System size versus inverter

skay2007

Hi - I’ve been quoted for 2 systems and wondering what will work better for our usage?  Both systems have been quoted of a similar size 6.56 vs 6.09kW

Our annual consumption is ~5000kWh

1) 16* 410w Canadian Solar panels

6kW Growatt inverter

5kW Growatt battery

£12100


2) 14* 435W Canadian Solar panels

3.6kW GivEnergy inverter V3

9.5kW Giv battery

£12050

I work shifts so will be in during the day at varying times. Any advice appreciated!

94JDH

skay2007 said:

Hi - I’ve been quoted for 2 systems and wondering what will work better for our usage?  Both systems have been quoted of a similar size 6.56 vs 6.09kW

Our annual consumption is ~5000kWh

1) 16* 410w Canadian Solar panels

6kW Growatt inverter

5kW Growatt battery

£12100


2) 14* 435W Canadian Solar panels

3.6kW GivEnergy inverter V3

9.5kW Giv battery

£12050

I work shifts so will be in during the day at varying times. Any advice appreciated!

The second quote would benefit from the 5kW inverter but I'm guessing it's been done to comply with simple G98 application, lazy in my opinion.

QrizB

94JDH said:

skay2007 said:

Hi - I’ve been quoted for 2 systems and wondering what will work better for our usage?  Both systems have been quoted of a similar size 6.56 vs 6.09kW

Our annual consumption is ~5000kWh

1) 16* 410w Canadian Solar panels

6kW Growatt inverter

5kW Growatt battery

£12100


2) 14* 435W Canadian Solar panels

3.6kW GivEnergy inverter V3

9.5kW Giv battery

£12050

I work shifts so will be in during the day at varying times. Any advice appreciated!

The second quote would benefit from the 5kW inverter but I'm guessing it's been done to comply with simple G98 application, lazy in my opinion.

 But the second quote includes a battery, so they'll need G99 regardless of the inverter size?

94JDH

QrizB said:

94JDH said:

skay2007 said:

Hi - I’ve been quoted for 2 systems and wondering what will work better for our usage?  Both systems have been quoted of a similar size 6.56 vs 6.09kW

Our annual consumption is ~5000kWh

1) 16* 410w Canadian Solar panels

6kW Growatt inverter

5kW Growatt battery

£12100


2) 14* 435W Canadian Solar panels

3.6kW GivEnergy inverter V3

9.5kW Giv battery

£12050

I work shifts so will be in during the day at varying times. Any advice appreciated!

The second quote would benefit from the 5kW inverter but I'm guessing it's been done to comply with simple G98 application, lazy in my opinion.

 But the second quote includes a battery, so they'll need G99 regardless of the inverter size?

It's a DC coupled battery behind a 3.6kW hybrid inverter, which means you can add (multiple)'batteries as long as the inverter is unable to discharge more than 3.68kWh which is one of the advantages over AC and keeps it within G98 rules.
The second option is nerfed on the inverter by the amount of panels, hence the G99 remark.