EN · 2018. 7. 12. · EN 21/52 ADVANTAGE TECHNOLOGY MPPT VS PWM (CONTINUE) MPPT GAIN A MPPT OVER PWM The voltage of a photovoltaic solar panel varies according to its temperature:

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www.uniteck.fr 19/52

Dear customers, thank you very much for purchasing one of our Uniteck products. Please read carefully and

thoroughly all the instructions before using the product.

DESCRIPTION

UNIMPPT is an advanced MPPT technology solar charge controller for autonomous photovoltaic system

for battery charging.

It accepts a solar photovoltaic panels system of maximum voltage 100V and maximum power as

follows:

Unimppt 100.40.24 S Unimppt 100.60.24 S

12V Batteries 600 W 1000 W

24V Batteries 1200 W 2000 W

Through its integrated microprocessor, one of the fatest microprocessor on the market, UNIMPPT

provides an optimal charging current (voltage/current) for your 12 or 24V battery based on:

- battery technology (Gel/Liquid/AGM)

- the battery state of charge (advanced charging algorithm ALGOTECK)

- ambient temperature which influences battery voltage (remote sensor in option)

UNIMPPT 100.40.24 S and 100.60.24 S are among the most efficient on the market (>98%).

Unimppt has automatic and electronic protection against Battery polarity reversal. This protection offers

the advantage of avoiding any manufacturer return out of warranty in the event of error as

required by products with internal fuse.

MPPT + ALGOTECK TECHNOLOGY

MPPT technology last generation combined with it’s at 6 steps new charging algorithm ALGOTECK in,

UNIMPPT has advantages below:

- Energy collection optimization relative to a PWM. UNIMPPT reconverts in charge intensity the unused differential voltage from panel/battery with a standard regulator (PWM). This technology difference results in 20% power gain of in the summer period and of 40% in winter sunny period when the voltage it’s at its maximum (no decrease in voltage due to the increase in temperature of the panel).

- Energy collection optimization of during cloudy periods. Light intensity changes quickly and UNIMPPT research in real time (refresh every 100 ms, among the fastest MPPT regulators on the market), the

point of power optimum of panel for more electricity production. This guarantees maximum power

under the most changing climatic conditions.

- Battery lifespan optimization. UNIMPPT constantly monitors the battery health status and charge status to calculate and to deliver every day the best charge curve for the battery (voltage level,

current level, pulse rate, temperature ...). UNIMPPT protects them from any stratification or

sulphating phenomenon and improves their service life. (Reconditioning and Life+ steps).

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20/52 www.uniteck.fr

ADVANTAGE MPPT TECHNOLOGY VS PWM

MPPT FUNCTION EXPLANATION

Unlike a standard PWM regulator which lowers voltage panel at voltage battery based on the thresholds of voltage define per his charge algorithm, a MPPT regulator (converter/regulator) uses all panels voltage and reconvert the excess of voltage panel/battery in charge intensity (cf. patterns below)

* Example with a MPPT efficiency of 98%

UNITECK MPPT ADVANTAGE

UNIMPPT research in real time (refresh every 100 ms, one of the fastest MPPT solar charge controller

among on the market), the optimum power point of panel, thus verifying if the voltage /intensity couple

has changed to modify its conversion parameters in input and thus to optimize the out power.

25V

20V

15V

1 2 3 4 5 6 7 8 9 10 A

Voltage = 18,7 V

Intensity = 5,43 A.

Generated power

100W

Voltage

➔ Intensty

PWM controller

V bat = 12,5 V

I bat = 5,43 AA

Output power

67 W

V bat = 12,5 V

I bat = 7,84 AA

Output power

98 W*

Voltage

Intensity

MPPT controller

Maximum power point tracking all the 100ms v

UNIMPPT thus ensures the power maximum even in changing weather conditions (cloudy sky).

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ADVANTAGE TECHNOLOGY MPPT VS PWM (CONTINUE)

MPPT GAIN A MPPT OVER PWM

The voltage of a photovoltaic solar panel varies according to its temperature: its voltage decreases when the temperature rises and vice versa. This standard value called temperature coefficient is given for a cell temperature of 25°C. Example: a panel that displays +/-0.34%/°C, therefore means that its Vmp voltage must be corrected by -0.34% per cell degree above 25°C. As shown in the example below, which highlights the voltage variations due to temperature and voltage drops due to the cable, a UNIMPPT charge controller allows a GPM (Average Production Gain) of 20% in summer and up to 40% in winter. We also note that the more the battery is discharged and/or the panel voltage is high, the greater the advantage of an MPPT over a PWM is.

