smarthome.log

Technical changelog for home automation projects

Real solutions. Actual configs. No fluff.

Hardware

SolarEdge Home Load Controller

Essence

A small wireless relay that lets SolarEdge decide when a device is allowed to run.

It doesn’t power heavy loads directly.
It sends a simple on/off signal (dry contact) — usually to a contactor or to a device control input.

Use it to:

  • run devices only on solar surplus
  • disconnect non-essential loads during outage
  • protect inverter and battery

It can also be used with devices that support SG Ready — instead of full smart integration, you simply control the SG Ready input and let the device adjust its behavior internally (e.g. heat pump boosting when surplus PV is available).

Think of it as a bridge between SolarEdge logic and traditional electrical control inputs.

Key technical data

SolarEdge Home Load Controller (SEM-DCS-R08-00)

ParameterValue
Supply voltage90–250 Vac, 50/60 Hz
Relay contactsNO / NC dry contact
Max current (NO)8A @ 250 Vac / 8A @ 30 Vdc
Max current (NC)4A @ 250 Vac / 4A @ 30 Vdc
Power consumption< 1.5W
Operating temperature-10°C to +50°C
Ingress protectionIP30 (indoor only)

Rule of thumb: for meaningful power (boilers/heaters/pumps) → use a properly rated contactor, and let this device only switch the control side.

Integration requirements

  • Works inside SolarEdge Home (not a generic Wi-Fi/HomeKit relay).
  • Needs SolarEdge Home Network / communication board (plug-in) and configuration via mySolarEdge / SetApp.

Installation notes

  • Indoor only; avoid closed metal enclosures if you care about wireless performance.
  • Mounting options include wall screws, double-sided tape, DIN rail adapter.

Pricing

Observed EU retail listings typically land around €65–€130 depending on shop/VAT/shipping. Observed Poland listing example: ~440 PLN gross.

Documentation

Related logs

Results: 1
hardware: SolarEdge Home Load Controller

Filter by tags

v0.100.0
  • cost-reduction
  • off-grid
  • +1
Energy-aware heat pump control using SG Ready
Problem

The off-grid backup system could not operate reliably during real grid outages and power failures. When a grid loss occurred: The SolarEdge Backup system attempted to transition into off-grid mode At the same time, the heat pump was free to start according to its internal logic Compressor startup caused a high inrush power demand The inverter and battery could not supply this peak instantly As a result: The off-grid transition failed or became unstable Inverter protection mechanisms were triggered Backup operation required manual intervention To keep the system running during a power outage, the heat pump had to be manually enabled or disabled at the right moment. In practice: Off-grid operation during a grid failure depended on human action. This led to: No reliable automatic behavior during outages High risk of incorrect timing under stress Reduced system resilience exactly when backup power was needed most The setup worked under normal conditions, but failed precisely during grid fa

Outcome

After introducing SG Ready-based control using the SolarEdge Home Load Controller, the system now behaves predictably during real grid outages. Off-grid transitions are stable and repeatable The heat pump no longer starts during unsafe moments Backup operation works without manual intervention Startup power spikes no longer destabilize the inverter PV surplus is used only when conditions allow it The backup system now works automatically and reliably, exactly when the grid is unavailable.

  • Nibe F1145 PC
  • SolarEdge Home Load Controller
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