1.How and when should the so-called Night Mode be "activated" ?
Answer : If the inverter does not start in the morning when the light is low.
2.Which RCD should be used ?
Answer: Basically all our units have a RCMU ( Residual Current Monitoring Unit ) -> we have to use type A and at least 40 A / 100mA ( 30mA is too sensitive ).
3.What can you set when the batteries are recharging from the mains ?
Answer: Using the “Charge Time” function in the Fox Cloud, you can specify a “time window” for the inverter to charge.
4.If I already have an existing installation and I want to have one and a new installation with batteries, what do I do ?
Answer: The customer can purchase a hybrid with a battery, in which case he also needs a second smart meter.
5.A guide to parameterising the Chint Meter .
Answer : to be found under:
https://chintglobal.com/products/dtsu666-three-phase-din-rail-meter-8-1007
6.When the temperature drops to 3 °C, the battery is automatically recharged from the mains to 60 % SOC, what is the reason for this ?
Answer: It is stored in the software, because otherwise batteries are damaged when the temperature drops below zero. That is why we have set an automatic “fall-back temperature” (3°C).
7.What can I do if I have created the account incorrectly or have forgotten the password ?
Answer: Unfortunately, the only option is to delete the account or create a new one.Please contact the service department.
8.If the inverter has been recognised as defective, what is the replacement process?
Answer: If your inverter or other device does not function properly, please create a ticket under the following link: https://support.fox-ess.com/ Please also include the serial number, pictures of the fault and connection and your address. If the device is recognised as defective, a new device will be sent to you by our logistics company. The defective unit must be returned in the original box and will be collected.
9. How do I get the Modbus registers?
Answer: If you would like to develop your own controllers (loxone, Homematic, etc.), you can obtain the Modbus registers by signing a so-called NDA. Please apply for this NDA at: https://support.fox-ess.com/. You must sign this NDA and return it to the service
department. After checking, you will be provided with the appropriate Modbus register for your device.
10. Does the system do automatic updates?
Answer: We only install updates after consultation and approval by the customer. This can be done remotely via the Fox Cloud or directly on the device via a USB (Vers 2.0) stick. Automatic updates are currently not activated.
11. Which safety standard / country code do I have to set and how does it work?
Answer: For Germany low voltage please use the standard VDE ARN4105 (if PV system < 135 kw). For PV systems > 135 kw, you must set the VDE ARN 4110. For Austria please use the grid code “TOR Erzeuger Typ A” and for Switzerland please use the grid code “NAEEA- NE7-CH2020” and/or VDE ARN 4105.
12. Why does the inverter not start during commissioning?
Answer: In the settings, the unit is set to STOP at the factory; for safety reasons, this must be actively set to START. This must be done directly on the display. In the “Master-Slave” system, you must also activate the “Master” here on the display.
13. Why can't you close the whole house on the EPS connection?
Answer: This is only a “backup” function for emergency power supply. This means you should only really connect loads to it that you absolutely need in the event of a blackout. The power that can be supplied per phase ranges from 1.4 kW ( H3 with 3 battery
modules ), up to 3.4 kW / phase ( H3 with 7 battery stacks ). The switching time is < 20 ms. If you want to supply the whole house with emergency power, you need an external box.
14. The battery system beeps loudly and flashes red and is not recognised by the inverter ?
Answer : If the battery worked well before, please update the system via Fox Cloud or USB. Otherwise, please check if the BMS ( Battery Management System ) and the slaves have the right version ( See V1.0 / V2.0 ). And make sure that the rotary switch on the BMS is set correctly according to the number of slave modules.
15. H series: slave module count minus 1 ( AIO series: battery module count minus 2 ) Should a DTSU666 be used in a three-phase network when using an H1-x?
Answer : In Germany, a three-phase Meter Chint DTSU 666 should always be used.
16. Can master and slave be used on one memory or should there be 2?
Answer: Only the master is connected to the batteries. The slave only serves as an
energy supplier, so to speak.
17. Which interface partners will we have in 2023? Answer : Plexlog, Solarlog, Meteocontrol, myPV, Consollinno Which pins should be used to connect the Chint Smartmeter ?
Answer: Please refer to the manual, e.g. for H1 (pin 1 -> 25 and pin 2 -> 24) and for H3 (pin 3 -> 25, pin 4 -> 24).
18. Is a WiFi dongle included in the delivery or does it have to be ordered separately?
Answer: The Wifi dongle is included in the delivery. The LAN dongle or the 4G dongle must be ordered separately
19. Which design tool do you recommend ?
Answer: We recommend using PV Sol (from week 15 / 2023). We will also provide our own design tool from Q3.
