Sterling Power Products
Copyright
Engine Starter
Battery
(connected to alternator)
House / Domestic / Aux
Battery Bank
(arranged here as a 12V bank)
T
emp
Sensor on
negative
Installation Diagram Solar BBS1230
Negatives: The reason to
not use CHASSIS ground
is that the conductivity is
poor. This shall result in
worsened performance.
Output voltage shall climb
at a slower rate. Charging
rate shall be slower.
Please use direct cable for
best performance.
Please be advised that the solar
charger and the BB charger do
not work at the same time. When
your engine is running, the BB
aspect of the BBS charges.
When the engine / ignition is off,
the solar charger works. They do
not work simultaneously.
in compliance with good
electrical practice all wires
directly connected to a
battery should be correctly
fused. The applicable fuse
must be fitted close to the
battery side of the cable.
Aux
Batt.
out +
Engine
Batt. in+
Solar
Negative
Common
Negative
BMS (2)
BMS (1)
Ignition
feed
Remote
Voltage
sense
Upper
Lower
Remote
control
Solar
Pos +
+ + +
- -
lithium
BMS
Controller
(if used)
Ignition feed
a live feed when
engine is running.
A live voltage when
running and 0V
when engine off.
fuse
fuse
50A
50A
Sterling Power Products
H Charge
Float
In / Unit
Out / Rem
Batt.
V
12.2
Temp
Menu
Change
Volts
Select
Audible alarm on/off
hold > 3 sec
On / Off
hold>3 sec
Fault
Absorption
Cond.
optional
remote BBURC
Must fit
Must fit
Optional fit
Optional fit
Battery
temperature
sensor
Solar input. There is no limit to
the solar panel array combined
wattage, however, the BBS unit
can only process up to 350W.
However, in milder climates
larger cells can be used as the
mean average - because in non
sunny climates panels shall not
produce full power.
Max 31V DC. Max harvest 350W
Important
NEGA
TIVES
should all be common.
DON'T USE CHASSIS
W
e recommend joining
the BB’s neg. using cable
direct to the
starter battery negative.
For improved efficiency.
7
BBS1230 - New to 2020
battery maintainer
The battery maintainer is a unique BB Solar feature. It
allows the back feed of current from surplus output battery
current back to the starter battery. The current rate is
somewhere between ~0.3A-1A depending on the voltage
differential. Basically, if the output battery is full and the
starter battery is very empty the current flow shall be on the
higher end and vice versa. The maintainer only operates
when there is charging on the output battery (i.e. when the
solar power is charging your domestic battery or an
independent battery charger) it does NOT deplete your
house batteries! The mode is on as default and can be
turned off by pressing the SELECT button down for 35
flashes and letting go.
when the domestic battery is being charged,
surplus current shall flow back into the starter
battery
main current flow during
solar charging
small backfeed current
only when house battery is charging
House / Domestic / Aux
Battery Bank
(arranged here as a 12V bank)
Engine Starter Battery
(connected to alternator)
1 2 3
4 5 6
see previous
page about BMS
Optional fit
line to ignition
(recommended if vehicle is Euro 6)
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