Epever XTRA-N Series User manual

XTRA-N series

- MPPT Solar controller

User manual

Models:

XTRA1210N/XTRA2210N

XTRA3210N/XTRA4210N

XTRA3415N/XTRA4415N

Important safety instructions

Store the manual carefully for future reference.

This manual contains all safety, installation and operating instructions for the Maximum

Power Point Tracking (MPPT) controller in the XTRA N Series (referred to in this manual as

"controller").

General safety information

➢Read all instructions and warnings in this manual carefully before installation.

➢There is no component inside the controller that can be serviced by the

user. DO NOT use the controller or attempt to repair it.

➢Install the controller indoors. Do not expose the controller to the elements

and prevent water from entering the controller.

➢Install the controller in a well-ventilated area. The controller heatsink can

get very hot during operation.

➢We recommend installing suitable external fuses/circuit breakers.

➢Make sure all PV panels and battery fuses/disconnects are disconnected

before installing and adjusting the controller.

➢All cables must be tightly connected to prevent excessive heating of

loose connections.

1. General information

1.1 Overview

The XTRA-N series comes with a new design philosophy. The new charging power

and current limiting function automatically ensures stability when working with

oversized PV modules and when operating at higher temperatures. At the same time,

it is water- and dust-resistant thanks to the IP32 protection rating and adds a

professional protection chip for the communication port to further improve the

controller's reliability and meet various application requirements.

By further optimizing the MPPT control algorithm, the XTRA N series can minimize

the loss of the maximum power point, quickly track the maximum power point of the

PV system, and extract the maximum amount of energy from the solar modules

under any conditions. Furthermore, it can increase the energy utilization ratio of the

solar system by 10%-30% compared to the PWM charging method.

The XTRA N series has a three-stage charging algorithm based on a digital control

circuit, which can effectively extend battery life and greatly improve system

performance. It also has comprehensive electronic protection against overcharging,

over-discharging, or over-discharging of batteries, etc., which ensures that the solar

system will be more reliable and durable. This series of controllers can be widely

used for RV, communication base stations, home systems, monitoring and many

other fields.

Features:

•LCD display unit XDS2

•Full-load operation with no drop in capacity over the operating temperature range

•Dustproof and waterproof design thanks to IP32 protection rating★

•Internationally recognized ST and IR brand components are used to ensure good

product life due to their high quality and low defect rate

•The communication port uses a professional protection chip that can provide 5V

DC power and has over-current and short circuit protection.

•Advanced Maximum Power Point Tracking Technology (MPPT) with at least

99.5% efficiency.

•Very high tracking speed and guaranteed tracking efficiency.

•Advanced MPPT control algorithm to minimize maximum power point loss and

lost time

•High quality components, improving system performance with maximum

efficiency up to 98%.

•Accurate detection and monitoring of MPPT performance

•Automatic limitation of charging power and current

•Wide operating voltage range of MPP.

•Compatible with lead acid and lithium batteries

•Battery temperature compensation function

•Real-time energy statistics function.

•Automatic power reduction function in case of excessive overheating

•Possibility of different modes for load

•RS-485 communication interface with Modbus protocol

•Monitoring and parameter setting via mobile phone or PC app

•Comprehensive electronic protection

★3-Dustproof: can prevent the ingress of solid foreign objects with diameter larger

than 2.5mm;

2-Waterproof: when tilted to 15 degrees, it can still prevent water droplets from

entering.

1.2 Characteristics

Figure 1 Product characteristics

❶

RTS

★

port

❺

RS485 port

❷

PV clamps

❻

Clamp cover

❸

Battery clamps

❼

Imaging unit

❹

Load clamps

❽

Mounting hole size Φ5

★If the temperature sensor is short-circuited or damaged, the controller will

charge or discharge at the default temperature setting of 25°C.

2. Installation instructions

2.1 General installation notes

Read the entire installation instructions before installation to familiarize yourself

with the installation steps.

Use extreme caution when installing batteries, especially acid-filled lead-acid

batteries. Wear eye protection and have fresh water available for rinsing and

washing in case of contact with battery acid.

Keep the battery out of reach of metal objects that could cause it to short out.

Explosive gases may be emitted from the battery during charging, so

ensure proper ventilation during charging.

If the installation is in a housing, we strongly recommend that ventilation is

provided. Never install the controller in a sealed housing with flooded batteries!

Battery vapors can etch and destroy the controller's circuitry.

Loose power connections and corroded cables can result in higher temperatures

that can melt wire insulation, burn surrounding materials, or even cause a fire.

Ensure tight connections and use cable clamps to secure cables and prevent them

from swaying in mobile applications.

The controller can operate with a lead acid battery and a lithium battery within its

control range.

Battery connections can be wired to a single battery or a set of batteries. The

following instructions refer to a single battery, but it is assumed that the battery

connection can be made to either a single battery or a set of batteries.

Multiple identical controller models can be installed in parallel to the same set of

batteries to achieve higher charging current. Each controller must have its own solar

module(s).

Select the correct cable cross section according to the current density of 5A/mm2.

2.2 PV system requirements

(1) Serial connection (series) of PV modules

As a basic part of a PV system, the controller can be suitable for different types of PV

modules and can thus maximize the conversion of solar energy into electricity.

According to the open circuit voltage (Voc) and the maximum voltage point (VMpp) of

the MPPT controller, the combination of different types of PV modules can be

calculated. The table below is for information only.

