Why Your GoodWe ESA Battery Is Not Charging: Safe Checks to Try First
If your GoodWe ESA battery is not charging, the quickest way to help your installer (and avoid unnecessary call-outs) is to capture what the system is currently reporting: state of charge (SOC), work mode, any schedules or reserve settings, and any fault/alarm messages shown on the screen or in the app. This guide keeps you strictly on the safe side: observation, normal app use, and good evidence gathering.
Because “ESA” can refer to different installed combinations (inverter + battery modules + monitoring), do not assume your exact model variant or settings. If you are not sure what equipment you have, focus on identification and screenshots, then contact your installer or GoodWe support via your dealer.
Stop first: what not to do (safety and warranty)
A battery that will not charge can be linked to protection events, grid limits, or internal battery/inverter checks. Some troubleshooting steps in manufacturer documents involve electrical measurements or power-cycling sequences. Those actions are not homeowner tasks and may be unsafe or affect warranty if done incorrectly.
For this guide, treat your job as “read-only”: look at the display/app, note what you see, and share it with a qualified installer. If you smell burning, hear unusual noises, see damage, or there are repeated fault codes, stop and escalate immediately.
- Do not open covers, remove protective parts, or touch any wiring or terminals.
- Do not use a multi-meter or attempt electrical measurements.
- Do not follow or recreate restart/power-cycle steps or timings; if a restart is needed, make it installer-only.
- Do not change protection, grid, battery, or communication parameters.
Step 1: Confirm what “not charging” means in your app or on the screen
People often describe several different symptoms as “not charging”: SOC stays flat all day, the battery charges only to a certain level then stops, or the system shows a waiting/standby state. Before anyone can diagnose it, you need to capture the exact symptom in a way your installer can verify.
Start by looking for three things: (1) the current SOC, (2) whether the inverter reports a work mode such as waiting/standby, and (3) whether any fault code or alarm text is shown. The GoodWe FAQs specifically advise checking the error message displayed on the inverter screen and then using the user manual FAQ/troubleshooting; if the problem persists, contact your dealer or GoodWe local technical service centre.
- Take a clear photo of the inverter/battery front (closed) showing any status info available.
- In the monitoring app, take screenshots of: SOC, power flow (PV/load/grid/battery), and the event/fault list if available.
- Write down the time of day and weather (sunny/overcast) when you observed “not charging”.
Step 2: Check for visible faults (especially battery-related fault codes)
If a fault is present, charging may be blocked by design until the underlying cause is resolved. Your most useful action is to record the exact fault code and the “fault name” text, then stop and escalate rather than experimenting.
The GoodWe ESA user manual lists a number of battery-related faults. Some examples include precharge failure, relay failure, overvoltage, and reverse connection failure. While the manual includes handling recommendations, several involve checks that are not suitable for homeowners (for example verifying voltages or checking terminals). For you, the safe approach is: capture the evidence, and contact your installer/dealer/after-sales.
- If you see fault codes such as F101 (Battery 1 Precharge Failure), F102 (Battery 1 Relay Failure), or F103 (Battery 1 Overvoltage), photograph the screen/app fault page and share it with your installer.
- If you see F124 (Battery1 Reverse Connection Failure), treat it as urgent: do not attempt any checks yourself; contact your installer/dealer/after-sales service centre.
- If you see PV input mode-related faults such as F122 (PV Input Mode Error) or F123 (Multi-string PV Phase Error), note them too. PV-side configuration mismatches can affect overall operation and may indirectly affect battery charging behaviour.
Step 3: Check whether the system is in a “waiting” state or a normal operating state
Some GoodWe systems can show a waiting mode in the app. A waiting state does not automatically mean there is a defect; it can indicate the unit is not currently able to export/import or operate as expected under current conditions.
Rather than trying to change settings, use waiting/standby as a clue for what to report. In your screenshots, try to capture any line that says “Work mode” as well as the power flow diagram at the same time, so your installer can see whether PV is producing, whether the home has load, and what the grid interaction looks like.
- If the system appears to be waiting while you have sunshine, include that detail (time and weather) in your notes.
- If the battery SOC is very high, it may simply have stopped charging because it is near full; capture the SOC and any message that indicates charge limitation.
Step 4: Check whether the battery is stopping early (SOC “ceiling” behaviour)
Sometimes a battery can appear “not charging” when it is actually stopping at a set limit. The GoodWe FAQs provide examples of batteries stopping at a high SOC or when reaching a configured charge-voltage limit (depending on battery type and settings/app).
