About the Wi-Fi Configuration

1. Why can't I find the WiFi signal on mobile devices?
   Normally the WiFi signal can be seen immediately after inverter has powered up. However, the WiFi signal will disappear when the inverter connects to the internet. If settings need to be changed, please connect the router. If you cannot find the WiFi signal or connect to the router, please try to reload the WiFi.
2. Why can't I connect to the WiFi signal on my phone?
   The WiFi module can only connect to one device at a time. If the signal is already connected to another device, you will not be able to connect to the signal.
3. Why is there no output on the backup side?
   It's possible that there are special characters not supported by module in the hotspot passwords. Please modify the password to consist of only Arabic numerals or uppercase / lowercase letters.

About Battery Operation

1. Why does the battery not discharge when the grid is not available but it discharges normally when the grid is available?
   On the APP, the off-grid output and backup function should be turned on to force the battery to discharge under off-grid mode.
2. Why is there no output on the backup side?
   For backup supply, “Backup Supply” on the App must be turned on. In off-grid mode or when the grid power is disconnected, the “Off-Grid Output Switch” function must be turned on as well.
   (Note: When turning the “Off-Grid Output Switch” on, do not restart the inverter or battery. Otherwise, the function will be switched off automatically.)
3. Why does the battery SOC suddenly jump to 95%?
   This normally happens when BMS communications fail when using lithium batteries. If the batteries enter float charge mode, the SOC is automatically reset to 95%.
4. The battery cannot be fully charged to 100%?
   The battery will stop charging when the battery voltage reaches the charge voltage set in the PV Master App.

About PV Master Operation And Monitoring

1. Why can't I save settings on the App?
   This could be caused by losing the connection to WiFi.
2. Why are the data displayed on the homepage different from the param page, like charge/ discharge, PV value, load value, or grid value?
   The data refresh frequency is different, so there will be data discrepancies between different pages on the APP as well as between these shown on the portal and APP.
3. Some columns show NA, like battery SOH, etc. Why does that happen?
   NA means that the App has not received data from the inverter or server because of communication problems, such as battery communications and the communications between inverter and the App.

About the CT and Power Limit Function

1. How to activate the output power limit function?
   This function can be activated by following these steps: 1) Make sure the Smart Meter/CT connections and communications are functioning correctly. 2) Enable the anti-reverse current function on the APP, and set the maximum allowable reverse current power to the grid on the APP.( Note: Even if the output power limit is set to 0W, there might still be a deviation of a maximum of 100W when exporting to the grid.)
2. Why is there still power exporting to the grid after I have set the power limit to 0 W?
   The export limit could theoretically be 0W but there will be a deviation of around 50–100 W.
3. Can I use other meter brands to take over from the Smart Meter in the system or to change settings in Smart Meter?
   No, because the communication protocol is integrated into the inverter and Smart Meter, other meter brands cannot communicate. Also, any change to the manual settings could cause a meter communication failure.
4. What is the maximum current allowed to pass through the CT ?
   The maximum current for the CT is 88A.

Other Questions

1. Is there a quick way to make the system work?
   For the shortest resolution, please refer to “Quick Installation Instructions”.
2. What kind of load can I use to connect to the backup side?
   Please refer to User Manual.
3. Will the warranty of the inverter still be valid if, for some special conditions, we cannot follow 100% of the User Manual instructions for installation or operation?
   Normally we still provide technical support for problems caused by not following the instructions in the User Manual. However we cannot guarantee any replacements or returns. So, if there are any special conditions for which you cannot follow the instructions 100%, please contact the after-sales department for suggestions.

1. Is the 5kWh Residential Energy Storage System safe？
   Hinen 5kWh Low-voltage Battery is LiFePO₄ batteries, which are the safest Lithium Battery thanks to they have superior thermal and chemical stability compared to lead acid or other lithium ion batteries, they also do not suffer from 'thermal runaway' like some lithium ion cells.
   Another safety benefit of the LiFePO₄ is that lithium iron phosphate is not toxic. Therefore, you can dispose of it more easily than lead-acid and Li-ion batteries.
2. Why can the 5kWh Low-voltage Battery reduce my electricity bills?
   Solar panels power your home and store surplus energy in the 5kWh Low-voltage Battery during the day, while the 5kWh Low-voltage Battery power your home at night or during power outage, which ensure the most efficient use of solar energy at home and increase self-consumption and grid independence, reduce your electricity bills.
3. How can I check the residual amount of my 5kWh Low-voltage Battery?
   If you install the 5kWh Low-voltage Battery, we will help you install the Hinen APP, which will be used to check the operation of your 5kWh Low-voltage Battery, including the usage and residual amount.

