Just a query for those who know more than me.
We currently have a Gen1 5 kW Hybrid inverter with a Gen1 5.2 kWh battery (which I believe is an 80% DoD). We are looking to expand our current battery capacity. Will we be able to install a Gen2 9.5 kWh battery and it be completely compatible with our system? Will it have 100% DoD?
Thanks
JMalcolm AFAIK the battery will be fully supported. The issues will be getting it wired up as by convention, the larger battery should be closest to the inverter and be configured as master. However, as the cables are fixed length, I can't see any reason not to locate it to the side of your existing battery and daisy chain that battery as slave off the new battery as master, which would be connected to the inverter. Assuming that your existing installation includes a battery DC isolator, you will need cables for your new battery that have the battery lugs on one end for the battery and crimped ferrules for screw termination on the other end for the isolator. The existing battery cables may need to be replaced with ones having battery lugs on one end (to daisy chain to the new battery) and crimped ferrule terminations on the other (for the existing battery). Hopefully by the time your installation goes ahead, the issues with BMS will be resolved and you will get the full capacity out of both batteries.
Whatever you currently see in the portal as your battery capacity (5.2kWh?) will become (9.5+5.2=) 14.7kWh and each individual battery should charge and discharge at a rate that sees the SoC for each battery stay close. ie the larger one will charge and discharge at a higher rate so that the voltage on each battery stays within a tight band; at least that's my understanding of how the BMSs are intended to work together with the inverter.
I have a 8.2kw 100% DOD with a new 9.5kw DOD. They work fine together apart from the SoC issue. I get to either 87% or 91% then the system jumps to 100%.
Battery Capacity
346 Ah | 17.72 kWh | (2 Packs)
I appreciate the responses. Thanks
The new 9.5 kWh battery uses a specialist connector for power and data (both in and out), so you will need 2 new cables as well as the battery.
The new orange cables come in 2 types, 'ring to connector' for inverter to new battery and new battery to old battery, and 'connector to connector' for daisy chaining multiple 9.5 kWh batteries.