How to Use the FoxCloud Solar App: A Simple Homeowner’s Guide

If you’ve just had a Fox ESS solar system installed, the FoxCloud app can feel a bit overwhelming at first. There are power-flow diagrams, battery percentages, energy graphs, tariffs, work modes, and settings that sound technical even when the app itself looks clean.

The good news is that you do not need to be a solar expert to use it well.

This guide explains the main FoxCloud 2.0 screens in plain English, what each one means, what to look out for, and which settings you should change carefully. It is based on Fox ESS’s official FoxCloud 2.0 user manual and support documentation.  

What is the FoxCloud app?

FoxCloud 2.0 is Fox ESS’s mobile app for monitoring and managing your solar system remotely. Fox says it lets you view real-time system status, power flow, production, consumption, revenue, weather, device information, and certain settings depending on your equipment and user role.  

In simple terms, it is your solar dashboard.

It helps you answer questions like:

• Are my panels producing power right now?
  
• Is my battery charging or discharging?
  
• How much electricity is my home using?
  
• Am I importing from the grid or exporting to it?
  
• Are there any faults or warnings?
  
• Is my system set to the right battery mode?
  

Before you start: a very important note

Fox’s own manual says that local physical settings take precedence over app settings, and that remote app control should not be treated as proof that the system is electrically safe to work on. In other words, the app is for monitoring and control, but not for confirming electrical isolation or safety.

For most homeowners, that simply means: use the app for normal monitoring and everyday settings, but leave electrical work and installer-level changes to a professional.

The main tabs in FoxCloud

FoxCloud 2.0 is built around a few core areas:

• Overview
• Plant
  
• Device
• Service
  
• Me  

Not every home system will show every feature, because Fox notes that displayed information varies by device type, plant type, region, and user role.  

1) The Plant screen: your main home screen

Fox says the Plant tab is the main view for end users and shows real-time system status, a power flow diagram, production and consumption figures, revenue, and weather.  

This is the screen most homeowners will use most often.

What the power-flow diagram means

The power-flow diagram is the picture showing your home, solar, battery, and grid. Fox explains that the arrows show the direction of energy movement between devices. If your system includes a meter, the app can also show consumption and feed-in information.  

How to read it in plain English

Think of it like this:

• Solar to house means your panels are powering your home directly.
  
• Solar to battery means you are storing spare solar energy.
  
• Solar to grid means you are exporting extra electricity.
  
• Battery to house means your battery is helping power the home.
  
• Grid to house means you are buying electricity.
  
• Grid to battery may happen in some battery modes or schedules.  

What to look out for

A healthy daytime pattern often looks like this:

• Morning: solar starts rising
  
• Midday: solar covers the house and may charge the battery
  
• Afternoon: battery may fill up
  
• Evening: solar drops and battery begins to support the home
  
• Overnight: battery may discharge until it reaches its minimum allowed state of charge, then the home imports from the grid

If you see strong sunshine but no solar production, or the power flow looks obviously wrong, there could be a communications issue, a device fault, or sometimes a meter/CT configuration problem. Fox includes a Meter Check function partly for this reason.  

2) Today Production, Today Consumption, and energy totals

Fox says you can tap Today Production or Today Consumption on the Plant screen to enter the Analysis section, where the app shows PV production, load consumption, and other energy data across different time periods.  

What these numbers mean

• Today Production = how much electricity your solar panels have generated today
  
• Today Consumption = how much electricity your home has used today
  

If you have a battery and meter, you may also see imports, exports, charge/discharge, and more detailed breakdowns depending on the system.  

A simple way to interpret them

Do not expect your production and consumption to match exactly.

For example:

• Solar production might be 18 kWh today
  
• Your house might use 24 kWh today
  
• The difference could be supplied by the battery or the grid

What matters is the pattern over time:

• Is solar doing most of the work in the daytime?
  
• Is the battery helping in the evening?
  
• Are you importing more than expected?

3) Total Revenue: useful, but only if tariffs are set correctly

Fox says the Total Revenue section estimates the financial performance of the plant based on a configured tariff plan. You can reach tariff settings either from Plant > Total Revenue > Tariff or through Me > System Settings > Tariff.  

Important warning

If your tariff is wrong, your money figures will also be wrong.

The app can only estimate savings or earnings properly if the buy and sell electricity rates are entered correctly. Fox allows either:

• a Manual tariff, where you enter peak, off-peak, and mid-peak buy/sell prices yourself, or
  
• a Smart tariff, where available, using supported tariff providers. Fox says Smart Tariff is currently available in the Netherlands, Belgium, and the UK.  

For most homeowners in Portugal or Spain

You will usually want to use a manual tariff unless local smart tariff support is confirmed for your region.  

What to look out for

Check:

• your import rate
  
• your export rate
  
• whether the times of day are correct
  
• whether VAT, fixed charges, or network charges are included or excluded consistently

A common mistake is treating the Fox revenue screen as an exact utility-bill calculator. It is better treated as an estimate unless it has been set up very carefully.

