Networks Concede One Third Of Consumers Could Go Off Grid

Financial support for wind and solar power in Australia - rebates, grants and feed in tariffs - can be a nightmare in navigating all the rules and regulations. Ask your questions and view related information here.

Re: Networks Concede One Third Of Consumers Could Go Off Gri

Postby tom rickard » Sat Dec 19, 2015 4:23 pm

I think if you could afford it, going off-grid would be easier than on-grid.

If I had the cash, i'd get the following:

2 of Sunny Island 8.0
approx. 15kw PV, and 3x5kw Sunnyboys.
2 of LG Chem Resu 12.8kwh storage units (or similar that talk directly to the Sunny Island)
Cummins-Onan (or similar) diesel 6(ish)kw generator

Get a pro to wire it all up, (and they'd love you for it as it would be the simplest Lithium install they ever did), and you'll have a system with good redundancy, and easy serviceability.

Problem is it will cost a lot more than staying on the grid. It's only when you DIY with mismatched components that things get complicated, albeit significantly cheaper.
tom rickard
Solar Evangelist
Solar Evangelist
 
Posts: 99
Joined: Tue Nov 26, 2013 2:32 pm

Re: Networks Concede One Third Of Consumers Could Go Off Gri

Postby davidg » Sat Dec 19, 2015 11:02 pm

tom rickard wrote:If I had the cash, i'd get the following:

2 of Sunny Island 8.0
approx. 15kw PV, and 3x5kw Sunnyboys.
2 of LG Chem Resu 12.8kwh storage units (or similar that talk directly to the Sunny Island)
Cummins-Onan (or similar) diesel 6(ish)kw generator

Would much rather use Selectonic with ABB or Kaco thanks. The heartache stories I've had from a few other people with SMA in SPS particularly with VFD's is one I'd rather stay away from if at all possible thanks.
Off-grid/Hybrid System Specialist - Store Sun to use later- I Do!
SELECTRONIC SPMC-482 7.5kW, 8.2kW's of Arrays
AC-Coupled Grid-Connect Inverters,
2100Ah 48V Bank

Auto Backup Genset
PVOutput Stats

Sparkys light up your life :)
User avatar
davidg
Solar Crusader
Solar Crusader
 
Posts: 1918
Joined: Sat May 05, 2012 7:38 pm
Location: Dandenong VIC- *Really don't like Power Retailers at all.

Re: Networks Concede One Third Of Consumers Could Go Off Gri

Postby tom rickard » Sun Dec 20, 2015 12:58 pm

I would love more details on what problems have arisen with the Sunny Island's frequency control of the Sunny Boy in an off-grid application. Not being a professional, my research base is limited, I have only spoken directly to a few other people worldwide who are using an SMA system in the way I intend to. Between them they know of many other applications and the only advice I have is to ensure firmware is "matched" between systems (something that I've heard is also a problem with Selectronic systems). The good thing I have found with the SMA is that even for a D.I.Y'er, the information (even to the detail of the comms protocol for the BMS) is available.

I did look into the Selectronic/Kaco system earlier, and rang Selectronic Australia to ask for their input on how my BMS would "control" the system, they weren't interested in providing information. I'm not saying it's not a good system but as a D.I.Y person, It certainly looked a lot more difficult to implement than the SMA.

The obvious problem with a LiFePo4 system and an A/C coupled set-up is getting the BMS to tell the master inverter to throttle back the slave(s). This is a plug-in option with the Sunny-Island. I'm not sure how it works with the Selectronic.
tom rickard
Solar Evangelist
Solar Evangelist
 
Posts: 99
Joined: Tue Nov 26, 2013 2:32 pm

Re: Networks Concede One Third Of Consumers Could Go Off Gri

Postby davidg » Sun Dec 20, 2015 9:42 pm

tom rickard wrote:I did look into the Selectronic/Kaco system earlier, and rang Selectronic Australia to ask for their input on how my BMS would "control" the system, they weren't interested in providing information. I'm not saying it's not a good system but as a D.I.Y person, It certainly looked a lot more difficult to implement than the SMA.

The obvious problem with a LiFePo4 system and an A/C coupled set-up is getting the BMS to tell the master inverter to throttle back the slave(s). This is a plug-in option with the Sunny-Island. I'm not sure how it works with the Selectronic.


Actually there is no obvious way of telling it, persay. However they (SP-Pro) is extremely controllable charge/discharge wise and has several digital i/o's with those I've had excellent results controlling the charge etc for LIPO's so called comms is not really all that a big a deal once you understand what the cells need to operate reliably, balance, etc. (that's why Selectronic don't offer any info ATM) although I have asked for a couple specific enhancements that hopefully will appear at some stage.
Off-grid/Hybrid System Specialist - Store Sun to use later- I Do!
SELECTRONIC SPMC-482 7.5kW, 8.2kW's of Arrays
AC-Coupled Grid-Connect Inverters,
2100Ah 48V Bank

Auto Backup Genset
PVOutput Stats

Sparkys light up your life :)
User avatar
davidg
Solar Crusader
Solar Crusader
 
Posts: 1918
Joined: Sat May 05, 2012 7:38 pm
Location: Dandenong VIC- *Really don't like Power Retailers at all.

Previous

Return to Renewable Energy Rebates And Incentives

Who is online

Users browsing this forum: Majestic-12 [Bot] and 2 guests

new solar power specials