20. Which SoC should be set ?
Answer: We recommend setting a minimum SOC of 10 %. We recommend setting a minimum SoC (on grid) of 15% (in any case, the gap between these two values should be 5%).
21. How and where can I set the cos phi ?
Answer: You will receive a letter from your energy supplier when you agree to feed into the grid, describing the setting value of the cos phi. ( e.g. – 0.9 ) . You can set (or change) this value in the Fox Cloud.
22. How can I update the units?
Answer: There are 2 ways to update the devices: The SW update works best via the cloud (if you have registered your device there). Otherwise, there is the possibility to update the devices via a USB stick.
23. Can I connect different string lengths to the second MPPT (dual MPP for larger units)?
Answer: No, with “Dual MPPT” strings of the same length (e.g. 18 modules or 20 modules) must always be used. With 2 MPPT, we advise the most symmetrical wiring possible, whereby different outputs are also possible.
24. When my hybrid system with battery is connected to the mains, the system sometimes recharges from the mains at night (trickle charge). How can I prevent this?
Answer: In the Fox Cloud there is a setting ” Charge – Time ” , where you can set how and when the unit is allowed to recharge ( e.g. only from 8 am, until 8 pm ).
25. At present, the total yield still totals the energy fed into the solar system together with the power generated by the battery. When will this be changed?
Answer: Yes, that’s right. In the new release for the Fox Cloud we will show this separately. ( PV yield and yield from the batteries )
26. The purchase and feed-in powers in the Fox Cloud differ slightly from the measured powers from the digital meter of the grid supplier. How come?
Answer: The devices themselves, as well as the smart meter, have small measurement tolerances and measure time intervals. Certain minor deviations result from the measurement inaccuracies (power equals voltage times current).
27. If I want to change a battery module or extend my battery, what is the best way to proceed ?
Answer: Charge your existing battery tower to a SoC of 30-40 % (this is approximately the SoC at which the new slave should arrive). Then please measure the voltages at the DC ( + /- ) contacts – here the voltage difference must not be greater than 0.5 V. If this is the case, you can easily add the new battery module to the battery tower and restart it (the BMS will then calibrate the entire tower).
28. How do I create a "representative" account and what does it mean?
Answer: As an installer, it is best to choose the “Agent” role. This gives you the most setting options in the Fox Cloud. You will then receive a so-called code (agent code) which you can give to the end customer during the installation when he logs into the Fox
Cloud. In this way, the cloud knows which customer is assigned to which installer. This allows you to keep track of all end customer installations.
29. The cable between my hybrid inverter and the battery tower is not long enough, what can I do?
Answer: In the old version of the cable lengths, we still supplied a 1.25 m battery cable. We have now adapted this to 3 metres. This should be suitable for most applications.
30. How do I proceed if the customer wants to expand his "existing system" with gridconnected inverters with batteries?
Answer: There are 2 possibilities: You buy a hybrid inverter (H3) with batteries (incl.2.tem SmartMeter) or you buy an AC system (so-called AC3 system).
31. What is the password for pairing the wifi module to the inverter and how do I find the inverter in the connection ?
Answer: The password for pairing is : mtmt2020 and the inverter reports with a network starting with “w”. After pairing your smartphone to the inverter, you can connect to the router.
32. How can I get the warranty extensions or how long can I extend the warranty maximum ?
Answer: You can have the product warranty extended through your wholesalers. The maximum warranty period is 25 years at present.
33. Can the wallbox ( Fox charging station 7kw, 11kw or 22kw available ) overcharge ?
Answer: No, as of March 2023, we can only guarantee this with our interface partner (such as Plexlog or Solarlog). At the end of the year, Fox will release its own energy management system (EMS). This is currently under development.
34. Can I control the heating elements directly?
Answer: This will be possible in the near future in conjunction with myPV (Thor Actor). This will then allow commercial heating rods to be controlled with a choice of 3kw, 5 kw or even 9kw, and there will no longer be any need to feed surplus electricity into the grid.
35. What is the maximum number / minimum number of battery modules that I can connect to the H3 or H1 ?
Answer: You can connect min / max 3 – 7 modules to the H3 ( 3 ~ Hybrid 5-12 kW ), and min / max 2-6 modules to the H1 ( 1~ Hybrid ).
36. What is the best way to set the SoC ( State of Charge ) for the batteries ?
Answer: We recommend setting the minimum SoC to 10 % and the minimum SoC (gridconnected) to 15 %. You can set the maximum SoC to 100 %.
