SEMS Portal is GoodWe’s monitoring website for solar inverters, batteries and smart meters. You log in at semsportal.com with the account your installer set up or one you register yourself, and the SEMS+ app (iOS and Android) is GoodWe’s current phone app. As at November 2026, GoodWe’s own manuals describe both. This guide is desk research from those manuals, not hands-on use.
Solar Cobber is independent, has no relationship with GoodWe and was not paid for this guide. Nothing here asks you to open an inverter or switchboard.
Key facts
- GoodWe’s SEMS Portal Web user manual (V1.3, 10 January 2024) says the web login address is https://www.semsportal.com and that it supports end user, installer and organisation accounts, with the organisation roles of Administrator, Technician and Browser.
- The GoodWe SEMS+ App user manual (V1.6, 20 September 2026) says the app needs Android 7.0 or later or iOS 15.1 or later, and can be installed by searching “SEMS+” in the app stores.
- GoodWe’s ES LD series manual (V1.6, 22 October 2026) says the WiFi/LAN Kit-20 communication stick flashes its Communication light twice when it is not connected to the router and four times when it reaches the router but not GoodWe’s server.
- The SEMS+ App manual lists an initial local login password of 1234 for connecting directly to a stick or inverter, and tells users to change it on first login.
- The SEMS+ App manual says Monitoring Authorization, which lets an owner control who can monitor or service a plant remotely, applies to the European and Australian servers.
What is the SEMS Portal, and what is SEMS+?
The SEMS Portal is GoodWe’s cloud monitoring service, and “SEMS Portal” is both the website and the name many owners still use for the app. GoodWe’s current app is called SEMS+. The Australian portal page at au.semsportal.com links to a separate SEMS+ web login at semsplus.goodwe.com.
We could not find a GoodWe statement on whether the older “SEMS Portal” app is being retired, or whether one username works on both the old website and SEMS+ web. If your old login fails in SEMS+, try the other, then use the password reset below.
Here is who does what, based on the manuals.
| Tool | Who uses it | What it does |
|---|---|---|
| SEMS Portal web (semsportal.com) | Owners and installers | Plant overview, alarms, historical data, reports, warranty info, user and organisation management |
| SEMS+ app (iOS and Android) | Owners and installers | Remote monitoring and settings, plant sharing, tariff entry, plus Local Access to connect directly to a device |
| SEMS+ web (semsplus.goodwe.com) | Owners and installers | Web version of SEMS+, linked from the SEMS Portal login page |
| SolarGo app | Mainly installers | Local commissioning of the inverter; the ES LD manual still lists it for viewing alarms under Home, Parameters, Alarm |
Table: GoodWe monitoring and commissioning tools, from the SEMS Portal Web manual V1.3, SEMS+ App manual V1.6 and ES LD manual V1.6, checked November 2026.
How do I log in and set up my GoodWe account?
Register as an end user on the login page by choosing Register and following the prompts, or use the details your installer gives you. In the app, you pick a server and an account type when registering. Choose the server for your region, because accounts are tied to one.
Most Australian owners are handed a plant. The web manual says the installer or distributor creates the plant, and the SEMS+ manual says an owner can also create one and an unregistered email address can be invited, which automatically creates an account. Check that the plant is under your own email, so you keep access if the installer changes. If you have no installer, browse solar installers in our directory.
How do I reset a forgotten SEMS Portal password?
Choose Forgot password on the login page. The web manual says you can verify by email or by the inverter’s device serial number (SN). The page also asks users to set a password of 8 to 16 characters with at least one letter and one number.
How do I connect a GoodWe inverter to Wi-Fi?
Wi-Fi setup is done through the SEMS+ app’s Local Access screen, not the website. Go to Service, then Local Access, choose the Bluetooth or WiFi tab that matches your stick, tap Search Device and pick your serial number.
The stick appears under a name that depends on its type, for example WLA-*** for the WiFi/LAN Kit-20 and WFA-*** for the WiFi Kit-20. Enter the initial password 1234 and change it when prompted, then select your home network. Turn on “Bluetooth Stays On” if prompted, or the signal switches off after the session.
If you do not want to work through this yourself, ask your installer. It is a normal part of commissioning.
GoodWe Solar Academy, GoodWe’s official training channel, has a short SEMS+ App 101 series; episode 1 is titled “Get Accurate Data from the Start”.
How do I read the dashboard?
