Victron energy BlueSolar MPPT 70/15 User manual

Manual
EN
Handleiding
NL
Manuel
FR
Anleitung
DE
Manual
ES
Användarhandbok
SE
Appendix
BlueSolar charge controller MPPT 70/15

1
EN NL FR DE ES SE Appendix
1 General Description
1.1 Ultra fast MPPT tracking
Especially in case of a clouded sky, when light intensity is changing continuously, a fast
MPPT algorithm will improve energy harvest by up to 30% compared to PWM charge
controllers and by up to 10% compared to slower MPPT controllers.
1.2 BatteryLife: intelligent battery management
1.2.1. Conventional battery management
When a solar charge controller is not able to recharge the battery to its full capacity
within one day, the result is often that the battery will be continually be cycled between
a “partially charged” state and the “end of discharge” state. This mode of operation (no
regular full recharge) will destroy a lead-acid battery within weeks or months.
1.2.2. BatteryLife algorithm
The BatteryLife algorithm will monitor the state of charge of the battery and day by day
slightly increase the load disconnect level until absorption voltage is reached. From that
point onwards the load disconnect level will be modulated so that absorption voltage is
reached about once every week. The BatteryLife algorithm will substantially increase
service life of the battery when compared to 1.2.1.
1.2.3. Upsizing the PV array or regularly “downsizing” the load
A lead-acid battery will last even longer if a full recharge, including several hours
absorption time, is achieved at least once every week.
1.3 Load output
The load output is short circuit proof and can supply loads with a large DC input
capacitor such as an inverter (but it can not start a DC load and an inverter
simultaneously).
Alternatively, an inverter can be switched on and off by using the load output to switch the
remote on-off of the inverter (see section 3.6).
1.4 Resin encapsulated electronics
Protects the electronic components are against the environment
1.5 Internal temperature sensor
Compensates absorption and float charge voltages for temperature.

2
1.6 Automatic battery voltage recognition
The MPPT 70/15 will automatically adjust itself to a 12V or a 24V system.
1.7 Three step charging
The BlueSolar MPPT Charge Controller is configured for a three step charging process:
Bulk – Absorption - Float.
1.7.1. Bulk stage
During this stage the Controller delivers as much charge current as possible to rapidly
recharge the batteries. When the battery voltage reaches the absorption voltage setting, the
Controller activates the next stage (absorption).
1.7.2. Absorption stage
During this stage, the Controller switches to the constant voltage mode, where the
absorption voltage is applied to the battery. When the charge current decreases to the float
transition current setting, the battery is fully charged and the Controller switches to the float
stage.
1.7.3. Float stage
During this stage, the float voltage is applied to the battery to maintain it in a fully charged
state.
When battery voltage drops below 13,2 Volt during at least 1 minute a new charge cycle will
be triggered.

3
EN NL FR DE ES SE Appendix
2 Safety instructions
●It is advised to read this manual carefully before the product is installed and put into
use.
●This product is designed and tested in accordance with international standards. The
equipment should be used for the designated application only.
●Install the product in a heatproof environment. Ensure therefore that there are no
chemicals, plastic parts, curtains or other textiles, etc. in the immediate vicinity of the
equipment.
●Ensure that the equipment is used under the correct operating conditions. Never
operate it in a wet environment.
●Never use the product at sites where gas or dust explosions could occur.
●Ensure that there is always sufficient free space around the product for ventilation.
●Refer to the specifications provided by the manufacturer of the battery to ensure that
the battery is suitable for use with this product. The battery manufacturer's safety
instructions should always be observed.
● Protect the solar modules from incident light during installation, e.g. cover them.
● Never touch uninsulated cable ends.
● Use only insulated tools.
● Connections must always be made in the sequence described in section 3.5.
Danger of explosion from sparking
Danger of electric shock

4
3. Installation
3.1. General
● Mount vertically on a non-flammable substrate, with the power terminals facing
downwards.
●Mount close to the battery, but never directly above the battery (in order to prevent
damage due to gassing of the battery).
●Use cables with 6 mm² cross section. Do not exceed 5 m cable length.
(if the cables to the PV panels must be longer than 5 m, increase cross section or use
parallel cables and install a junction box next to the controller and connect with a short 6
mm² cable to the controller).
●20A battery fuse: replacable fuse in the controller, next to the battery terminals.
●Grounding: if grounding is required, use one grounding point only. Never ground both
the minus of the solar array and the minus of the battery.
3.2. PV configuration
● The controller will operate only if the PV voltage exceeds battery voltage (Vbat).
● PV voltage must exceed Vbat + 5V for the controller to start. Thereafter minimum PV
voltage is Vbat + 1V.
● Maximum open circuit PV voltage: 75V.
The controller can be used with any PV configuration that satisfies the three above
mentioned conditions.
For example:
12V battery and mono- or polycristalline panels
● Minimum number of cells in series: 36 (12V panel).
● Recommended number of cells for highest controller efficiency: 72
(2x 12V panel in series or 1x 24V panel).
● Maximum: 108 cells (3x 12V panel in series).
24V battery and mono- or polycristalline panels
● Minimum number of cells in series: 72
(2x 12V panel in series or 1x 24V panel).
● Maximum: 108 cells (3x 12V panel in series).

