Fronius Reserva Battery

Return On Investment

While battery storage for your solar power system sounds like a great idea we like to take a measured approach when recommending it for our clients. The simple reason for this is to give you an idea on the return on investment a battery might give you – if that’s important to you. We still have some clients with large solar power systems without a battery who have no power bills therefore there is absolutely no return on investment for them to install a battery for their system.
Ideally we suggest installing a solar power system prior to a battery and collecting your production & consumption data to evaluate the benefit of a battery. The Fronius Gen 24 inverter when combined with the Fronius smart meter allows us to do this by capturing your data and publishing it to the Solarweb website. Using the simulation tool on Solarweb with 12 months of data we can see what your percentage of self-consumption is and what it will increase to by selecting one of a variety of battery sizes from a drop down list. In some cases doubling a battery size will only increase self-consumption by 1%.

Installation Location

There are several rules around where batteries may be installed –
Within 600MM (sides) & 900MM (below):
Any exit;
Vertical side of a window or building ventilation for a habitable room;
Hot water, air conditioning, other appliances not integrated with the battery
Ceiling spaces, roofs and wall cavities
Under stairways, access walkways or evacuation routes.
Where a battery is installed on a wall opposite to a habitable room or within 300MM the wall must be made of non-combustible material or have non combustible material e.g. cement sheeting installed 600MM vertically & 900MM horizontally beyond the battery.

Back-up Power Supply

When a backup power supply is configured you can supply your entire household with self-generated electricity during a grid failure (as long as enough power from the PV system or the storage is available). The Fronius GEN24 Plus hybrid inverter and an energy storage device, together with Backup Controller*, ensure a smooth transition to backup power mode. The Backup Controller can be installed in the switch cabinet to save space. It automatically switches to Full Backup mode and returns to normal operation as soon as the grid becomes available again. The Backup Controller makes additional switchover boxes unnecessary.