37. When does the warranty period start ?
Answer: The warranty starts on the day of commissioning (or 6 months after delivery of the product), whichever comes first. You can find our current warranty conditions at:https://www.fox-ess.com/downloads/
38. Where can I register my equipment online ?
Answer: You can register your product at : https://de.fox-ess.com/warranty-registration-2/#1603450715600-8ef1244c-c15c.
39. How many amps can I loop through the SmartMeter Chint DTSU 666 ?
Answer: You can loop through the SmartMeter up to 80 A, above 80 A please use current transformers, which you must install according to the instructions ( please note the direction of the arrows ( pointing to the house or to the mains! ).
40. How can we realise the ripple control receiver - system control ?
Answer: As of today with our interface partner Plexlog (potential-free contacts) and from the next generation H-series and T-series also on the unit itself. The same applies to the R series.
41. What options do I have for connecting to the Fox Cloud?
Answer: You can use the Wifi dongle ( enclosed ), if you do not have router reception in the basement, order the WLAN ( wired ) from the wholesaler and if you are in a rural area or on the roof, you can use the 4G dongle. (A 4G dongle whose free period has expired can be replaced with a WiFi dongle free of charge, or a new 4G dongle with costs must be purchased from the retailer).
42. Where can I find the certificates for NA protection, declarations of conformity and other certificates ?
Answer: You can download all our current certificates in the download area at Find https://www.fox-ess.com/downloads/
43. Are Fox ESS inverters / batteries compatible with other batteries ?
Answer: At present, it is not possible to connect other “third-party products” with our inverters. In the area of low-voltage batteries, we have a cooperation with Solis / Ginlong, i.e. our LV batteries are compatible with Solis.
44. Which optimisers work with the Fox ESS products ?
Answer: Our products are compatible with Tigo optimisers. You can use them to implement module-level monitoring on the Tigo platform.
45. What is the best way to reach the service / after sales department ?
Answer: Our service hotline is: +49 (0) 405 3799 2120 and you can also open a ticket at: https://support.fox-ess.com if you have any problems. Please enter the serial number of the product, as well as a description of the error and any photos. Please also state where you bought the product, as well as your current address and / or contact details.
1.What should I do or know before installing the EV Charger?
The installation must be carried out by a certified professional. Before installing the EVSE, carefully read the installation manual and ensure you are familiar with all relevant local electrical regulations to guarantee a safe and compliant commissioning process.
2.What should I do right after installing and powering up the EVSE?
Once powered on, our chargers are ready to begin charging. If additional setup is required, download one of the available FOX Apps (FoxCloud 2.0, FoxSwitchAPP or Elite Charger). Start by creating a user account, then link the charger to the app. Once linked, you can proceed with further setup and configurations. Be sure to enable Bluetooth on your smartphone and grant the necessary permissions for a smooth connection.
3.How can I connect my EV charger to WiFi?
To connect the EV charger to WiFi, first link the charger to the FOX app. Once connected, you can search for and select an available 2.4GHz WiFi network directly through the app. To ensure optimal performance, ensure you have a stable WiFi connection. The EV charger should be located with minimal interference no more than 10 meters from the router.
4. Do FOX EV chargers support Load Balancing?
Yes, our chargers support both local and dynamic load balancing. Both features can be set up through the FOX app. For dynamic load balancing, an additional, compatible Smart Meter must be installed.
5. Which APP do I need to control/commission the EV Charger for the first time?
The app you choose depends on the level of control and functionality you need for your EV charger:
FoxCloud 2.0: Provides full control of the EV charger and is recommended for integrations with FOX ecosystems. Available in multiple languages.
FoxSwitch: Offers full control of the FOX EV charger only. Available in English, German and Italian.
Elite Charger APP: Designed speci
6. What are the differences between the 3 operating modes?
Green Mode: This mode uses only surplus energy from the PV (Photovoltaic) system to charge the electric vehicle (EV). Energy generated by the PV system is first directed to meet household consumption, and any excess energy (minimum 6A) is then used for EV charging. It is best suited for larger PV systems to ensure a steady energy surplus.
Eco Mode: Similar to Green Mode, this mode prioritizes surplus solar (PV) energy for EV charging. If the solar energy isn’t enough, the system will draw up to 6A from the grid to ensure the charging process remains steady and uninterrupted.
Fast Mode: This mode delivers maximum charging performance by combining energy from both the PV system and the grid. It is ideal for situations requiring rapid EV charging.