5
EN NL FR DE ES SE Appendix
3.3. Configuration of the controller (see figure 1 and 2)
A four pin header is available to select one of three battery management options:
3.3.1. No bridge: BatteryLife algorithm (see 1.2.2.)
3.3.2. Bridge between pin 3 and pin 4: conventional (see 1.2.1.)
Low voltage load disconnect: 11,1V or 22,2V
Automatic load reconnect: 13,1V or 26,2V
3.3.3. Bridge between pin 2 and pin 3: conventional (see 1.2.1.)
Low voltage load disconnect: 11,8V or 23,6V
Automatic load reconnect: 14V or 28V
3.4 LED’s
Green LED: will be on or blinking when the battery has been connected
On: one of the two conventional algorithms
Blinking: BatteryLife algorithm
Yellow LED: signals charge sequence
Off: no power from PV array (or PV array connected with reverse polarity)
Blinking fast: bulk charge (battery in partially charged state)
Blinking slow: absorption charge (battery charged to 80% or more)
On: float charge (battery fully charged)
3.5 Cable connection sequence (see figure 3)
First: connect the cables to the load, but ensure that all loads are switched off.
Second: connect the battery (this will allow the controller to recognize system voltage).
Third: connect the solar array (when connected with reverse polarity, the controller will heat
up but will not charge the the battery).
The system is now ready for use.
3.6 Connecting an inverter
The load output can be used to supply DC loads and simultaneously to control an inverter.
The Victron inverters model Phoenix 12/800, 24/800, 12/1200 and 24/1200 can be
controlled by connecting the left side connection of the inverter remote control directly to the
solar charger load output (see figure 4).
For the Victron inverters model Phoenix 12/180, 24/180, 12/350, 24/350, the Phoenix
Inverter C models and the MultiPlus C models an interface cable is needed (MPPT 70/15 to
inverter remote on-off cable, article number ASS030550100, see figure 5).

6
4. Troubleshooting
Problem
Possible cause
Solution
Charger does not
function
Reversed PV connection Connect PV correctly
No fuse inserted Insert 20A fuse
Blown fuse Reversed battery connection 1. Connect battery correctly
2. Replace fuse
The battery is not
fully charged
A bad battery connection Check battery connection
Cable losses too high Use cables with larger cross
section
Large ambient temperature
difference between charger
and battery (T
ambient_chrg
>
T
ambient_batt
)
Make sure that ambient
conditions are equal for charger
and battery
Only for a 24V system: wrong
system voltage chosen (12V
instead of 24V) by the charge
controller
Disconnect PV and battery, after
making sure that the battery
voltage is at least >19V,
reconnect properly
The battery is being
overcharged
A battery cell is defect Replace battery
Large ambient temperature
difference between charger
and battery (T
ambient_chrg
<
T
ambient_batt
)
Make sure that ambient
conditions are equal for charger
and battery
Load output does not
become active
Maximum current limit
exceeded
Make sure that the output
current does not exceed 15A
DC load in combination with
capacitive load (e.g. inverter)
applied
Disconnect DC load during start-
up of the capacitive load
Disconnect AC load from the
inverter, or connect inverter as
explained in section 3.6
Short-circuit Check for short-circuit in the
load connection

7
EN NL FR DE ES SE Appendix
5 Specifications
BlueSolar charge controller MPPT 70/15
Battery voltage 12/24 V Auto Select
Maximum battery current 15 A
Maximum PV power, 12V 1a,b) 200 W (MPPT range 15 V to 70 V)
Maximum PV power, 24V 1a,b) 400 W (MPPT range 30 V to 70 V)
Automatic load disconnect Yes, maximum load 15 A
Maximum PV open circuit voltage 75 V
Peak efficiency 98 %
Self consumption 10 mA
Charge voltage 'absorption' 14,4 V / 28,8 V
Charge voltage 'float' 13,8 V / 27,6 V
Charge algorithm multi-stage adaptive
Temperature compensation -16 mV / °C resp. -32 mV / °C
Continuous/peak load current 15A / 50A
Low voltage load disconnect 11,1 V / 22,2 V or 11,8V / 23,6V
or BatteryLife algorithm
Low voltage load reconnect 13,1 V / 26,2 V or 14 V / 28 V
or BatteryLife algorithm
Protection Battery reverse polarity (fuse) Output short circuit
Over temperature
Operating temperature -30 to +60°C (full rated output up to 40°C)
Humidity 100 %, non-condensing
ENCLOSURE
Colour Blue (RAL 5012)
Power terminals 6 mm² / AWG10
Protection category IP65 (electronic components)
Weight 0,5 kg
Dimensions (h x w x d) 100 x 113 x 40 mm
1a) If more PV power is connected, the controller will limit input power to
200W resp. 400W.
1b) PV voltage must exceed Vbat + 5V for the controller to start.
Thereafter minimum PV voltage is Vbat + 1V.

8