r/SigenergyAustralia

I haven’t seen it mentioned, so I thought I’d share.

I recently asked my battery installer for a quote on the AC charger, thinking the cost of the DC would be prohibitive. They quoted $3,100, which seems very high. Their explanation was that because my switchboard was on the far side of the house from the garage, that cabling added a significant amount.

They suggested the 12kW DC charger instead, seeing as my battery is in the garage and the cost had recently dropped about 40%. They quoted $4K (installed), which would be a no-brainer for me compared to the AC option.

I also asked for a quote on the 25kW charger, which was $5,500. Also tempting.

I am wondering if the prices may come down further. Also conscious that the energy crisis could push prices up in the medium term.

Keen to hear anyone else’s insights.

ETA: we’ve already had our battery installed. I’m sure prices are generally better if you get the charger installed along with the battery.

Hi guys, from SA with ❤️! I'm looking at Sigenergy battery 40+ Kwh 3 phase with a DC charger for my home. How much will it cost?

My question is similar to some of the other recent posts but didn't want to hijack them, I have 15kw solar on a 15kw 3ph inverter, gateway and 16kwh of batteries on my house. I want to add more panels with a standalone Sig inverter and have a couple of options but unsure of what the capabilities and limitations of the Sig system are:

1. Detached garage with a 20a 3ph supply, can I add another 8-10kw of solar and 3ph Sig inverter using the existing supply instead of a dedicated cable back to the gateway? Dedicated ethernet is available.

2. Sleepout with 2ph supply cable from gateway but only 1ph used, can I run a single phase inverter on the unused phase but sharing the neutral? I assume the 3ph house inverter will work to balance out the phase loading based on the grid CTs? Only shared ethernet available from here but wifi to both.

Thanks

Have installed sigenergy + intelligent go tariff for EV. Using sig AI which is doing well - with the exception of handling the extra octopus intelligent slots

As i currently set the tariff plan in sigen manually, and there's no integration for this intelligent tariff, for the hours (2330-530 offpeak) any extra window put in by octopus will not register - meaning when the charger pulls electric then, the system will dump the battery to power it.

I've managed to get all the tariffs into home assistant, including when octopus adds new windows - however cant see how i can automate the writing of the new windows into the sigen app. Anyone dealt with this?

So we’ve just lost NBN and I wanted to check the Sigenstor to see the battery level. Im on the same Wireless network but the app is showing stale data and nothing for the current usage and battery level.

Surely I should be able to direct connect to the system without internet?

Looking for someone who has Shelly installed to control hot water tank. We have battery but no gateway so our option to control hot water tank is either contactor with timer or Shelly. I have asked our installers for Shelly but they now saying they will not install it as there are issues with it and they can only do timer. Anyone has issues with Shelly?

Hi, I have solar, 20kwh battery and an Evnex E2 EV charger. I made the mistake of leaving the car plugged in after charging from excess solar then once the charging schedule kicked in on the charger, it dumped the whole battery into the car and then started drawing from the grid. Subsequently I had an empty battery in the morning. I dont want to do that again particularly at this time of the year when it is not til after 9am that I start generating enough solar.

After discussing with Evnex, to avoid this i need to rewire my charger to put it on the other side of the gateway. Not prepared to do that given the amount of work and so the other option is to change the Evnex and put in a Sigenergy 7kw AC charger.

Does anyone have one of these and are you able to charge your ev at night without draining the battery. A google of this seems like I can get what I want with the Sigenergy charger buy changing the settings in the app. That sounds right given the integration but obviously I cant see these settings because I dont have the charger.

Cheers.

I’ve got a Sig energy battery and want to weld using grid power instead of draining the battery. I tried setting battery reserve to 100%, but it pulled grid power to charge. I just want the solar to charge the battery while the house runs on the grid during welding. Is there a clean way to switch to grid-only?

Hey guys, just wanting to get some clarification on the correct wiring for a Sigenergy system.

I believe the correct method is:

• MSB main switch load → Gateway Grid port

• Gateway Non-Backup port → Non-essential loads

• Gateway Backup port → Backed-up loads

However with this configuration, isolating the Gateway also cuts power to the non-essential loads. What is the recommended approach for maintaining power to those loads during a Gateway isolation or maintenance window?

Initially, I thought it should be wired as

• MSB main switch load → Gateway Grid port

• MSB main switch load → Gateway Non-Backup port

• Gateway Backup port → Backed-up loads

But I’ve been told this method gives inaccurate consumption readings

Have 40kw battery and a 12.5kw DC charger system and thought I was good with the AI system to ensure I have battery for peak morning/afternoon times and also some charge in my car.

Turns out the AI is all but useless, over had it running a few months so assume that would be enough time for it to adjust its settings.

So to find a better option I found Predbat for Home Assistant and wondered if anyone else is running it to control the battery instead of Sigen AI.

I have it in monitor mode at the moment with some additional sensors before I allow it to control my system. My plan is to let it monitor and see if it is smarter than the Sig AI.

Anyone able to comment on Predbat and if it is better than the Sig AI before I custom create something that will ensure I'm not paying peak rates for no reason.

Does anyone know if the 25kw DC charger will be limited by singlephase? What I mean is if I have a 25kw DC charger, will it charge at the full 25kw rate if my battery is empty, i.e. only from the grid? I currently have a 8kw inverter and the batteries charge at a max of 8kw becuase of it. I only have 6.6kw of solar so just wondering if theres a point in going for the 25kw DC charger with my current setup.

Edit: Thanks for the replies. If 25kw isnt possibel, would it make sense to get a seperate 7kw home charger? Would that mean that during off peak/free energy periods, I can top up my home battieries from the grid whiles charging my car (theoretically pulling 8kw to charge batteries + 7kw to charge my car), but have the home charger pull from the battery during peak hours if needed?

Hi Guys,

Can we daisy chain sig power sensors? Coudn't find any information regarding dasiy chaining power sensors.

Can we do that and whats the procedure?

Thanks in advance!!