100 W solar panel with UNIMPPT controller

Sunshine Winter

Solar Panel

temperature

Panel voltage Vmp

Voltage drop due to

the cables (5%)

Charging battery

voltage

Theorical gain in

value

Theorical gain in %

Gain rectified MPPT*

Sunrise 9h 5°C 20,0 19,0 12,2 6,8 56% 53% 19,9 18,9 12,5 6,4 51% 49% 19,8 18,8 13,0 5,8 45% 42% 12h 19,7 18,7 13,5 5,2 39% 37% 19,6 18,6 14,0 4,6 33% 31%

End of charge 16h 15°C 19,5 18,5 14,6 3,9 27% 26%

Mean + 40%

Sunshine Summer

Solar Panel

temperature

Panel voltage Vmp

Voltage drop due to

the cables (5%)

Charging battery

voltage

Theorical gain in

value

Theorical gain in %

Gain rectified MPPT*

Sunrise 7h 30°C 18,4 17,5 12,2 5,3 43% 41%

17,2 16,3 12,5 3,8 31% 29% 17,2 16,3 13,0 3,3 26% 24% 10h 16,6 15,8 13,5 2,3 17% 16% 16,3 15,5 14,0 1,5 11% 10%

End of charge 14h 70°C 16,0 15,2 14,6 0,6 4% 4%

Mean + 20%

* Example with a MPPT efficiency of 98%

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COMPATIBILITY PANEL

UNIMPPT is Buck Synchrone technology. It converts panel voltage in lower value voltage for the 12V or 24V battery. Generator powered on happens is if the PV voltage (Voc) exceeds the battery voltage more than +5V.

The charger will turn off when voltage PV (Voc) will be less than Vbat +1V.

Theoretical and actual power of a solar panel

The production data for solar panel are given according to Standard Test Conditions (STC): 1000W/m²

solar radiation, cell temperature at 25°C.

In summer in France, the panel temperature is quickly between 50 and 70°C and the solar radiation is 850W/m².

As the table below shows, in France, a 300 Wc peak panel will produce a maximum of 200W.

Panel Power

(STC Standard)

Real power rectified with temperature

(up to 15% decrease) *

Real power rectified at 850W solar radiation

(Up to 15% decrease) **

Power loss with wiring

(up to 5% decrease)

250 Wc 215 180 175 260 Wc 220 190 180 270 Wc 230 195 185 280 Wc 240 200 190 290 Wc 250 210 195 300 Wc 255 220 200

*Rectification temperature = 0,4%/ degree above 25°C either 10% increase for 70 °C (NOCT) ** Sunny rectification = CF explanation above

Winter Summer

Lille 300W/m² 700W/m²

Marseille 500W/m² 850W/m²

Solar radiation in France

1000W/m² (Standard)

800W/m²

8A

7A

6A

5A

4A

3A

2A

1A

500W/m²

250W/m²

10V 15V 20V 25V

15 % power in less

between normative

sunny and maximum

sunny in France

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PANEL COMPATIBILITY – UNIMPPT 100/40.24 S

With 12V battery

With 24V battery

1 panel

50W ► 300W

50W ► 300W

24V panel

+

2 panels

50W ► 300W (x2) series or parallel

50W ► 300W (x2) Series

+ +

3 panels

50W ► 200W (x3) parallel

50W ► 150W (x3) Series

50W ► 150W (x3)

series

200 W – 24V (x3) Parallel

+ + +

4 panels

50W ► 150W (x4)

series and parallel

50W ► 300W (x4) series and parallel

+ + +

+ +

6 panels



Series or parallel connection

Series

Parallel

Advantages Connection simplified

No power decrease when panel is shaded.

Disadvantages Power decrease if a panel is shaded

(tree, building, chimney, sail, ...) Use derivation connectors and larger

cable section

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PANEL COMPATIBILITY – UNIMPPT 100/60.24 S

With 12V battery

With 24V battery

1 panel

50W ► 300W

50W ► 300W

Panneaux 24V

+

2 panels

50W ► 300W (x2)

series or parallel

50W ► 300W (x2)

series

+ +

3 panels

50W ► 200W (x3)

parallel

50W ► 150W (x3)

series

50W ► 150W (x3)

series

200W – 24V (x3) parallel

+ + +

4 panels

50W ► 150W (x4)

series and parallel

50W ► 300W (x4)

series and parallel

+ +

+ +

6 panels

50W ► 150W (x6)

series and parallel

50W ► 300W (x6)

series and parallel

+ +

+ +

+ +

9 panels

50W ► 100W (x9)

series and parallel

50W ► 150W (x9)

series and parallel

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!