1. What is the maximum number of battery packs that can be stacked and clustered in parallel for the 8.9kWh High-voltage Battery Module?
   The 8.9kWh High-voltage Battery Module supports a maximum of 3 battery packs stacked in a cluster and 6 clusters connected in parallel, 18 battery packs in total.
2. What are the requirements that need to be met before stacking the 8.9kWh high-voltage battery packs?
   - Prioritize selecting battery packs with the same "cell grade barcode" for series connection.
   - To avoid overstocking, a single remaining battery pack is allowed to be connected in series across different grades with other packs.
   - The voltage difference between packs must be below 0.3V. If the voltage difference is too high, each battery pack must be charged to full voltage using a 12kW three-phase inverter before series connection.
3. Which cell model is used in the 8.9kWh High-voltage Battery Module?
   8.9kWh High-voltage Battery Module uses 52Ah cells. Each battery pack consists of 54 cells in series, with a standard cell voltage of 3.2V. The battery cell is equipped with a built-in heating film. When the temperature drops to -40℃, the heating film activates automatically and continues operating until the temperature rises to the designated operating level.
4. Which products can the 8.9kWh High-voltage Battery Module be paired with?
   It can be paired with Hinen’s three-voltage inverters, such as 5~12kW Three-phase Hybrid Inverter and A Series All-in-One RESS（A3600S~A5000S\A8000S~A15000S\A10000T~A25000T）.

1. How does the A Series All-in-One RESS supply power to a heat pump? How does it work?
   The generator port can be connected to either a generator or smart loads such as heat pumps, water heaters, or air conditioners in A Series All-in-One RESS, which supports both dry contact and CAN communication to control the start and stop of smart loads.
   You can manage this through the Hinen APP using the Smart Load Mode. For example, you can turn smart loads on or off manually or via automate control based on configurations such as, turning on the load when the battery SOC reaches 90% and feed-in power exceeds 5 kW, and turning it off when SOC drops to 50%.
2. How can the 15kW A Series All-in-One RESS be used with a third-party on-grid inverter at the customer's home?
   The third-party on-grid inverter can be connected to the Grid port to create an AC-coupled solution. The A Series All-in-One inverter is equipped with grid-forming technology, allowing the third-party inverter to operate normally even during grid outages when connected to the GEN port. This connection enables the A Series All-in-One RESS to simulate the voltage and frequency of the grid, ensuring stable performance.
3. What is the Grid-forming function, and how does the Hinen A Series All-in-one RESS support it?
   The Grid-forming function refers to the ability of a power generation system—such as in micro-grids or distributed generation setups—to independently and stably control power output while creating and maintaining grid voltage and frequency. This function is typically performed by one or more generation units (e.g., inverters or generators) that can operate without support from the main utility grid, providing stable electricity for other loads or devices. The Grid-forming function is especially important in Islanding mode, as it ensures power quality and system stability.
   When the grid is down, PV inverters typically stop working. By connecting a third-party inverter to the EPS port (be sure not to overload it) or the generator port of the Hinen A Series All-in-One RESS, the system can simulate grid voltage and frequency through the Hinen inverter port. This creates a micro-grid, allowing the PV inverter to continue operating and supplying power to EPS loads.
4. What is the function of the transfer switch in the A Series All-in-One RESS ‘s control box?
   The transfer switch is an interlocked Single Pole Double Throw (SPDT) switch. When one side is connected, the other side is automatically disconnected. In the event of an inverter fault or maintenance, the switch can be manually set to by-pass mode, allowing the grid to power household loads directly.
5. What are the advantages of 4 MPPTs in comparison with 2 MPPTs?
   A system with 4 MPPTs (Maximum Power Point Trackers) allows solar panels to be installed in four different orientations, better adapting to sunlight from various directions throughout the day. This reduces the "bottleneck effect" (where weaker-performing panels drag down the overall output) and significantly improves the overall power generation efficiency of the solar array.