The dashboard shows what your system produced, used, exported and bought, plus battery activity if you have one. The numbers below come from the SEMS+ and SEMS Portal manuals.
| Term | What it means | Notes from GoodWe’s manuals |
|---|---|---|
| Energy Generation | Energy your panels produced | Shown for today, the month and in total |
| Specific Yield | Energy produced per kW of panels | Listed on the web plant overview; this is the figure to compare with the charts below |
| Grid Feed-in Energy | Energy exported to the grid | In SEMS+ plant details |
| Purchased electricity | Energy imported from the grid | In SEMS+ plant details |
| Charging and discharging energy | Energy into and out of the battery | Shown in plant data statistics |
| Revenue and income | Value of generation and export | Needs a tariff entered, or the app cannot calculate it |
| Status Overview | A summary of plant status across your account | Web overview screen |
Table: common SEMS dashboard terms, checked November 2026.
The SEMS+ manual says revenue figures need a tariff entered under plant settings. It also says automatic tariff matching by retailer is limited to certain regions and devices, so Australian owners should expect to enter rates by hand. Without a smart meter at the switchboard, consumption is likely an estimate; see our smart meters and solar guide.
On the web, the Data Selection tool shows inverter working data for up to 7 natural days, and reports can be viewed by day, month or year.
What do the Wi-Fi stick lights mean?
The Communication light on the WiFi/LAN Kit-20 tells you where the connection stops. GoodWe’s ES LD manual (V1.6, 22 October 2026) defines it by how many times it flashes.
| Communication light | What it means |
|---|---|
| Solid on | Wi-Fi or LAN communication is normal |
| Flashes once | Bluetooth is on and the stick is waiting for the app |
| Flashes twice | Not connected to the router |
| Flashes four times | Connected to the router but not to GoodWe’s server |
| Flashes six times | Identifying connected devices |
| Off | Software reset in progress, or no power |
Table: WiFi/LAN Kit-20 Communication indicator, from GoodWe’s ES LD series manual V1.6, checked November 2026. Older sticks have different light patterns, so check the guide for your model.
The Power light is solid when the stick is powered. The Reload button resets the stick with a 0.5 to 3 second press, and a 6 to 20 second hold restores factory settings, which removes your Wi-Fi details. Prefer the short press, and ask your installer before a factory reset.
Common problems and fixes
Offline data usually means the stick has lost the router, not that the inverter has stopped. The inverter keeps producing and protecting itself either way.
| Symptom | Likely cause | What an owner can safely do | When to call the installer |
|---|---|---|---|
| Plant offline, light flashes twice | Router changed, password changed or weak signal | Check the router is on and the Wi-Fi password is unchanged; reconnect with Local Access | Still offline after reconnecting |
| Light flashes four times | Stick reaches the router, not GoodWe’s server | Restart the router and wait a few minutes; GoodWe’s manual says restart the router and inverter | Persists after a router restart |
| Stick not found in the app | Phone too far, other devices attached, app out of date | Update the app, move closer, refresh the device list | Still not listed |
| Cannot find your Wi-Fi network | Weak signal at the inverter | Move the router closer or add a Wi-Fi repeater, per GoodWe’s manual | If signal at the inverter is poor |
| Login fails | No internet on the phone, wrong server, app maintenance | Check mobile data, try later, confirm the server | If your account was never created |
| No data in the app | Router to cloud link interrupted | Check the router and internet are working | If the router is fine |
| Totals look wrong | Smart meter missing or clock error | Compare against your meter readings | Always, as it needs a meter or settings check |
Table: symptoms and fixes, adapted from the fault handling tables in GoodWe’s SEMS+ App manual V1.6 and ES LD manual V1.6, checked November 2026.
GoodWe’s manual includes “restart the inverter” as a step. Isolating and restarting an inverter involves its AC and DC switches, so follow your installer’s instruction for that rather than improvising.
Error and status codes
GoodWe fault codes appear on the inverter’s screen, in SEMS+ and on SEMS Portal web. The ES LD series manual (V1.6, 22 October 2026) lists codes F01 to F40 for that hybrid range. GoodWe warns that faults vary slightly between models, so use your own model’s manual and the on-screen text.
| Code | Name in the manual | What GoodWe says |
|---|---|---|
| F01 | Grid Power Outage | Clears automatically when grid supply returns; check the AC line and AC switch has not been disconnected |
| F02 | Grid Overvoltage Protection | Occasional events are short-term grid issues and clear themselves; frequent events need the grid voltage checked |
| F03 | Grid Undervoltage Protection | Same guidance as F02 for low voltage |
| F04 | Grid Rapid Overvoltage Protection | Grid voltage detection abnormality or very high voltage; occasional events clear themselves |
| F05 | 10 min Overvoltage Protection | The 10 minute average grid voltage was too high; see the manual for the full steps |
| F12 | 30 mA GFCI Protection | Leakage current protection; installer if repeated |
| F18 | Low Insulation Resistance | The manual points to the protective earth and insulation; installer only |
| F34 | AFCI Check Failure | Arc fault self-check failed; installer |
| F35 | Cabinet Overtemperature | Over-temperature of the unit; installer if repeated |
Table: selected fault codes from GoodWe’s ES LD series manual V1.6, 22 October 2026. The full manual lists F01 to F40 plus battery and meter alarms.
