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New installation - decision made


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OK, I'm going to bite the bullet.

1 x Goodwe GW5048D-ES

2 x Pylon US2000B Plus Li-Ion Batteries

1 x Battery Cabinet 9U ( 4 x Pylon ) to allow for later expansion

20 x JA Solar 330W POLY 5BB Panels (potential 6600 Watts)

Assorted cables, mounting brackets, fuses, isolaters, etc.

What major item am I missing?

 

 

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2 hours ago, Antony said:

OK, I'm going to bite the bullet.

1 x Goodwe GW5048D-ES

2 x Pylon US2000B Plus Li-Ion Batteries

1 x Battery Cabinet 9U ( 4 x Pylon ) to allow for later expansion

20 x JA Solar 330W POLY 5BB Panels (potential 6600 Watts)

Assorted cables, mounting brackets, fuses, isolaters, etc.

What major item am I missing?

 

 

R121,500.00 including delivery.

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32 minutes ago, SilverNodashi said:

2x Pylontechs might not be enough for your load?

Hi (ho) Silver

I considered 4 x Pylontechs, but that will just break the bank completely and I can always add 2 at a later stage.

It is purely for essential loads in living area like fridge, LED lights, TV, DSTV, ADSL Router.

I also switch off non utilised ccts come bedtime. Even considering include the fridge in the ritual as well.

If essential load exceeds battery, or battery reaches 60%, I will have to pull from grid for now, but ideally I want to manage within the capacity.

The heavy loads (washing, ironing, etc) will only be used during daytime. The majority of my consumption is during the day.

I have already conditioned the household to move into this mode.

Cooking and space heating, guest bathroom/kitchen geyser already on gas, main geyser is being replaced on Friday with solar (tubes).

Underfloor heating in bedrooms, hairdryers, oven and other high consumption items on a separate DB circuit straight from grid.

Edited by Antony
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6 hours ago, Antony said:

Hi (ho) Silver

I considered 4 x Pylontechs, but that will just break the bank completely and I can always add 2 at a later stage.

It is purely for essential loads in living area like fridge, LED lights, TV, DSTV, ADSL Router.

I also switch off non utilised ccts come bedtime. Even considering include the fridge in the ritual as well.

If essential load exceeds battery, or battery reaches 60%, I will have to pull from grid for now, but ideally I want to manage within the capacity.

The heavy loads (washing, ironing, etc) will only be used during daytime. The majority of my consumption is during the day.

I have already conditioned the household to move into this mode.

Cooking and space heating, guest bathroom/kitchen geyser already on gas, main geyser is being replaced on Friday with solar (tubes).

Underfloor heating in bedrooms, hairdryers, oven and other high consumption items on a separate DB circuit straight from grid.

Two Pylontech's will give about 210W over 19 hour period. With those exact same loads (but with LTE + MikroTik routers, instead of ADSL, and no DSTV), my house averages on about 350Wh during the night. 

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9 hours ago, SilverNodashi said:

Two Pylontech's will give about 210W over 19 hour period. With those exact same loads (but with LTE + MikroTik routers, instead of ADSL, and no DSTV), my house averages on about 350Wh during the night. 

mmm... so 4 Pylon's will give me 420W?

If I go that route I will have to cut on something :(

Edited by Antony
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10 hours ago, SilverNodashi said:

Two Pylontech's will give about 210W over 19 hour period

OK hang on. These things have a continuous discharge rate of 25A (peak 100), so you have 50A at roughly 50V, or 2500W continuous. Sure, it's only 4kwh, and if you want to go with the 60% DoD at which they rate their cycle life that means a mere 2.4kwh, or 200W over 12 hours (so base load overnight is just doable). Am I missing something?

Edit: I can't remember if its 2kwh usable or 2kwh total on these units. Don't shoot me :-)

Edited by plonkster
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7 minutes ago, plonkster said:

OK hang on. These things have a continuous discharge rate of 25A (peak 100), so you have 50A at roughly 50V, or 2500W continuous. Sure, it's only 4kwh, and if you want to go with the 60% DoD at which they rate their cycle life that means a mere 2.4kwh, or 200W over 12 hours (so base load overnight is just doable). Am I missing something?

Edit: I can't remember if its 2kwh usable or 2kwh total on these units. Don't shoot me :-)

Usable capacity is 2200

http://www.pylontech.com.cn/pro_detail.aspx?id=114&cid=23

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1 hour ago, plonkster said:

OK hang on. These things have a continuous discharge rate of 25A (peak 100), so you have 50A at roughly 50V, or 2500W continuous. Sure, it's only 4kwh, and if you want to go with the 60% DoD at which they rate their cycle life that means a mere 2.4kwh, or 200W over 12 hours (so base load overnight is just doable). Am I missing something?

Edit: I can't remember if its 2kwh usable or 2kwh total on these units. Don't shoot me :-)

The manufacturer works on 48V, so in his case he has 4800Wh, and 4000Wh to work with. Divide that by 19 hours and you get 210.53W. 

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Duck, stone coming ...

Why would one want to "cut on something" and spend more on batteries, if you could just connect more loads to Eskom or switch more loads off, if possible?

IF there was Eskom failures, different story, otherwise Eskom is cheaper.