4) Quick Settings: the most important screen for battery owners

Fox says Quick Settings allows fast adjustment of key battery and system parameters. These can include:

• System Min. SOC
  
• System Max. SOC
  
• Backup Cut-off SOC
  
• Battery Warmup
  
• Smart Load Control
  
• Import Limit
  
• Export Limit  

Fox also notes that available options vary by role, region, and device.  

What these settings mean in normal language

System Min. SOC

This is the lowest battery percentage the system will discharge down to during normal grid-connected operation. Fox says discharging stops once SOC reaches this value.  

Example:

If you set this to 20%, the battery should stop discharging at around 20% and keep that energy in reserve.

System Max. SOC

This is the highest level the battery will charge to during grid-connected operation. Fox says charging stops once the SOC reaches this set value.  

In many homes this stays at or near 100%, unless there is a special reason not to.

Backup Cut-off SOC

This controls discharge stopping in off-grid operation. Fox says it stops discharging once SOC reaches the set value during off-grid operation.  

This matters more for backup systems and should usually be set thoughtfully rather than casually.

Import Limit

Fox says this sets the maximum power allowed to be drawn from the grid.  

Export Limit

Fox says this sets the maximum power allowed to be fed into the grid.  

This can matter where export is capped by the installer, DNO, or utility rules.

What homeowners should and should not change

Usually safe to review:

• tariff settings
  
• basic work mode
  
• notifications
  
• viewing data and analysis
  

Change carefully:

• minimum battery reserve
  
• import/export limits
  
• anything related to backup operation
  
• scheduled charging/discharging

If you are not sure, ask your installer before changing anything in Quick Settings that affects battery behavior.

5) Work Mode: how your battery behaves

Fox says the app’s Work Mode section lets users choose how the plant behaves depending on energy needs, priorities, and tariffs.  

This is one of the most important parts of the app for systems with batteries.

Self-use mode

Fox says Self-use mode maximises use of PV output and battery energy to power the home, minimising grid consumption. When solar is sufficient, solar powers the load first, then charges the battery, and any extra goes to the grid. If solar is insufficient, the battery supports the load, and then the grid makes up any shortfall.  

Best for: most homeowners who want to use as much of their own solar as possible.

Feed-in Priority mode

Fox says Feed-in Priority prioritises electricity sales. Solar powers the load first, and excess goes to the grid. If feed-in limits are reached, the energy is stored in the battery.  

Best for: homes where export payments are especially attractive.

Less common: for homeowners whose goal is mainly self-consumption.

Backup mode

Fox says in Back Up mode, the battery charges at maximum power until reaching the backup SOC, and battery discharging is not allowed. If solar cannot meet the backup demand, the system can purchase energy from the grid to charge the battery.  

Best for: people preparing for outages or preserving battery energy for resilience.

Watch out: this mode may increase grid imports because the battery is being preserved rather than used freely.

Peak Shaving mode

Fox says Peak Shaving works by setting an import limit and threshold SOC. Above the threshold SOC, the system behaves like self-use. Below that threshold, the battery only helps when home demand exceeds the import limit.  

Best for: larger homes or commercial-style usage where reducing demand peaks matters.

For many households: this is more advanced than necessary.

Mode Scheduler

Fox says Mode Scheduler lets you automate work modes by time period. It also adds:

Forced Charge: battery charges from both PV and grid
Forced Discharge: PV and battery supply loads and can export energy  

Fox also warns that when Mode Scheduler is enabled, battery settings cannot be changed in Quick Settings until you switch back to a basic work mode.  

Best for: advanced users on time-of-use tariffs.

Watch out: this is one of the easiest places to create unexpected behavior if you do not fully understand the schedule.

AI Mode

AI Mode automatically optimises charging and discharging based on usage patterns, weather forecasts, and tariffs, but it is currently available in the Netherlands and support for other regions is still on the roadmap.  

For most Sol Viva customers in Portugal, this is not currently relevant but when it comes on-line together with smart tarrifs, this will be a game changer for your home.  You can read more about smart tariffs in a future blog post.

6) Device screen: checking inverter, battery, charger, and accessories

Fox says the Device screen shows all devices in the selected plant, grouped by type such as inverter and battery, with each device card showing the device name, status, and current operating state.  

Why this matters

This is where you go when you want to answer:

• Is the inverter online?
  
• Is the battery connected properly?
  
• Is the EV charger visible?
  
• Is anything showing standby, fault, or offline?

What to look for

Healthy systems usually show devices as online and operating normally.

Things to investigate:

• device offline
  
• fault or warning indicators
  
• communications gaps
  
• missing accessories such as a meter or charger that should be there

7) Analysis Graph: where the useful trends live

Fox says that from a device details screen you can open the Analysis graph, expand the curve view, zoom out, and choose which parameters to display.  

This is one of the best features in the app.

What to use it for

Use the graphs to spot:

• whether solar is peaking when expected
  
• whether battery charging starts too late or too early
  
• whether the battery empties overnight
  
• whether grid imports are happening during sunny hours
  
• whether export spikes look normal

What a “good” graph often looks like

On a sunny day:

• solar rises in the morning
  
• load goes up and down through the day
  
• battery charges around midday
  
• battery discharges after sunset
  
• grid imports stay low until battery reaches its minimum reserve

If the graph shows heavy grid import while the battery is full or solar is strong, your work mode or settings may need attention.