Grid voltage codes are common in Australian suburbs with high rooftop solar, because export can lift local voltage. If one repeats, note the date and time, take a photo of the code and send it to your installer; GoodWe asks for the serial number, software version and when the fault occurs. See solar inverter repair and replacement cost for what a failed inverter can cost.
Free tiers, data retention and exports
GoodWe’s manuals do not mention a charge for SEMS Portal or SEMS+, and we could not find a published fee, a retention period or a data deletion policy. Treat any statement that monitoring is permanently free or paid as unconfirmed.
What the manuals do show: the web portal exports operation reports, and the SEMS+ app lets owners set Monitoring Authorization, so only the owner and approved visitors can monitor or perform remote servicing on the plant. Owners can share a plant with an email address, set the permission level and set an expiry.
What should my daily numbers look like?
A healthy system should produce roughly its size in kW multiplied by the city’s daily output per kW. Solar Cobber calculation: multiply the figure from the chart by your system size, then compare it with Generation Today or Specific Yield in SEMS on a clear day.
The Clean Energy Council publishes indicative daily production per kW for major cities in its consumer guide, which we use in our sizing guide.
View the data as a table
| CEC guide output | |
|---|---|
| Alice Springs | 5.0 kWh |
| Darwin | 4.4 kWh |
| Perth | 4.4 kWh |
| Canberra | 4.3 kWh |
| Brisbane | 4.2 kWh |
| Adelaide | 4.2 kWh |
| Sydney | 3.9 kWh |
| Melbourne | 3.6 kWh |
| Hobart | 3.5 kWh |
Alice Springs earns the most per kW of panels and Hobart the least, about 30% lower.
The Clean Energy Regulator’s zone rating gives a more conservative floor. For a 6.6 kW system the two look like this.
- CEC guide
- CER deemed
View the data as a table
| CEC guide | CER deemed | |
|---|---|---|
| Alice Springs | 33.0 kWh | 29.3 kWh |
| Darwin | 29.0 kWh | 27.8 kWh |
| Perth | 29.0 kWh | 25.0 kWh |
| Canberra | 28.4 kWh | 25.0 kWh |
| Brisbane | 27.7 kWh | 25.0 kWh |
| Adelaide | 27.7 kWh | 25.0 kWh |
| Sydney | 25.7 kWh | 25.0 kWh |
| Melbourne | 23.8 kWh | 21.4 kWh |
| Hobart | 23.1 kWh | 21.4 kWh |
On an average day, a 6.6 kW Perth system should land near 29 kWh and a Melbourne system near 24 kWh.
Season matters more than most owners expect. The summer and winter figures below are per kW, from Solar Calculator’s seasonal modelling of 8 kW systems as used in our cloudy days and winter guide.
- Summer
- Winter
View the data as a table
| Summer | Winter | |
|---|---|---|
| Darwin | 4.2 kWh | 4.6 kWh |
| Brisbane | 5.4 kWh | 3.2 kWh |
| Sydney | 5.4 kWh | 2.6 kWh |
| Perth | 6.9 kWh | 2.6 kWh |
| Canberra | 6.2 kWh | 2.4 kWh |
| Adelaide | 6.5 kWh | 2.2 kWh |
| Melbourne | 5.9 kWh | 1.9 kWh |
| Hobart | 5.7 kWh | 1.6 kWh |
Hobart’s winter output is about a quarter of its summer output, while Darwin makes slightly more in winter because summer is its wet season.
| City | Summer day, 6.6 kW system | Winter day, 6.6 kW system |
|---|---|---|
| Darwin | 27.7 kWh | 30.4 kWh |
| Brisbane | 35.6 kWh | 21.1 kWh |
| Sydney | 35.6 kWh | 17.2 kWh |
| Perth | 45.5 kWh | 17.2 kWh |
| Canberra | 40.9 kWh | 15.8 kWh |
| Adelaide | 42.9 kWh | 14.5 kWh |
| Melbourne | 38.9 kWh | 12.5 kWh |
| Hobart | 37.6 kWh | 10.6 kWh |
Table: Solar Cobber calculation, per kW seasonal figures multiplied by 6.6, from the Solar Calculator modelling above. These are modelled clear to partly cloudy averages, not guarantees.
