Leonardo System 3000
Manuale installazione
Leonardo System 3000
Technical Manual
Rev. 1.0
14-05-2012
This document is the property of
WESTERN CO. Srl
- All rights are reserved - Reproduction and use of information contained within this document is forbidden without the written consent of
WESTERN CO.
Srl
6
Battery nominal voltage
Features of PV modules
Nominal voltage of 12V battery
I
PAN
V
PAN
V
OC
V
mp
V
mp
: voltage at maximum power at T=25°C > 15,0V
V
OC
: open circuit voltage at T=-10°C <100V
P
MAX
: maximum power at 25°C < 250W
We recommend mono or poly-crystalline silicon modules
with a number of cells from minimum 36 to maximum 144.
Nominal voltage of 24V battery
V
mp
: voltage at maximum power at T=25°C > 30,0V
V
OC
: open circuit voltage at T=-10°C <100V
P
MAX
: maximum power at 25°C < 500W
We recommend mono or poly-crystalline silicon modules
with a number of cells from minimum 72 to maximum 144.
WRM-15 PV charge controllers make a charge of the battery in three charge phases according to the features of the
main manufacturers of lead batteries.In Fig. 5 you can see the charge voltage through time during the three phases.
For a more thorough understanding of WRM-15, please effect the
download
of WRM15 technical manual directly
from
www.western.it
web site.
NOTTE
BULK
AB SORPTION
FL OA T
NOTTE
V
f loa t
V
c h
T
Abs .
Fig.6 WRM15 charging curve
The voltage levels that the regulator imposes to the battery (Vch , Vfloat) always refer to the nominal temperature of
25°C. With changes in temperature also the voltages imposed by the regulator vary, as recommended by battery
manufacturers; there is a decrease of 4mV/cell for every increase of a degree of temperature. WRM-15 allows to set
all the charging parameters in Fig.6, with factory value in case of SEAL batteries and nominal voltage of 24V, equal to
Vch=28,8V and Vfloat=26,8V.
EXTERNAL SIGNALLINGS
Visualizations of PV charge regulators
Day/Ni ght status
Di sp layed o nly i n the con fi gur ation
screens
Lo w bat tery prot ecti on
Load pow er on
It ind icates whi ch charg e
prog ram is cu rren tly se t
It d isplays the i ntern al measure s
Vo ltage l evel i nside
the b attery
In dicati on of curr ent
absor ption on th e load
I ndi cat ion o f cur rent
ab so rpti on from
the P V
mo dul e