Important Note on Home Battery Systems:
For PV systems with battery storage, manually set the battery’s State of Charge (SOC)
to 90%-100% during EV charging. This prevents the battery from discharging energy to the EV.
7. No protection class is specified in the technical data, is it I or II?
The EMC classification is either Class 2 or Class B.
8. Is separate grounding required?
No, works via normal connection L1, L2, L3, N, PE
9. Do I need an external FI type A or type B?
An FI type A 30mA is recommended. Please check your local electrical regulations to
ensure a safe and compliant installation.
10. Can I control the EV Charger via Bluetooth?
Yes. The charger can be controlled via Bluetooth, and the first linking of the charger to
the APP must be made through Bluetooth. Once the initial connection is established,
you can choose to connect to a WiFi network through the APP.
Important Note on Bluetooth Connectivity: Before using Bluetooth to control the EV
charger, please ensure that the “Location” feature is enabled on your mobile device.
11. Can I control the EV Charger via Modbus RTU?
Modbus RTU is only available on A-E-B versions.
12. Can I control the EV Charger via Modbus TCP?
Modbus TCP is supported only for products with a LAN communication port, such as
the A-E-A and A-E-B versions. It is not available for products without a LAN port, such
as the L Series and A-E-2, which are not compatible with Modbus TCP.
13. Do FOX EV Chargers support phase switching?
Only Series A models in version E-A and E-B support 3-phase phase switching, allowing
the charger to switch to single-phase operation if three-phase power is insufficient to
start charging. Please check with your distributor to confirm if your specific EV charger
model supports this function.
14. Can the 22kW EV Charger be throttled down to 11kW?
Yes, the 22kW EV Charger can be throttled to 11kW using the APP by adjusting the current from 32A to 16A.
15. Are FOX EV Charger available for public or semi-public areas?
FOX provides different charger models designed for various applications. For example,the L Series chargers are intended for domestic use, while the A Series models are suitable for both domestic and semi-public areas. Please consult with your distributor to confirm the appropriate model for your specific needs before commissioning.
16. Does the EV Charger gen2 already have a MID installed?
Our domestic chargers do not include MID meters and are not MID certified.
17. Can the charger also be operated in IT networks and TT networks?
IT network: No (need to close the “ground faulty” in APP)
TT network: Yes
18. What is the recommended cable diameter for AC EV chargers?
We recommend using cables with a diameter of 4mm² or 6mm², up to a maximum of 10mm². The distance between the EV charger and the main power supply should not exceed 30 meters. Please ensure your installer selects the appropriate cable diameter based on the power requirements and the distance from the main power supply, while complying with local regulations.
19. What IP protection class does the EV Charger have?
| Model | Impact Protection | Ingress Protection |
|---|---|---|
| L Series | IP55 | IK08 |
| A Series (cable) | IP55 | IK08 |
| A Series (socket) | IP55 | IK08 |
20. How many chargers can be mounted on the mounting pole?
Our mounting pole can support up to 2 chargers (A series). Newer versions are compatible with both A and L series chargers. Please confirm with your supplier to ensure the mounting pole meets your specific requirements.
21. How does the EV Charger operate in Master/Slave mode, and how can I set it up?
The “Master/Slave” tethered mode is currently not supported. Instead, Multi-Unit Load Balancing is achieved by setting up a cloud based “Charging Station” via the FOX cloud platform. To configure this:
– Ensure all chargers are connected to the same WLAN network.
– Identify the chargers as part of the same “Charging Station” in the FOX Cloud App,which will handle load balancing across multiple units.
– Only one charger needs to be connected to a dedicated Smart Meter and identified as so.
Before commissioning a multi-unit project, consult with your installer or distributor to verify available power capacity and the number of units supported.
22. Can I use charging programs for multiple EV Chargers, such as “first come, first served”?
Our EV chargers do not differentiate between users. The available power will be distributed equally among all connected chargers.
23. Will my charger lock the plug during charging, or can I simply unplug it?
Yes, FOX EV chargers lock the plug during the charging session. To unplug, you must first end the charging session, after which the plug will be automatically unlocked. You can end the session by pressing the side button on the EV charger, using the Fox app, or through your vehicle by starting it after ending the charging session.
24. Is Fox-ESS working on a bidirectional charging solution?
Yes, FOX is actively investing in bidirectional charging technology. However, the implementation of bidirectional charging involves numerous external factors beyond the control of FOX and other EV charging manufacturers.
25. What is the warranty for FOX EV chargers, and how can I extend it?
FOX EV chargers come with a 3-year warranty. For information on extending the warranty, please contact your distributor or reseller.
