Selectronic SP Pro Service Manual download pdf (Page 14)

Continuing to advance the highly acclaimed SP PRO

technology, Selectronic in co-operation with KACO

Germany are pleased to release a further development

to our AC Coupling methodology, now appropriate for

Off Grid and Diesel Grid use as well as Solar Hybrid (Grid

Backup).

By connecting up to 5 KACO Grid Tie inverters to the AC

Load side (output) of any single phase SP PRO system, it is

now possible to utilise efficient high voltage PV arrays that

are located remotely from the battery bank. This allows

you to continue to use a wide choice of PV installers and

common components; no need to be concerned about

cable loss in long, expensive low voltage cable runs.

By creating an AC Bus, an AC Coupled system will allow

PV energy to be efficiently used directly by the load with

excess PV energy going back through the bi-directional SP

PRO to charge batteries or export to the grid.

PV energy will continue to be utilised at all times,

regardless of generator or grid availability.

The battery charging system in the SP PRO has proven

unmatched in control and stability. This has now been

extended into PV based AC Coupled systems. The SP

PRO/KACO RS485 link provides the same precise control

over the AC Coupled PV. Regardless of charging source

your batteries will enjoy maximum life with SP PRO

charging.

The KACO grid inverter can be considered as an AC

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by any SP PRO, the total AC Output of the combined

KACO inverters must not exceed twice the continuous

power rating of the SP PRO or the SP PRO surge rating,

whichever is smallest. Presently, the KACO Powador 02

series supplied by Selectronic are suitable for AC Coupling.

The 02 series range from 1.65kW to 5kW AC output.

Site consumption and generation data continues to be

logged by the SP PRO including the AC Coupled solar

production.

SP PRO / KACO AC Coupling

The Selectronic advantage.

Selectronic/KACO AC Coupling benefits



Reduced installation costs due to high voltage PV strings - up to 600V DC o/c.



Maximum conversion efficiency for AC loads.



PV array can be placed hundreds of meters form the battery bank with

significantly reduced power loss.



System components can be placed in the most appropriate position.



Additional PV can be easily added later.



Complete and precisely controlled battery charging to 100% SoC.



All battery charging parameters controlled by one device: SP PRO.



Grid backup easily added to existing KACO grid system with no rewiring of PV.



If communications are disabled between the KACO and SP PRO, AC Frequency

shift will be automatically implemented.



Maximum cable run for RS485 wiring is 250m, Cat 5 or similar cable.



AC Coupling adaptor mounts within 2 metres of SP PRO using cables supplied.



KACO inverters do not need to be all the same model.



Wireless RS485 communications options available.

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Selectronic SP Pro Service Manual Page 14

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