TECHNICAL ADVICES BEFORE CONNEXION

Before connection, please consult the following points:

BATTERY

UNIMPPT has an automatic voltage detection. For its correct functioning, please check:

- the battery voltage is higher than 6V (required voltage for the startup of the solar charge controller)

- For 24V batteries, the voltage cannot be lower than 18V.

For flooded batteries, check the electrolyte level. If necessary, complete before charging.

For coupling, proceed as follows: In series In Parallel In Series and in Parallel

PHOTOVOLTAIC PANELS

The maximum open circuit PV voltage of the panel(s) in series (Voc) must not exceed 100V.

Higher voltage may damage your regulator. Damage not covered by warranty. Its charging current is 40 or 60 A at 12V and 24V. If the input value is exceeded, UNIMPPT will limit its output power to this value without damaging the controller

Some advice For parallel connection, use diagonal wiring for load/discharge uniformity.

Do not pair batteries of different ages or

different technologies

With equal capacity prefer a high capacity battery, with 2 small connected in parallel.

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INSTALLATION - FIXATION

UNIMPPT has been designed for indoor use. It must be fixed on a suitable, solid, stable and dry flat surface. Use the Unmppt in a well-ventilated room, away from rain and dust. To ensure a good air circulation necessary for cooling, provide a free space of at least 15 cm around the product.

During use, the charge regulator may become hot, keep it away from flammable materials. Always mount the Unimppt regulator horizontally to ensure proper cooling. Never mount the product flat, as this will prevent cooling.

15 cm 15 cm

15 cm

15 cm

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FRONT AND SIDE FACE

3 Battery Technology Choice Indicator:

- AGM: sealed battery, maintenance-free, VRLA.

- Gel: gel electrolyte battery

- Liquid: Liquid electrolyte battery (with plug).

Control Button:

- Battery selection: press for 5 seconds

Battery connection - 2 M8 brass screws (supplied*)

PV connection - 2 M8 brass screws (supplied*)

6 Battery charge status indicators

UNISENSOR remote temperature sensor input (optional)

*For a better electrical connection, be sure to use the screws provided

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CONNECTION

For the connection of your solar charge controller, we advise you to be surrounded by qualified personnel in accordance with the regulations in force in your country.

We recommend the use of suitable isolated tools to avoid short circuits.

The tightening torque of the 4 M8 screws must be 20 Nm.

Connect each component to the symbols provided for this purpose (cables and round terminals not supplied).

Please follow the order of connection, observing the correct polarities. When disconnecting, please follow the reverse order. We recommend the use of a cable with a suitable fuse.

Connect your battery to the charge regulator (+ and-). All LEDs turn on and Test

LED lights up during 30 sec.

Connect your photovoltaic panel to the charge regulator (+ and -), and Test LED

lights up during 30 sec.

The maximum open circuit PV voltage of the panel(s) in series (Voc) must not exceed 100V.

Select your battery technology, your controller has 4 modes :

- Press and hold the button for 5 seconds, the active LED flashes

- Choose your battery and mode technology by pressing the button

AGM: Maintenance-free lead-acid battery, AGM. Gel: Gel Battery Liquid: Open lead acid battery Liquid with reconditioning: Open lead acid battery (see page 13)

- To confirm your selection, wait 5 seconds. The indicator becomes fixed again.

Unimppt saves your last configuration.

GROUNDING – INSTALLATION CLASS

The grounding of solar charge controller is not regularly necessary. If you want anyway achieve a

grounding, always do on the negative pole of the battery.

If the no-load voltage of your solar panels is higher than 75 V (throughout the temperature range of using), the whole solar system must be installed according to the class of protection II.

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FUNCTIONNING – CONTROL PANEL

OVERNIGHT DISPLAY

Flashing red

Deeply discharged battery, charge level 80

Red Battery discharged, charge level < 50%. Orange 50 and 70% charge level Green Charging level >70%

Blue Battery test every morning and evening

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ALGOTECK CHARGING CURVE

BATTERY CHARGING STEPS

Its ALGOTECK charging algorithm is unique on the market and consists of 6 steps.

1

TEST UNIMPPT determines the daily health and charge status of your battery

and sets the steps and charge levels necessary to maintain your battery.

2

BOOST CHARGE

(I)

UNIMPPT uses 100% of the energy from the solar panel, until the

voltage reaches the equalization voltage.

