27
4.6
Notes on the battery pack sizing
Solar Eclipse works with a battery pack with a rated voltage 48 V.
Standard battery on sale can be both integrated type with an output voltage 48 V, both batteries
with lower voltage (for example 24 V, 12 V, 2 V, etc.) which suitably connected in series to provide
a nominal voltage of 48 V see table 3
Single battery voltage
48V
24V
12V
2V
Number of batteries to be connected in
series
1
2
4
24
Table 3
–
Number of batteries depending of the nominal voltage
The recommended capacity of the battery may vary depending on the system power and
depending on the users' consumption from 25 Ah to 550 Ah.
By paralleling two groups 48 V you get a battery pack to double capacity in Ah.
The type of batteries can be of any type (Commercial Batteries, Gel-AGM-flat plate, tubular OPzV,
Tubular OPZS, Aquion, Lithium type LiPoFe4, etc) as the charge cycle is programmable during
configuration through the software supplied.
The rate of discharge of the batteries is automatically set by the Solar Eclipse logic, but can be
varied according depending on the type of batteries used by following the "free configuration"
procedure of the software.
The commercial batteries, for example, are not of great quality and the percentage of download set
by default by Solar Eclipse is 20%, while the stationary AGM batteries are set at 30% discharge.
If your home does not have special loads during the night other than a refrigerator, lights for
lighting and normal utilities such as television, and using appliances during daytime you can
restrict your night consumption at about 2 ~ 2,5 kWh.
In this case, therefore, for example, you can use 4 AGM batteries 12 V and 150 Ah connected in
series to have that guarantee self-sufficiency throughout the night because:
Battery energy available in Wh = batt voltage. X Ah capacity x percentage of download
Battery energy available in Wh = 48 V x 150 Ah x 30/100 = 2160 wh = 2.16 kwh
