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Rick H Parker

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Reply with quote  #31 
Let see
2 * 192V * 38ah  = 14.59 Kw-hours of storage.
1 * 192V * 65ah =  12.48 Kw-hours of storage.

He is offering you 85% of the storage capacity of 2x (16x 38Ah).

You would need 1 X (16 X 76ah) to to get the same capacity as 2x (16x 38Ah)

Just do the math 1 X 16 X 76 = 2 X 16 X 38 ....

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Rick H Parker
Kansas, USA
Electronics Engineering Technologist

marco.rc.santos

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Reply with quote  #32 

I know he is offering less, but that's what he has. And here it's hard to find these types of batteries, so I'll ask for a partial refund and we'll settle. Here the renewable energies are a very small market that is slowly dying with the current economical crisis, due to the wrong general mindset, so I want to set up the system as quick as I can, because I don't know when it will get better and the suppliers start coming back (or the ones here start receiving new equipment).
This is Africa, sometimes this type of compromising is the only option...
Rick H Parker

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Reply with quote  #33 
I think, I got it.  The vendors in Angola don't want to invest in inventory until they are confident there will be a market for it. So best grab what you can when you can. Sure explains the urgent to get a balanced system this time.
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Rick H Parker
Kansas, USA
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marco.rc.santos

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Reply with quote  #34 

Exactly!
There were some vendors who took the chance in the past, when it was easy to get inventory here, but people just weren't into renewables. And when the crisis started they went bankrupt.
My solar panels were the last ones sold to the public by that store. They said they were only into big contracts from then on, as they would import only after the contract was signed, guaranteeing their revenue.
Rick H Parker

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Reply with quote  #35 
Companies will replace their electric forklift battery bank when the capacity drops to where they cannot run the forklift for 8 hours+ per charge. It not enough capacity for their use but still a lot of capacity. You can often get a good deal on the used battery bank from the companies that supply fork lift batteries. Most are wired for 12V, 24V, 36V or 48V but they can be rewired for 192V just look for a bank that has multiples of 16 in the battery bank.

There will be a supply of these for as long as there are electric forklifts running .....

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Rick H Parker
Kansas, USA
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marco.rc.santos

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Reply with quote  #36 

Hi to all!

So I finally succeeded to replace the batteries to 16x 65Ah and installed the 192V solar charge controller.
The controller charges the batteries, but I still have the smoke detector in the room going off, even with some ventilation, so I suspect the batteries are gassing. This doesn't happen when the batteries are being charged by the UPS and, in this case, the charging current is lower (maximum 1A) but the voltage rise on the batteries is quicker than when charging with the solar charge controller.
As far as I read, the VRLA batteries shouldn't normally gas, but I'm wondering if it's normal to do some gassing on the first charges maybe... This is the second day I have the solar charger connected and still have the same issue.

Can I please have your thoughts on this one? Thank you.

Rick H Parker

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Reply with quote  #37 
VRLA batteries shouldn't normally gas

Overcharging a VRLA wiil decomposed the electrolyte.

If have both the UPS and Charge controller connected to the battery bank, the charging profiles and perimeters of both must match. Also you need to make sure the total current from both does not exceed the maximum charging current of the batteries.

What is the charging profile and perimeters programed into the charge controller?
What is the charging profile and perimeters programed into the UPS?
What is the charging current of each?






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Rick H Parker
Kansas, USA
Electronics Engineering Technologist
marco.rc.santos

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Posts: 13
Reply with quote  #38 

I don't have access to the charging profile and parameters of the UPS, I just know that the maximum charging current is 1A.
Attached are the charging parameters and profile of the charge controller. Yesterday I recorded the charging current and it reached a maximum of 8A, on a bright sunny day.
One hour ago I cycled through the views of the controller and found a VPV value varying between 229V and 236V, while the battery voltage was 214V and room temperature 30ยบ C.
The controller is now powered OFF.

Attached Images
png Charging settings.png (53.19 KB, 9 views)
png Charging profile.png (200.80 KB, 10 views)
jpeg VPV.jpg (2.03 MB, 9 views)

Rick H Parker

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Reply with quote  #39 
What is the make and model number of the batteries?
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Rick H Parker
Kansas, USA
Electronics Engineering Technologist
marco.rc.santos

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Posts: 13
Reply with quote  #40 
You can find the batteries' labels attached.

Attached Images
jpeg Novo Documento 11_15.jpg (495.78 KB, 6 views)
jpeg Novo Documento 11_16.jpg (392.31 KB, 6 views)

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