The battery is then 80% charged.

3

EQUALISATION (max. 4 heures)

UNIMPPT equalizes the charge on all battery cells (battery 100%

charged)

4

RECOND. Only in Recond Liquid mode, this weekly step makes it possible to mix,

thanks to a pulsed current, the electrolyte of your battery to avoid any

phenomenon of stratification or sulphation.

5

100% Battery charging is complete. UNIMPPT continues to deliver a very low

current to compensate for battery self-discharge.

6

LIFE+/STORAGE UNIMPPT compensates for the battery's natural self-discharge, with

periodic pulse charging for longer battery life.

Nb : the above voltage levels are adjusted by ALGOTECK conditions

Seuil de tension Gel AGM Liquid

Boost Absorption

14,2 V -

14,4 V 14,4V

14,5 V 14,5V

Egalisation - - 14,8V

Floating 13,9V 13,9V 13,9V

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ALGOTECK LOAD CURVE (CONTINUED)

REGULATION OF THE CHARGING CURVE ACCORDING TO BATTERY TECHNOLOGY

For perfect charging of all lead-acid batteries, Unimppt adapts its charging curve to the selected "battery

technology:

Liquid" Battery Mode:

Liquid electrolyte batteries require a higher charge to avoid stratification of the electrolyte. Stratification

is a non-homogeneous mixture of electrolyte. The acid is concentrated at the bottom and the water has

a lower density at the top. This can lead to freezing or oxidation of the plates. To avoid this

phenomenon, Unimppt carries out, in "Liquid" battery mode, an absorption charge which mixes the

electrolyte, essential to preserve the life of your battery. Equalisation charging is also possible.

Battery mode "AGM" / "GEL" Battery mode:

Waterproof batteries (AGM or GEL) require a precise control of the charge voltage to avoid bleeding

phenomenons. Bleeding is an electrochemical reaction that leads to the release of oxygen and hydrogen

gases inside the battery when the battery voltage reaches a point named "gasification voltage".

This voltage changes according to the type of the batteries (AGM or GEL). Depending on the selected

mode, Unimppt releases a voltage level adapted to the technology of your battery for a recharge up to

100%.

External temperature control

The chemical characteristics of the battery vary depending on the surrounding temperature. using its Unisensor remote temperature sensor, Unimppt precisely adapts its charging voltage to a reference temperature of 25°C, +/- 10mV (+/-30mV at 24V per °C), which avoids overcharging and undercharging your battery.

INTEGRATED PROTECTIONS

For safe use, UNIMPPT has many built-in protections that protect the regulator and battery:

- Reverse polarity protection and panel short circuits, - Battery polarity reversal protection (fuse),

- Thermal protection

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TECHNICAL SPECIFICATIONS

SYSTEME

Unimppt 100/40.24 S

Unimppt 100/60.24 S

Battery voltage 12/24V

Automatic detection

Nominal charging current 40 A 60 A

Maximum power at 40°C 500W in 12V / 1000W in 24V 750W in 12V / 1500W in 24V

Panel Compatible

- maximum power

- maximum voltage Voc

600W in 12V / 1200W in 24V

100V

1000W in 12V / 2000W in 24V

100V

Technology Advanced MPPT

Nominal efficiency 98%

Auto consumption 30 mA

Degree of Protection IP X1

IP 53

(Electrical connections)

(electronic parts)

Max cable cross-section De 10 mm² à 35 mm2 (connection by round terminals not supplied)

Max Altitude 2500 m

SOLAR CHARGE CONTROLLER

Voltage selection (12/24V) Adaptive with 6 steps

Battery type selection Yes (Gel, AGM, Liquid, Liquid with reconditration)

Recommended battery capacity 200 to 2 000 Ah

Temperature Compensation Yes (with Unisensor option)

-10mV /°C in 12V (25°C ref)

-20mV /°C in 24V (25°C ref)

Protection inversion de polarité Batterie

Electronique

MECHANICAL CHARACTERISTICS

Dimensions (LxHxP) 225 x 135 x 45 mm 225 x 135 x 45 mm

Weight 1,1 kg 1,5 kg

Operating temperature -20°C to + 60°C

Storage temperature -30°C to +80°C

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TROUBLESHOOTING, CAUSES, REMEDIES

Error message Causes Solution

No light switch on

The solar charge controller

needs the battery voltage to

be higher than 10V to be able

to start when connecting the

battery

Check the battery voltage,

recharge it if necessary.

Battery polarity reversal

Check the connections. Battery connection problem

(cables, terminals...)

