Victron energy BlueSolar MPPT 100/50 User manual

2
1.8 Automatic battery voltage recognition
The MPPT 100/50 will automatically adjust itself to a 12V or a
24V system.
1.9 Adaptive three step charging
The BlueSolar MPPT Charge Controller is configured for a three
step charging process: Bulk – Absorption - Float.
1.9.1. Bulk stage
During this stage the controller delivers as much charge current
as possible to rapidly recharge the batteries.
1.9.2. Absorption stage
When the battery voltage reaches the absorption voltage setting,
he controller switches to constant voltage mode.
When only shallow discharges occur the absorption time is kept
short in order to prevent overcharging of the battery. After a deep
discharge the absorption time is automatically increased to make
sure that the battery is completely recharged. Additionally, the
absorption period is also ended when the charge current
decreases to less than 2 A.
1.9.3. Float stage
During this stage, float voltage is applied to the battery to
maintain it in a fully charged state.
1.10 Connectivity
See section 3.8 of this manual
1.11 Remote on-off
The MPPT 100/50 can be controlled remotely by a VE.Direct non
inverting remote on-off cable (ASS030550300). An input HIGH
(Vi > 8V) will switch the controller on, and an input LOW (Vi < 2V,
or free floating) will switch the controller off.
Application example: on/off control by a VE.Bus BMS when
charging Li-ion batteries.
1.12 Real-time data display on Apple and Android
smartphones, tablets and other devices
VE.Direct to Buetooth Low Energy (BLE) dongle needed: see our
website.

4
3. Installation
3.1 General
● Mount vertically on a non-flammable surface, 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 at least 10 mm² or AWG6 cross section. The
recommended maximum length of the cable is 5 m, in order to
restrict cable loss.
(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 10 mm² or AWG6 cable
to the controller).
● Grounding: the heatsink of the controller should be connected
to the grounding point.
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: 100V.
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: 144 cells (4x 12V or 2x 24V panel in series).

6
3.5 Configuration of the controller
Fully programmable charge algorithm (see the software page on
our website) and eight preprogrammed charge algorithms,
selectable with a rotary switch:
Pos
Suggested battery type
Absorption
V Float V
Equalize
V
@%Inom
dV/dT
mV/°C
0 Gel Victron long life (OPzV)
Gel exide A600 (OPzV)
Gel MK
28,2 27,6
31,8
@8% -32
1
Gel Victron deep discharge
Gel Exide A200
AGM Victron deep discharge
Stationary tubular plate (OPzS)
Rolls Marine (flooded)
Rolls Solar (flooded)
28,6 27,6 32,2
@8% -32
2
Default setting
Gel Victron deep discharge
Gel Exide A200
AGM Victron deep discharge
Stationary tubular plate (OPzS)
Rolls Marine (flooded)
Rolls Solar (flooded)
28,8 27,6 32,4
@8% -32
3 AGM spiral cell
Stationary tubular plate (OPzS)
Rolls AGM
29,4 27,6
33,0
@8% -32
4 PzS tubular plate traction
batteries or
OPzS batteries
29,8 27,6
33,4
@25% -32
5 PzS tubular plate traction
batteries or
OPzS batteries
30,2 27,6
33,8
@25% -32
6 PzS tubular plate traction
batteries or
OPzS batteries
30,6 27,6
34,2
@25% -32
7
Lithium Iron Phosphate
(LiFePo4) batteries
28,4 27,0 n.a. 0
Note: divide all values by two in case of a 12V system.

8
3.7 Battery charging information
The charge controller starts a new charge cycle every moring,
when the sun starts shining.
The maximum duration of the absorption period is determined by
he battery voltage measured just before the solar charger starts
up in the morning:
Battery voltage Vb (@start-up) Maximum absorption time
Vb < 23,8V 6 h
23,8V < Vb < 24,4V 4 h
24,4V < Vb < 25,2V 2 h
Vb > 25,2V 1 h
(divide voltages by 2 for a 12 V system)
If the absorption period is interrupted due to a cloud or due to a
power hungry load, the absorption process will resume when
absorption voltage is reached again later on the day, until the
absorption period has been completed.
The absorption period also ends when the output current of the
solar charger drops to less than 2 Amps, not because of low solar
array output but because the battery is fully charged (tail current
cut off).
This algorithm prevents over charge of the battery due to daily
absorption charging when the system operates without load or
with a small load.