The medical centre was to be refurbished and part of the upgrade and was to install a PV system with battery storage. 

Aim was to provide a backup supply. 

The objective was to provide backup full power services during occasional blackouts. Most important was to provide electricity supply during a major disaster, like a bushfire within their area.

The difficulty was allocating the space for battery storage.

A space was identified under the stairwell as the only realistic place to house the batteries and inverters. This limited the type of battery storage the medical centre could go for due to both space and safety requirements.

Requirements

 In the tight space the battery needed to be safe for patients as well as staff. 

Lead acid – wasn’t suitable as there was no ventilation to allow for any gassing and being a medical centre lead based batteries weren’t considered suitable due to toxicity. To provide 15+ kWh of useable battery storage would have also meant a larger installation than the space provided.

Lithium ion – weren’t considered suitable due to their fire risk and their being no suitable outside area to house the batteries.

The Salt batteries were picked and are supported by 3 x Victron inverters with an inverter on each phase.