Quick Answer
Okay, so here's the quick version. Your solar diverter isn't giving you free hot water, which is definitely a bummer. Most commonly, the problem lies with the diverter unit itself, loose wiring, a faulty water heater heating element, or a simple setting or tripped breaker. A fix could be free if it's a reset, or it could run you up to $1000 if the whole diverter needs replacing, especially if professional installation is required.
Common Symptoms
Possible Causes
Step-by-Step Diagnosis
Step 1
Check all relevant displays (diverter, solar app) to confirm you have excess power and see if there are error codes.
Step 2
With power OFF, check the hot water tank's thermostat and press the high-limit reset button.
Step 3
With power OFF, visually inspect wiring for any burnt, loose, or disconnected wires at the diverter and tank.
Step 4
For qualified individuals only - Use a multimeter to check for ~240V at the heating element terminals when the diverter should be active.
Step 5
Review the diverter's settings in its menu or app to ensure it is configured correctly.
DIY vs Professional Costs
| Repair Type | DIY Cost | Professional Cost | Time Required |
|---|---|---|---|
Resetting Breakers / Diverter / Tank | $0 | $100 - $250 (for a service call) | 5 minutes |
Tightening Loose Wiring (Power OFF) | $0 - $15 (for screwdrivers) | $150 - $350 | 30-60 minutes |
Replacing Water Heater Element | $20 - $70 (part & tools) | $200 - $500 | 1-2 hours |
Replacing Solar Diverter Unit | $300 - $700 (part only) | $500 - $1000+ | 1-2 hours |
When to Call a Professional Solar
- If you see any burnt, melted, or blackened wires.
- If the diverter shows a persistent fault code that a simple reset doesn't fix.
- If you are not 100% comfortable and trained to work with live 240V electricity.
- If your system is still under warranty from the installer.
Prevention Tips
- Check your solar and diverter apps regularly to spot issues early.
- Make sure the diverter unit has plenty of ventilation to prevent overheating.
- Keep the diverter's firmware updated through its app.
- Perform regular maintenance on your hot water tank, especially checking the anode rod.
Frequently Asked Questions
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