XTRA1210/2210/3210/4210N - max voltage of Voc PV module 100V:

System

voltage

36 articles

Voc＜23V

48 articles

Voc＜31V

54 articles

Voc＜34V

60 articles

Voc＜38V

Max.

Best

Max.

Best

Max.

Best

12V

24V

System

voltage

72 articles Voc

＜

46 V

96 cells Voc＜62 V

Voc＞80 V thin

film module

Max.

Best

Shi

Max.

Best

12V

24V

XTRA3415/4415N - max voltage Voc of photovoltaic module 150V:

System

voltage

36 articles

Voc＜23 V

48 articles

Voc＜31 V

54 articles

Voc＜34 V

60 articles

Voc＜38 V

MAX.

Best

MAX.

Best

MAX.

Best

MAX.

Best

12 V

24 V

48 V

System

voltage

72 cells Voc＜46 V

96 cells Voc＜62 V

Module with

thin film

Voc＞80 V

MAX.

Best

MAX.

Best

12 V

24 V

48 V

NOTE: The above parameter values are calculated according to standard test

conditions (STC): irradiance 1000 W/m2, module temperature 25℃, air mass 1.5.

(2) Max. power of PV system

The MPPT controller has a current/power limiting function, that is, during the charging

process, when the charging current or power exceeds the rated charging current or

power, the controller will automatically limit the charging current or power to the rated

charging current or power, which can effectively protect the charging parts of the

controller and prevent the controller from being damaged due to the connection of

some PV modules with overspecification. The actual function of the PV system is as

follows:

Condition 1:

actual charging power of the PV system ≤ nominal charging power of the controller

Condition 2:

actual charging current of the PV system ≤ nominal charging current of the controller

When the controller operates under "Condition 1" or "Condition 2", it will perform

charging according to the actual current or power; at this time, the controller can

operate at the maximum power point of the PV system.

WARNING: If the PV output is not greater than the rated charging power,

but the maximum voltage across the PV array disconnected circuit is

greater than 100V(XTRA **10N) or 150V(XTRA **15N) (at the lowest

ambient temperature), damage to the controller may occur.

Condition 3:

actual power of PV system ＞nominal charging power of controller

Condition 4:

actual charging current of the PV system ＞nominal charging current of the controller

When the controller operates under "Condition 3" or "Condition 4", it will perform

charging according to the actual current or power.

WARNING: If the PV output is higher than the rated charging power but

the maximum voltage across the PV array disconnected circuit is higher

than 100V(XTRA **10N) or 150V(XTRA **15N) (at the lowest ambient

temperature), damage to the controller may occur.

According to the "peak sunshine clock diagram", if the output of the PV system

exceeds the rated charging power of the controller, the charging time is extended

according to the rated power so that more energy can be obtained to charge the

battery. In practice, however, the maximum output of the PV array must not exceed

1.5 times the rated charging power of the controller. If the maximum power of the PV

array exceeds too much of the rated charging power of the controller, it will not only

cause destruction of the PV modules, but also increase the voltage of the PV array

disconnected circuit due to the effect of ambient temperature, which may cause a

higher probability of damage to the controller. Therefore, it is very important to

configure the system appropriately. The recommended maximum PV system output

for this controller can be found in the following table

Model

Rated

charging

current

Rated

charging

performan

Max. power of

PV system

Max. voltage

of PV open

Circuit

XTRA1210N

10A

130 W/12 V

260W/24V

195W/12V

390W/24V

①

92V

②

100V

XTRA2210N

20A

260W/12V

520W/24V

390W/12V

780W/24V

XTRA3210N

30A

390W/12V

780W/24V

580W/12V

1170W/24V

XTRA4210N

40A

520W/12V

1040W/24V

780W/12V

1560W/24V

XTRA3415N

30A

390W/12V

780W/24V

580W/12V

1170W/24V

150 V①

XTRA4415N

40A

520W/12V

1040W/24V

2080W/48V

780W/12V

1560W/24V

3120W/48V

138 V②

①At ambient temperature 25℃

②At minimum ambient operating temperature

2.3 Wire size

Wiring and installation shall meet current applicable electrical standards.

➢PV wire size

As the PV system performance may vary due to PV module size, connection method

or sunlight angle, the maximum conductor size can be calculated by Isc

＊PV systems. See Isc value in PV module specification. When PV modules are

connected in series, Isc is equal to the Isc of PV modules. When PV modules are

connected in parallel, Isc is equal to the sum of Isc of PV modules. The Isc of the PV

array shall not exceed the maximum input current of the PV controller. See table

below:

NOTE: All PV modules in a given system are considered identical.

＊Isc = short circuit current (amps) Voc = voltage of the disconnected circuit.

Model

Max. PV input current

Max. size of PV wires＊

XTRA1210N

10A

4mm2/12AWG

XTRA2210N

20A

6mm2/10AWG

XTRA3210N

30A

10mm2/8AWG

XTRA4210N

40A

16mm2/6AWG

XTRA3415N

30A

16mm2/6AWG

XTRA4415N

40A

16mm2/6AWG

＊This is the maximum size of wires that will fit into the terminals of the controller.

CAUTION: When PV modules are connected in series, the open circuit

voltage of the PV system must not exceed 92V (XTRA**10N) or 138V

(XTRA

**15N) at an ambient temperature of 25°C.

➢Battery and load wire size

The size of the battery lead and load lead must match the rated current, see

reference sizes below:

Model

Rated

charging

current

Rated

discharge

current

Battery

lead size

Stress size

condu

ctor

dimen

sion

XTRA1210N

10A

4mm2/12AWG

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