You do not need to change anything. Your goal is to determine whether the battery is (a) never charging, or (b) charging up to a certain SOC and then consistently stopping. This distinction is extremely helpful for your installer.
- Note the highest SOC you observe each day for 2–3 days (e.g., stops at 70%, 85%, 95%).
- Capture one screenshot when SOC is rising (if it ever does), and one screenshot when it stops rising (showing the same day).
- If you have historical charts in your monitoring app, export/screenshot the day view showing PV production and battery charge power.
Step 5: Check monitoring/Wi‑Fi status (data issues can look like charging issues)
In some cases, the battery may be charging but your monitoring view is stale or not updating. GoodWe’s FAQ notes that on Wi‑Fi inverters, the yellow POWER LED blinking can indicate Wi‑Fi configuration was not successful, and a solid yellow POWER LED indicates Wi‑Fi was configured successfully.
This does not prove the battery is charging, but it helps rule out the common situation where the app displays old values. If your data is missing or frozen, tell your installer that your concern might be monitoring rather than operation.
- If you can safely see the inverter’s indicator lights without opening anything, note whether the yellow POWER LED is blinking or solid.
- In the app, note the “last updated” time (if shown) and whether today’s graphs are populating.
- If monitoring is not working, use GoodWe’s official FAQ page for general monitoring guidance and then escalate to your dealer/technical service centre if it persists.
Step 6: Identify PV-side clues (because no PV can mean no charge opportunity)
Charging commonly relies on available PV generation (unless you have a configured charge-from-grid strategy). If PV input is limited by a fault or configuration mismatch, battery charging can be reduced or absent.
The ESA user manual includes PV Access Mode descriptions (such as parallel, partial parallel, and independent modes). It also describes that faults like F122/F123 can occur if the actual PV connection mode does not match the set mode, and recommends checking the “PV Access Mode” via the app or screen and correcting it. However, changing such settings and performing any restart steps should be handled by your installer, not you.
- In your app screenshot, capture PV power (kW) at the time you expect charging.
- If you see F122 or F123, note whether it appears only sometimes or constantly.
- Do not attempt to “re-set” PV access modes yourself; send the fault evidence to your installer.
Step 7: Note any backup/outage context that could affect what you observe
Many Solarboss-installed GoodWe ESA systems are designed for backup power behaviour during grid outages, with fast switching that can keep essentials running depending on how backup circuits and loads are set up. If you recently experienced a power cut, it is useful context for your installer when reviewing logs and behaviour.
This guide does not assume any particular backup wiring or configuration in your home. Just record what happened (date/time of outage, whether the home stayed powered, and what you saw in the app afterwards). These details can help correlate the “not charging” report with events in the system history.
- Write down any recent outages and whether you noticed a changeover.
- If you have a generator connection in your system design, mention whether any generator use occurred (without operating anything for testing).
When to stop and call your installer (or GoodWe support via your dealer)
Stop at observation and escalation if you see a fault code, if the battery is not charging for more than a day in good solar conditions, or if the app/screen indicates an error you do not understand. GoodWe’s official guidance is to check the error message on the inverter screen, refer to the user manual troubleshooting, and if the problem persists contact your dealer or GoodWe local technical service centre.
Also stop if you are uncertain about your exact model or battery variant. Your installer can confirm the installed hardware, verify settings, and safely carry out any necessary electrical checks or controlled restart actions that are not appropriate for homeowners.
- Contact your installer immediately if you see recurring battery faults (e.g., F101/F102/F103/F124) or any alarms you cannot clear.
- Contact your installer if the monitoring data appears frozen or Wi‑Fi configuration seems unsuccessful (blinking yellow POWER LED), especially if you cannot reliably see live power flows.
- Share: screenshots/photos, dates/times, SOC behaviour over a few days, and the exact fault code text.
Helpful official and Solarboss resources
Use the official manual and FAQs as your reference points when you are collecting evidence, especially for matching an on-screen fault code to a description. If you cannot access downloads, GoodWe’s FAQ notes you can contact the local technical service centre for help obtaining the relevant online user manual.
If you are a Solarboss customer (or you are checking system expectations), you can also review the product page for an example of an ESA-based home system and its typical capabilities, while remembering that your home’s exact configuration may differ.