Inverter and battery install

[Isetech]

We started with the 12 kw 3 phase inverter, battery, AC and DC controls today.

I laid out all the stuff, mounted the inverter, went through the equipment layout to make sure we dont have AC, solar or batter DC cables in the same wireways.

Installed the AC control DB and found the first snag, in single phase installs with a live and neutral, installing the CT is no problem, however id you use a Hager IP 44 DB instead of an IP 65 DB, trying to fit 3 CTs on the supply cable proves to be a bigger challenge than I expected. I figured out a way, however it is going to require a few modification to the main DB.

The difference for those who dont know, the Hager IP 65 DB's are nice and deep compared to the IP 44. I am going to fit din terminals next to the main switch and use panel wire to the top of the main switch.

[Isetech]

The building is a double story, fortunately I installed 2 x 32 mm PVC conduit as spares, when I rewired the building, they run from the roof to the room where the inverter is installed.

I am only going to be using 460 watt panels (roof space restrictions), the MPPT can take 3 strings (6 panels per string), so the 32 mm pipes will be big enough for 3 sets of 4mm wire (15 m runs) and a 6 mm earth wire.

The tricky part is going to be trying to install the earth spike. I might just install it at the meter on the boundary.

It would be extremely risky trying to sink earth spikes due to water pipes, sewage and all the power cables feeding all the other units.

[Isetech]

Then we come to the lithium batteries, I thought I would just flip it to the architect, who got the roof assessment done., but they came back and said I just need good ventilation.

It complicated, because it is in a complex.

I have found a place in the room next to the garage (between the garage and the house entrance)

My thoughts are to get a fire door fitted from the garage and the one going into the house

The room has a concrete roof and only windows on one wall.

The batteries will be positioned at the back corner on a mobile rack for now until I decide where to install them.

The 3 5.1 kwh batteries will be connected in cascade parallel, which means we only need 1 x 250 amp DC switch disconnect and because they will be rack mounted, the the links will be short.

the rack will be big enough to fit 6 batteries with circulating fans mounted on the top and vents all around the cabinets with wheels.

I will fit a smoke detector in the room.

It would be a bonus if I could link the smoke detector to the inverter to make it shut down if smoke is detected.