Defective battery

Replace your battery,

following the order of

disconnection and connection

(see installation and

connection section).

Test light illuminated green, yellow or

red during the day

Solar panel disconnected, not

properly connected, or short

circuit

Check the connections

(polarity and connection).

Normal functionning: The panel voltage is lower than the battery voltage or too low sunshine.

The panel will resume charging as soon as the panel voltage exceeds the battery voltage.

One or several cells of your

panel are hidden.

Check the cleanliness of your

solar panel and make sure

none of the cells are hidden.

Orange or red charge indicator

Battery discharged

Usual charge, light goes

green as soon as the battery

is charged.

High voltage alarm in your vehicle,

boat,

Battery deeply discharged. Setting your alarm

Using Liquid Recond Mode Set your product to Liquid

mode (without Recond)

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WARNINGS AND PIECES OF ADVICE

• UNIMPPT is designed to be exclusively used with photovoltaic systems and lead acid batteries with liquid electrolyte, gel cell (Gel), sealed AGM types.

• Under no circumstances should you attempt to charge other batteries than acid-lead batteries (non-rechargeable batteries for example).

• Use UNIMPPT in a well-ventilated area, sheltered from rain, humidity, dust and condensation.

• Follow manufacturer’s instructions and safety procedures of the battery. In case of doubt, consult

your retailer or installer.

• Batteries can produce flammable gas. Avoid flames, sparks.

• During battery maintenance (except GEL), there is a risk of acid leaks so protect yourself.

• Never short circuit + and - of the battery or cables: risk of explosion or fire.

• Maintenance : check the wiring and all connections at least once a year.

• All tasks must be realised in compliance with the country regulations in force regarding electricity.

• The device used in your installation such connectors, cables, fuse, disconnectors, … must be adapted and in conformity with law and regulations in force in the country for application regarded.

• This device is not designed to be used by people (including children) whose physical, sensory or

mental abilities are reduced, nor by people lacking of experience or knowledge unless they have

benefited of supervision or prior instructions concerning the use of the device given by a person

responsible for their safety.

• Please keep an eye on children to ensure that they do not play with the device

PICTOGRAMS

Device conform to applicable

European Union directives

For indoor use, do not expose to the rain

Caution! Before using, read the

instruction manual utilization.

Caution explosive gases, avoid sparking and

naked flames.

Product under selective

collection- Do not throw it in a

household waste.

Choose a sheltered local with adequate

ventilation or especially equipped

IP51

Protected against dust and vertical drops of water.

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COMPLIANCE STATEMENT

UNITECK testifies that the solar charge controllers described in this manual:

UNIMPPT 100/40.24 S et 100/60.24S S are manufactured in compliance with the following European directives:

- Low voltage directive: 2014/35/UE du 26/02/2014.

- EMC directive: 2014/30/UE du 26/02/2014.

- ROHS Directive: 2011/65/UE du 08/06/2011

It complies to the harmonised standards:

- Low voltage : EN 60335-1 : 2013 / EN 60335-2-29 : 2004

- Regulatory standard: EN 62509

- CEM : EN 55014-1 : 2007 / EN 5514-2 : 1997 / EN 61000-3-2 : 2006 / EN 61000-3-3 : 2014

EN 62233 : 2008

- ROHS : EN 50571 : 2013

Date of CE marking: janvier 2018.

01/01/2018 Yoann Fourmond

Uniteck- 8 Avenue de Rome Directeur Général Immeuble le Cassis

34350 Vendres -France

WARRANTY

The warranty covers any defect or manufacturing defect for 1 year from the date of purchase (parts and labor).

The warranty does not cover:

- normal wear and tear of parts (e.g. cables, etc.)

- panel-module/battery voltage errors, incidents due to inappropriate uses, fall, disassembly or any

damages due to transport.

In case of failure, return the device to your distributor by attaching:

- the dated proof of purchase (receipt, bill…)

- explanatory note of the failure.

Attention: our after-sales service does not accept returns postage due or any additional transport costs.

After the warranty, our after-sales service ensures repairs after acceptance of a quotation.

Contact SAV :

Uniteck- 8 Avenue de Rome Immeuble le Cassis

34350 Vendres -France

France mail:

[email protected]

Fax: +33 (0)4 88 04 72 20
mailto:[email protected]

Documents

EN · 2018. 7. 12. · EN 21/52 ADVANTAGE TECHNOLOGY MPPT VS PWM (CONTINUE) MPPT GAIN A MPPT OVER PWM The voltage of a photovoltaic solar panel varies according to its temperature: