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Mi Techo Solar
For existing clients

Inverter guides & self-service support

Changed your router, moved to a new tariff or need a restart? These guides let you handle the small things yourself, in English, Spanish and Dutch, for the brands we install: Huawei, Solplanet, Deye, Livoltek and Enphase.

Change or reconnect the WiFi

Change tariff and time slots

Safe system restart

Monitoring and data

Choose your inverter brand

Huawei

FusionSolar app (SUN2000 / LUNA2000)

Huawei SUN2000 inverters and LUNA2000 batteries are managed with the FusionSolar app. The app has two entry points: your owner account (monitoring) and a direct local WiFi connection to the inverter (settings).

  1. Check that your router broadcasts on 2.4 GHz (the inverter will not join a 5 GHz-only network) and have the WiFi password ready.
  2. Open the FusionSolar app, tap the scan icon (top right) and scan the QR code on the side of the inverter or the Smart Dongle.
  3. If scanning is not possible, connect your phone to the inverter's own WiFi network (starts with “SUN2000-…”) from your phone's WiFi settings.
  4. Only log in as “installer” if we asked you to; for a WiFi change the owner login is normally enough.
  5. Go to “Settings” → “Communication” / “Router connection” and select your new WiFi network.
  6. Enter the password, save and wait 2–3 minutes until the communication LED stops blinking red.
  7. Return to the app with your account and confirm the plant is “Online” again.

Tip: If you switch internet provider the network name usually changes even when the password stays the same, repeat this procedure.

  1. Open the FusionSolar app and go into your plant.
  2. Go to “Me” / “Devices” → select the inverter → “Settings” → “Energy control” or “Battery management”.
  3. Pick the working mode: “Maximum self-consumption” (normal with a flat tariff) or “TOU / Time-of-use” if you have a time-banded tariff.
  4. In TOU mode add the slots: start time, end time, “charge” or “discharge”, and the weekdays.
  5. Save and check the next day in the graph that the battery follows the new schedule.

Tip: Spanish 2.0 TD tariffs have three periods (peak, standard, off-peak) and differ at weekends and public holidays, configure Saturday and Sunday as well.

  1. First switch off the inverter's AC breaker in the consumer unit.
  2. Set the inverter's DC switch to “OFF” (and the battery switch, if fitted).
  3. Wait 5 minutes until the LEDs go out.
  4. Switch back on in reverse order: battery → DC → AC.
  5. Wait 5–10 minutes: the system restarts by itself and resumes production.

  1. Log in to the FusionSolar app or fusionsolar.huawei.com with your owner account.
  2. “Plant” shows today's production, self-consumption and battery state of charge in real time.
  3. Under “Reports” you can export data per day, month or year (handy to compare with your bill).
  4. If the plant shows “Disconnected” while the inverter is producing, it is a communication (WiFi) issue, not a production issue.
Huawei FusionSolar – official siteFusionSolar portal

Safety first

  • •Never open the inverter housing or touch DC wiring: dangerous voltages are present even when the system is off.
  • •These steps are user settings only (WiFi, tariffs, restart). Any electrical work is done by us.
  • •Smoke, a burning smell or a breaker that keeps tripping: switch off the AC and call us immediately.

Still stuck? We're one message away

Send us the brand, the serial number and a photo of the screen or error code, and our service team will pick it up. Mi Techo Care members get priority response.

Contact supportDiscover Mi Techo Care

Frequently asked questions

With the FusionSolar app: scan the inverter QR code or join its “SUN2000-…” network, go to Settings → Communication → Router connection and pick your 2.4 GHz network. The plant returns “Online” within a few minutes. Full steps are in the Huawei tab above.

It is almost always WiFi communication, not production: if the inverter keeps generating, your system is fine. Reconfigure the dongle or WiFi connection (steps per brand above) and check your router broadcasts 2.4 GHz. Still offline after 15 minutes? Message us on WhatsApp at +34 672 81 45 13.

Yes, a breaker restart is safe: switch off AC, then DC (and the battery), wait 5 minutes and switch back on in reverse order. Never open the housing or touch DC wiring. If the fault returns, send us the error code.

In your brand's app enable time-of-use mode and enter the three 2.0 TD periods: peak, standard and off-peak, including Saturdays, Sundays and public holidays, which are off-peak all day. Exact steps for Huawei, Solplanet, Deye, Livoltek and Enphase are above.

Yes. These guides are public and free for anyone in Málaga and on the Costa del Sol. If you need on-site support, maintenance or takeover of an existing system, we can do that through Mi Techo Care, get in touch and we'll look at it.

Huawei (FusionSolar), Solplanet/AISWEI, Deye (SOLARMAN Smart), Livoltek (My Livoltek) and Enphase (IQ Gateway), with the official sources linked at the bottom of the page.

Sources

These guides are based on the official manufacturer documentation below. App menus can differ slightly per firmware or app version. Links and steps last checked on 2026-08-24.

Keep exploring

Related services, projects and answers for this page.

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