8) EV charger settings in FoxCloud

Fox says EV charger settings are managed inside FoxCloud 2.0. You can access the charger either from the Plant screen by tapping the charger icon, or from the Device screen by selecting the charger.  

Charger control modes

Fox says the charger supports:

• Controlled: charging start/stop via the app or RFID card
  
• Plug & Play: charging starts when the cable is plugged in
  
• Locked: charging disabled  

PV Linkage

Fox says the charger can also be set to:

• Green Mode: solar-only charging
  
• Economic Mode: solar-priority with grid backup  

Fox’s manual also explains the charging logic, including a 6A to 32A charging-current range and the conditions under which solar surplus starts or pauses charging.  

For most homeowners, the simple interpretation is:

• Green Mode = use solar only, but charging may pause if solar is too low
  
• Economic Mode = use as much solar as possible, but top up from the grid when needed

9) Meter Check: useful when the app seems “wrong”

Fox says Meter Check is designed to verify CT installation and measurement accuracy, especially where incorrect phase sequence or reversed CT orientation can lead to inaccurate power-flow diagrams and data.  

This is more of an installer tool than a homeowner tool, but it matters because:

If your app says you are importing when you think you should be exporting, or if household load numbers look nonsensical, a CT or meter issue may be the cause.

10) Firmware updates

Fox says FoxCloud 2.0 supports remote firmware upgrades. To check, go to the relevant device, open its details, tap the device serial number, and review the version section. A red dot means new firmware is available. Fox also notes that app-based firmware upgrade support is currently limited and more devices will be supported later.  

Homeowner advice

Do not rush firmware updates unless:

• your installer recommends it
  
• a known issue is being fixed
  
• you understand what device is being updated

For many customers, it is sensible to ask the installer to manage this.

11) Faults, alarms, and notifications

Fox says the Faults section lists alarms from all plants under the account, split into:

• Current for active alarms
  
• History for past alarms  

What to do if you see an alarm

Do not panic. Some alarms are temporary communications issues. Others may be more important.

A good order of checks is:

• See whether the system is still producing normally
  
• Check whether the alarm is current or historical
  
• Take a screenshot
  
• Contact your installer if the issue persists or affects performance

Fox also says notifications can be enabled or disabled in Me > System Settings.  

12) The Me screen: account and app settings

Fox says the Me section is your personal account center. From here, you can manage your profile and account settings. System Settings includes things like:

• default app language
  
• multi-device login
  
• account deletion
  
• tariff plan access for end users
  
• enabling or disabling Fox Forest
  
• enabling or disabling notifications  

For most homeowners, this is where you manage the app itself rather than the solar hardware.

Common mistakes homeowners make in FoxCloud

1. Reading power and energy as the same thing

Power is the “right now” number, usually in kW.

Energy is the “over time” number, usually in kWh.

If your app says 3.5 kW solar, that is the current production rate.

If it says 18 kWh today, that is the total produced so far today.

2. Chasing every small fluctuation

Solar systems naturally move up and down with clouds, appliances, EV charging, kettles, ovens, and heat pumps. Small changes are normal.

3. Changing work modes without understanding them

Self-use, backup, scheduler, and peak shaving can all produce very different outcomes. The system may not be “wrong”; it may simply be doing exactly what you told it to do.

4. Trusting the revenue screen before tariffs are set

If buy/sell prices or time periods are wrong, the savings figures will be misleading.  

5. Assuming the app can replace installer support

The app is powerful, but commissioning, CT orientation, export limitations, backup design, and advanced battery strategy still need proper setup. Fox’s own documentation makes clear that some settings and visibility depend on role, region, and device.  

Best settings for most homeowners

Every home is different, but for many households with solar and battery storage, a sensible starting point is:

Work Mode: Self-use
System Min. SOC: keep a modest reserve rather than fully emptying the battery every night
Tariff: set correctly and review occasionally
Notifications: enabled
Mode Scheduler: only if you are on a time-of-use tariff and know exactly why you are using it

When to call your installer

You should contact your installer if:

• the inverter or battery keeps showing offline
  
• power flow obviously looks wrong
  
• solar production seems abnormally low
  
• the battery does not charge or discharge as expected
  
• you see repeated active faults
  
• you want to change advanced work modes or export/import limitations
  
• you suspect the CT or meter is reading incorrectly

Final Thoughts

FoxCloud is a very capable app, but the trick is knowing which parts matter day to day.

For most homeowners, the key things to watch are:

• solar production
  
• battery percentage
  
• whether the house is importing or exporting
  
• whether your work mode matches your goal
  
• whether tariffs are set correctly

Once those basics are understood, the app becomes much easier to use and much more valuable.

If you have a Fox ESS system and want help checking that your settings are right, Sol Viva can review your system setup, explain your graphs, and help you get the most value from your solar and battery system.