Boiler, Single Phase, 3.7KW, for Solar PV System, Auto Linear Power Output Adjustment, RCM Certified

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