Inverter handling on unbalanced tri phase load

[cdsgames]

Hello

I am looking for a system for my house. We live in France in a very old house and even with a geothermal PAC we use about 21.000 Kwh per annum

So I am looking to install 15Kwc system with 10Kw of battery.

I see that Foxess has a PRO inverter where they advertise that triphase can be unbalanced. How about the normal inverter can it also handle unbalanced triphase load ?

Thx you for your time.

[Dave Foster]

The Fox H3 inverter is also able to be configured to work with unbalanced loads, see attached operational description from the H3 manual.

The maximum power it can output per phase is 1/3 of the inverters total output power i.e. an H3-15 inverter can output a maximum of 5 kW on each of it’s phases.

[cdsgames]

Yes the H3 pro can do it...I was asking about the non pro inverter 12Kwh

[Dave Foster]

Yes the H3 pro can do it...I was asking about the non pro inverter 12Kwh

That's what I said

The Fox 'H3' inverter is also able to be configured to work with unbalanced loads, see attached operational description from the 'H3' manual.

[cdsgames]

Thx you very much. Got it in regards to invertor.

Second question , I am thinking about batteries and have been offered Ep11 and C 4300. I seen the cycle life is not the same , any other difference ? What would you recommend ?

[Dave Foster]

Thx you very much. Got it in regards to invertor.

Second question , I am thinking about batteries and have been offered Ep11 and C 4300. I seen the cycle life is not the same , any other difference ? What would you recommend ?

The EP11 is the newer battery and has been deliberately priced to be cost effective, to do that Fox have reduced the guaranteed cycles and the warranty period to 5 years - it's early days yet but as it is the same LifePo4 cell technology it is hard to imagine there is any difference other than them trying to reduce the costs of their warranty to keep the entry price competitive - if you purchase the extended (10) year warranty the EP11 batteries should be very similar in battery throughput (this is the actual measure they guarantee the batteries with not cycles)

The ECS 4300 batteries are also good and have the 10 year warranty as standard.~

Main physical differences is the ECS4300 series are stackable and so it is easy to expand them with the addition of more slaves (and the batteries look better), individual batteries are lighter and easy to move ~ 30kg.

The EP11 is very heavy (100kg) and needs to be mounted to a wall even if standing on a hard surface as an anti-tip measure - in terms of expansion you can add more EP11 batteries but you must fit a junction box for this, if you think you might need more than a single EP11 ask the installer to fit the junction box now (it is only a few hundred Euros) as it would make adding more batteries later plug and play.

Also to mention the EP11 series is now being fitted with a heater (make sure you specify it as there are some older versions still out there where it is not fitted), if the batteries are not located in a sheltered warm environment this is very beneficial on cold days and will keep the batteries charging and discharging at much lower temperatures than the ECS4300 can handle.

Final point these batteries are very much alike, same technology, a few physical differences in size and looks but operationally very similar and if you purchase the extended 10 year warranty on the EP11 it is very comparable to the warranties that Fox offer on other batteries.