Installing a UPS

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Installing a UPS

Postby WillF » Wed Feb 11, 2015 10:44 am

Hi. I am very new to solar power and have limited understanding of electricity so I am after some help/guidance. I have recently acquired a UPS free of charge :D that I would like to use to power my house in the evenings after the sun goes down and have no idea if it is appropriate and how to go about it. The UPS is a Reillo SDL 6000 producing 6000VA and 4200W. I have a 4.5kW solar system and export more energy than I use but recently my feed in tariff has been reduced to 6.5c so not so much. Can anyone give me any advice or point me in the right direction to find out more information for myself?

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Will
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Re: Installing a UPS

Postby davidg » Wed Feb 11, 2015 1:00 pm

WillF wrote:Hi. I am very new to solar power and have limited understanding of electricity so I am after some help/guidance.

I looked at the specs, The voltage is quite high 192VDC that legally requires a sparky to be involved for an external battery pack. The batteries it has internally will not supply power for very long. I wonder what it's conversion efficiency is like? UPS's are not really designed for this sort of work but. They can be made to work so that they can provide power over longer periods, however a good working knowledge of electrical systems, battery management and UPS's is needed.

I'm guessing you want to somehow ensure that the power produced is channeled to the UPS first before export. A UPS is not designed to be able to "support" Grid-inverter.

However there is very long thread about Off-Grid and off-grid inverter modifications "Powerstar W7 Inverter modification" worth spending the time reading.

Or you could simply start with a product that does it correctly out of the box, ie Selectronic SP-Pro setup in Hybrid mode and configured for generic grid-connect inverters and suitable battery system. 8-)
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Re: Installing a UPS

Postby Gordon-Loomberah » Wed Feb 11, 2015 2:40 pm

A gift of something that doesn't really suit the purpose can be more trouble than it is worth.

How many AH can it deliver with its existing battery? You'll need to test that- easy with a simple plug-in energy meter.
What is the idle (no connected load) current?
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Re: Installing a UPS

Postby davidg » Wed Feb 11, 2015 3:30 pm

Gordon-Loomberah wrote:How many AH can it deliver with its existing battery?

The STD battery configuration as follows
Capture.JPG

Small capacity good as UPS for xx minutes. ;)
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An OTT Genset for a house.
PVOutput Stats

Sparkys light up your life :)
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Re: Installing a UPS

Postby Gordon-Loomberah » Wed Feb 11, 2015 3:43 pm

Hmm, I can see stand-by power usage making that storage capacity, and no doubt it is much less than rated due to old batteries, virtually worthless for what Will wants to do!
Lots of money to spend- really you would be better starting from scratch with the correct gear.
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Re: Installing a UPS

Postby WillF » Wed Feb 11, 2015 7:39 pm

Thanks for the replies. I thought it might be the case that it is not as useful as I first thought although the process has made me interested in exploring a few other options. Now I just need to find another duty for the UPS....

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Re: Installing a UPS

Postby GaryJonassen » Thu Feb 19, 2015 1:47 pm

If you can make the UPS noise free (no beeps or annoying fan noise) when there is no power coming in (no mains) then you might look at putting in a basic timer that cuts off the mains power at say 5pm and then back on at say 11am the next morning. This would then charge up the UPS during the peak solar times. You could then run something that would consume that stored power during the night. Things that don't matter so much if the UPS runs out of juice or the timer fails. I have done this for night TV viewing where the UPS will supply about 3hrs of power - enough for News and a movie on my 250w (measured 170w to 300w depending on the brightness of the show thats on) LED screen.
Remember this is not that efficient and the UPS draws power in running itself, and if you need to turn on the mains to complete the evening activity, can consume more that you save.

Chose something that you know is consistent and wont consume all the UPS (fish tank pump or lights?)
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