This is typical for electronic measuring instruments. The smallest value that can be displayed (here 0.1 A) may fluctuate.

This terminal must be connected to the negative terminal of the battery (see instruction manual or printing at the back-side of the FOX-D1).

No !
The FOX regulator is designed as a series regulator and once the batteries are nearly fully charged the regulator cutts of the connection between the solar module and the battery in fast alternation. When the batteries are charged now, the wind generator would operate without load. Accordingly the wind generator could be damaged due to dramatically increased rotational speed and very high voltage up to 100 V. The charge regulator could be damaged as well.
Hence wind generators need a special charge regulator that suits their technical specifications.

Yes, this is possible without any problems.

120 Wp nominal power do correspond to a charging current of approx. 8 A. According to this the capacity of the batteries should be between 80 Ah and 400 Ah. Please consider that a larger capacity of battery causes an extension of the battery life as it reduces the permanent charging/discharging cycles.

The regulator charges the batteries with a 3 step charging characteristic. When the star is shown, the battery is completely charged and the algorithm has achieved step 3. Now the battery will be charged up to 13.8 V to protect it from long term gassing.

The display never shows 0.0 A. Provided that the load current is below 0.5 A correspondingly the display shows the following: " ILoad < 0.5 A "
The measurement range is from 0.0 up to 16 A. According to the resolution of the FOX regulators it is difficult to measure any current below 0.5 A. To avoid the situation that a small load is switched on e.g. a radio (0.1A) and the display shows 0.0 A, the FOX regulators have been programmed in that way that if the current is less than 0.5A, the above message will be shown on the display.

At solarpower you have generally 17V / 34 V voltage.
Example: FOX -350/E → 260W / 17V = 15,3A
520W / 34V = 15,3A
It results a max. current of 16A for this regulator.

No! You can only load batteries of the same voltage with one charge regulator.

One reason could be that no battery (or one with a voltage below 8V) is connected to terminal B1 of the regulator or the pins are inverted. The internal fuse of the regulator could also be destroyed.

Check connections, all three terminals must be connected (see instruction manual or printing at the back-side of the FOX-D1).

At 12V systems the bulk charging voltage at the default AGM setting is 14,2V while the float is 13,8V, at GEL it is 14,3V/13,8V and at Flooded it is 14,4V/13,8V. All charging voltages are temperature compensated with -20mV/K (@ 12V) (s. Datasheet).
At 24V systems the bulk charging voltage at the default AGM setting is 28,4V while the float is 27,6V, at GEL it is 28,6V/27,6V and at Flooded it is 28,8V/27,6V. All charging voltages are temperature compensated with -40mV/K (@ 24V) (s. Datasheet).

The FOX-220 has an optimized (adjustable in conjunction with the FOX-MD1) charging algorithm in which you can set the type of batteries you want to use.

The ambient temperature should not be higher than 50°C.

If modules are connected in series to the charge regulator the voltages of each are added (12V + 12V = 24V). So with two modules of 12V each you can also load a 24V battery.

If the modules are connected in parallel (combine all plus-poles and combine all minus-poles) to the charge regulator, the voltage of each module has to be equal. Both connections can also be combined (24V module parallel to 2x 12V module in series = 24V at the charge regulator).

Generally it is possible to charge 12V batteries with a 24V solar module, but the charge power is reduced to almost 50% of nominal charge power. The charge regulators recognize the 12V battery and tune the charge power.

Because lithium-ion systems are constructed very manufacturer-specificly, a manufacturer's surveyor should certify the combination of our modules and the li-ion system.

The following is only be suitable with FOX-Regulators from SunWare!

At night a very low measurement current (~0,01mA) is required to detect whether the battery voltage is higher than the module's voltage (night operation).

No! In a series connection the current of the more powerful module has to go through the less powerful one. That may cause an overload! So series connection only works with two identical (identical current) solar modules.

Check connections, all three terminals must be connected (see instruction manual or printing at the back-side of the FOX-D1).

The yellow LED is an indicator for the charging current. If there is no charging current, the yellow LED is off. When there is a charging current and the battery is not yet fully charged, the LED is permanently on. When the battery is nearly fully charged, the regulator reduces the charging current and the LED starts to flash.

The standard FOX-100 is for use in 12V systems only. But certainly we can deliver special 24V versions on demand.

FOX-200 and FOX-300 prevent the battery of deep discharge. When the battery is empty, the load that is connected to the load-terminals will be turned off and the red LED will be on. As soon as the voltage of the battery is back on a normal level the load will be turned on and the red LED will be off.

The display only shows this message when battery 2 is connected to FOX-350. In case that there is no second battery connected to FOX-350, the option of choosing between battery 1 and battery 2 does not exist accordingly.

Yes, this is allowed. The regulator only operates the positive pole, the negative pole is internally connected to the negative pole of the battery.Thus the positive pole of the load can be connected to the regulator and its negative pole can be connected directly to the negative pole of the battery.

FOX-300 and FOX-350 are suitable for lead/acid batteries as well as for gel batteries. Thus it is no problem to connect two different types of batteries.

To operate perfectly, the charge regulator definitely has to be connected to a battery at terminal B1. In case that there is not any battery connected none statement of the functioning of the regulator can be inferred.

Very rarely illegible signs appear at the display. But this appearance lasts at max. 20 sec. Subsequently the information at the display refreshes. By pressing the “ESC” button the display will be refreshed as well.

In case that the display fails and does not clear we recommend to RESET the regulator. For this purpose please disconnect the positive pole of the solar modules and remove both yellow fuses. Wait 1 min. and leave the regulator without any voltage. Afterwards replace both fuses and reconnect the positive pole of the module.

Inside the regulator, the terminals and the negative pole of the battery are directly connected among each other. We absolutely recommend not to connect anything else but only a battery at terminal B2. Otherwise the charge regulator can be damaged!

Please be sure that the negative pole of the solarmodules is not connected to the negative battery pole (chassis or ground) in any way as this short circuits the regulator.

IL = the current flowing from the battery to the consumer (current load).
IS = is the current from solar modules into the battery - the charging current.
B1 = the current battery voltage of battery 1
B2 = the current battery voltage of battery 2