KACO blueplanet gridsave eco 5.0 TR1 - Manual (Page 8)

Description of the unit
Page 8 Operating instructions for blueplanet-gridsave eco_EN
3.1.2 Off Grid Stand Alone Power Systems (SPS)
Battery
Renewable energy sources Generator
AC supply
Figure 2: Schematic overview of a standalone energy system
With off-grid operation, the connection of a generator is intended both to supply higher site loads and to charge the
connected batteries.
The site loads can also include short-term peak power levels that are much higher than the rated permanent load.
(Example: when switching on water pumps or a welding system).
The charge parameters are automatically adjusted in line with the operating temperature and ensure precise and
safe charging.
The battery charging process consists of initial, bulk, absorption, trickle and regenerative charging.
The following approximate formula can be used to calculate the system battery capacity:
Daily power consumption in Wh divided by nominal voltage of the battery = multiply result by 2 (50% discharge
depth) = multiply result by 5 (5 day standalone operation = battery capacity required
Example: 4500 Wh : 48 V = 93.75 x 2 = 187.5 x 5 = 937.5 Ah
When designing the system, short-term current peaks should be taken into account. (Example: when starting induc-
tive loads)
NOTE
A generator that is too small or too large for the plant can result in inefficient operation and higher
operating costs, however.
The energy supply quality has an immediate effect on the AC loads.