So a Sydney owner seeing 17 kWh in June is normal, while the same figure in January would deserve a closer look. Cloud, shading and a dirty array all pull a day lower. Compare several days, not one, and check whether the dip lines up with a fault alarm in SEMS.
Third-party monitoring and integrations
Home Assistant has an official GoodWe integration that reads the inverter over your local network rather than through the cloud. Home Assistant’s page says the inverter must listen on UDP port 8899, lists ET, EH, BT, BH, ES, EM, DT, MS, D-NS, XS and BP families as supported, and suggests enabling the Modbus TCP option on the stick if the connection fails. It also warns that frequent polling can conflict with updates to the SEMS cloud.
For retailer or virtual power plant (VPP) control, the SEMS+ manual says third-party Remote Control needs authorisation, and that the owner’s Monitoring Authorization setting governs who can service the plant. A VPP is a group of home batteries an operator controls together; see what a VPP is in Australia. Ask the retailer which GoodWe models and firmware it supports before you sign.
What GoodWe hardware are you monitoring?
Our GoodWe inverter review and GoodWe Lynx home battery review cover the hardware, and the GoodWe in Australia guide covers the brand, support and warranty. Our review notes the 10 year inverter warranty on some models depends on registering the system on SEMS, so confirm your plant shows warranty information under the portal’s Warranty menu. For a rival’s app, see the iSolarCloud guide or the Fronius Solar.web guide.
When to call your installer
Call your installer if the stick shows two or four flashes after a router restart, if a grid, insulation, arc or temperature code repeats, or if production is persistently below the figures above on clear days. If the installer has closed, see our tracker of Australian solar company failures and submit a ticket through GoodWe’s Online Support page, with your inverter serial number ready.
FAQ
What is the SEMS Portal?
The SEMS Portal is GoodWe’s cloud monitoring website for GoodWe inverters, batteries and smart meters. It shows production, alarms and reports. The SEMS+ app is its newer phone companion.
How do I log in to SEMS Portal?
Go to semsportal.com and enter the account and password for your registered end user account. If you have none, choose Register, or ask your installer to create the plant under your email. The portal’s login page also links to SEMS+ web.
What is the difference between SEMS Portal and SEMS+?
SEMS Portal is the original GoodWe monitoring website and SEMS+ is GoodWe’s current app and web platform with remote settings, Local Access and AI scheduling features. GoodWe’s manuals cover both. We could not find a published statement about retiring the old app.
Why is my GoodWe inverter offline in SEMS?
Offline usually means the Wi-Fi stick cannot reach your router or GoodWe’s server, while the inverter keeps working. Check the stick’s Communication light: two flashes means no router, four flashes means no server. Restart the router, then ask your installer if it persists.
How do I reset my SEMS Portal password?
Choose Forgot password on the login page and verify by email or by the inverter’s serial number. The new password must be 8 to 16 characters with at least one letter and one number.
What does GoodWe fault code F01 mean?
F01 is Grid Power Outage, meaning the grid supply was lost or the AC line or switch is disconnected. GoodWe’s ES LD manual says it clears automatically when grid supply returns. Call your installer if it persists with the grid on.
Can I change my GoodWe battery settings in SEMS+?
Owners can change some operating mode and schedule settings, but the parameters you see depend on your login role, device model and safety code. Grid protection settings are intended for installers. Ask your installer what your account can change.
What is the SolarGo app?
SolarGo is a GoodWe app for local connection to an inverter, used mainly by installers during commissioning. GoodWe’s ES LD manual still lists it for viewing alarms. SEMS+ also has a Local Access function.
Sources
- GoodWe, SEMS Portal Web user manual, V1.3, 10 January 2024
- GoodWe, SEMS+ App user manual, V1.6, 20 September 2026
- GoodWe, ES LD series user manual, V1.6, 22 October 2026 (indicators, fault codes)
- GoodWe SEMS Portal Australia login page
- Home Assistant, GoodWe integration
- Clean Energy Regulator, postcode zone ratings
- Solar Calculator, seasonal solar production in Australia
About this guide
By the Solar Cobber editorial team. This is independent desk research checked in November 2026, based on GoodWe’s published manuals rather than hands-on use. Solar Cobber is a free directory that may earn referral or advertising fees from installers, and commercial relationships never affect our content. This is general information, not financial or electrical advice. Corrections are welcome via /contact.
Filed under Solar Guides
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