240v inverter

New to renewable energy? Have questions? Here's a great place to ask them and view information about wind and solar power basics.

Re: 240v inverter

Postby cfinlay96 » Fri Feb 10, 2017 11:57 am

Would a bad cell cause the problem though?
cfinlay96
Solar Supporter
Solar Supporter
 
Posts: 12
Joined: Wed Feb 08, 2017 11:15 am

Re: 240v inverter

Postby Gordon-Loomberah » Fri Feb 10, 2017 12:13 pm

It may well be contributing to the problem, but you do tend to get what you pay for with inverters, and a good 2kW inverter will cost 10X or more than what yours cost. I'm sure the 2kW rating will be rather optimistic, and its voltage regulation may be terrible, and highly susceptible to battery voltage sag, even for a fraction of a second.
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
User avatar
Gordon-Loomberah
Community Moderator
 
Posts: 5359
Joined: Thu Sep 24, 2009 10:41 pm
Location: Loomberah NSW Australia

Re: 240v inverter

Postby cfinlay96 » Fri Feb 10, 2017 1:22 pm

Just tested the voltage output of the inverter and it is only 188v so that is probably my problem!
cfinlay96
Solar Supporter
Solar Supporter
 
Posts: 12
Joined: Wed Feb 08, 2017 11:15 am

Re: 240v inverter

Postby Gordon-Loomberah » Fri Feb 10, 2017 1:48 pm

ouch, that could damage the fridge compressor over time.
I bet the waveform is some horrible spiky thing too, as it is a 'modified sine wave' inverter, so it will be pretty rough on some motors.
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
User avatar
Gordon-Loomberah
Community Moderator
 
Posts: 5359
Joined: Thu Sep 24, 2009 10:41 pm
Location: Loomberah NSW Australia

Re: Battery

Postby Bthree » Fri Feb 10, 2017 3:53 pm

Good info here...
Gordon-Loomberah wrote:Have a read through this, there is lots of useful info about connection methods and various other useful battery info:
http://www.smartgauge.co.uk/batt_con.html



Bad thing to do here, you are running two threads on the same problem.... bit naughty
Network = Powercor .. Retailer = Origin .. Installed Christmas 2008
Latronics PV-1200 feed by 8xTrina TSM DC-01 .. 170watt = 1360watts DC in .. 1096watts AC out .. 5+years later 990watts ac out
Bthree
Solar Crusader
Solar Crusader
 
Posts: 428
Joined: Thu Sep 24, 2009 11:14 pm
Location: NorthWest Victoria

Re: Battery

Postby Gordon-Loomberah » Fri Feb 10, 2017 4:03 pm

I agree, but that's easily fixed :)
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
User avatar
Gordon-Loomberah
Community Moderator
 
Posts: 5359
Joined: Thu Sep 24, 2009 10:41 pm
Location: Loomberah NSW Australia

Re: 240v inverter

Postby jules » Fri Feb 10, 2017 4:22 pm

Incredible wave of the wand Gordon but maybe you could combine in cfinlay's 1st thread where he gives some specs for his system like a fridge that uses 250W?

Just tested the voltage output of the inverter and it is only 188v so that is probably my problem!


What's the battery voltage when you're getting 188V from the inverter? From what you've said earlier the batteries seem to be struggling, which could explain the low AC output voltage, though the inverter should really cut-out before that happens. Also, something has to grow in the generation [and battery storage] side of your system or something needs to shrink on the consumption side of your system. Maybe 1.5 kW of panels or a fridge that uses ~50 W, which is quite possible. The efficiency [read power loss] of your inverter will matter because you have to have it on 24/7 for the fridge. Even when nothing else is happening you could be using 50W just having it on standby.
Primary system: .8KW Trina panels; Plasmatronics PL40; 1,000Ah VRLA 12X2V battery bank; 1.7KW Selectronic inverter

Veteran system, semi retired: 6 X 55W Solarex 12V panels; Fangpusun CC; 6 X 2V, 35 year old 550Ah lead acid flooded cell batteries.
jules
Solar Crusader
Solar Crusader
 
Posts: 261
Joined: Fri Aug 17, 2012 2:32 pm
Location: Port Macquarie, NSW

Re: 240v inverter

Postby Gordon-Loomberah » Fri Feb 10, 2017 4:59 pm

That's what I did Jules, see p1 :)
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
User avatar
Gordon-Loomberah
Community Moderator
 
Posts: 5359
Joined: Thu Sep 24, 2009 10:41 pm
Location: Loomberah NSW Australia

Re: 240v inverter

Postby jules » Fri Feb 10, 2017 5:37 pm

OMG Gordon and I didn't see your hands moving at all :D
Primary system: .8KW Trina panels; Plasmatronics PL40; 1,000Ah VRLA 12X2V battery bank; 1.7KW Selectronic inverter

Veteran system, semi retired: 6 X 55W Solarex 12V panels; Fangpusun CC; 6 X 2V, 35 year old 550Ah lead acid flooded cell batteries.
jules
Solar Crusader
Solar Crusader
 
Posts: 261
Joined: Fri Aug 17, 2012 2:32 pm
Location: Port Macquarie, NSW

Re: 240v inverter

Postby cfinlay96 » Sun Feb 12, 2017 2:44 pm

So even with the battery at 28.5 the output of inverter is still only 188ish. 2 batteries are sitting slightly higher then the other 2.
cfinlay96
Solar Supporter
Solar Supporter
 
Posts: 12
Joined: Wed Feb 08, 2017 11:15 am

PreviousNext

Return to Q&A - wind and solar power basics

Who is online

Users browsing this forum: No registered users and 2 guests

new solar power specials