And less we forget, batts must be bought with cash, or the ROI becomes even worse.
And even bought cash, it is a long stretch to make the ROI AND they are going to need replacement one day, again.

For me I look at batts as penny wise and pound foolish i.e. save pennies on Eskom (we think it is wise) by spending big bucks on batts.

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Just now, The Terrible Triplett said:

Duck, stone coming ...

Why would one want to "cut on something" and spend more on batteries, if you could just connect more loads to Eskom or switch more loads off, if possible?

IF there was Eskom failures, different story, otherwise Eskom is cheaper.

And less we forget, batts must be bought with cash, or the ROI becomes even worse.
And even bought cash, it is a long stretch to make the ROI AND they are going to need replacement one day, again.

For me I look at batts as penny wise and pound foolish i.e. save pennies on Eskom (we think it is wise) by spending big bucks on batts.

that picture is about to change, as they're introducing yet another price hike. 

But, with Pylontech's you often get out at the same price, or a bit cheaper, than Eskom, if brought with cash / card, and not a loan. 

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10 minutes ago, SilverNodashi said:

... as they're introducing yet another price hike. 

Good point. How I have been combating the increases over the years, is to switch more stuff off, the WANTS vs NEEDS thing.

The 12am-6am, when all are asleep, are the loads I have started to seriously target lately. 

So my long term plan: Once I am down to the bare bare minimum, cannot go lower, and the T105RE's are done, and Lithium's have improved even more, as they found with a electron microscope more info on how to make them even better, then I would most definitely buy batteries and replace Eskom.

But today it is a WANT, not a NEED, as I am still wrangling with the "loads" (read the family) to go lower.

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16 minutes ago, SilverNodashi said:

that picture is about to change, as they're introducing yet another price hike. 

But, with Pylontech's you often get out at the same price, or a bit cheaper, than Eskom, if brought with cash / card, and not a loan. 

I think the design-problem comes in when power interruptions kick in. You want most everything to run off of the solar during the day, most everything to run off of Eskom during the night, but just some stuff to stay on battery when Eskom goes down.

 

I guess its possible to do it manually (switch off stuff when Eskom goes out) but is it possible to have it automatically like that? Daisy-chain 2 inverters with the second one feeding your vital equipment which is also the only inverter connected to the batteries?

 

-G-

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5 minutes ago, gallderhen said:

I think the design-problem comes in when power interruptions kick in.

Jip, it does.

Therefor I went the Multigrid route, as it has 2 outputs.
One that goes off when the power goes. AC-out2
The other output AC-out1, connected to a separate DB, is then powered from the batts.

But even with the above, if there is a failure and no solar, we still switch the WANT's off to not strain the batts to much / keep the NEED's powered longer.

So to this effect when I go to bed I switch off a bunch of WANT's in case there is a failure (I forgot to buy power), that the NEED's can run comfortably the entire night.

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2 hours ago, SilverNodashi said:

 

Hi Silver,

How are you surviving on 4kW running the whole house and still charging the batteries?

  • 3Kw PV array consisting of 12x 255W Renesola panels in 4x3 strings
  • 4KW Axpert invert feeding whole house with Eskom backup for night time use
  • 16x 6V122Ah batteries in 2 banks, fused, for backup purposes
  • Raspberry Pi for monitoring
    14 hours ago, SilverNodashi said:

    Two Pylontech's will give about 210W over 19 hour period. With those exact same loads (but with LTE + MikroTik routers, instead of ADSL, and no DSTV), my house averages on about 350Wh during the night. 

     

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6 minutes ago, KLEVA said:

@AnthonyThe 4KW rating of the Axpert only indicates it's capability, not what he is using at any one time.

Good point, and adding to that, something of not running continuously at more than 80% of inverters rated capability.

Edited by Guest
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5 hours ago, The Terrible Triplett said:

Good point. How I have been combating the increases over the years, is to switch more stuff off, the WANTS vs NEEDS thing.

The 12am-6am, when all are asleep, are the loads I have started to seriously target lately. 

So my long term plan: Once I am down to the bare bare minimum, cannot go lower, and the T105RE's are done, and Lithium's have improved even more, as they found with a electron microscope more info on how to make them even better, then I would most definitely buy batteries and replace Eskom.

But today it is a WANT, not a NEED, as I am still wrangling with the "loads" (read the family) to go lower.

Don't take this the wrong way, but sometime the wants VS needs argument need to rest as well. In most households, keeping the fridge(s) on and the food fresh is a want. Keeping the security lights, alarm, internet router, etc is a need and not a want. I don't want to, in the middle of the night, when my child is sick, fiddle with a torch to try and push open a garage door and gate to rush him to hospital. At some point in time we all use a minimum base load of about 200wh

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3 hours ago, Antony said:

Hi Silver,

How are you surviving on 4kW running the whole house and still charging the batteries?

  • 3Kw PV array consisting of 12x 255W Renesola panels in 4x3 strings
  • 4KW Axpert invert feeding whole house with Eskom backup for night time use
  • 16x 6V122Ah batteries in 2 banks, fused, for backup purposes
  • Raspberry Pi for monitoring

     

We don't use 4Kw all the time. In fact, we try and stick to 2.5Kw during the day, with expections every now and then

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9 minutes ago, SilverNodashi said:

fridge(s) ... security lights, alarm, internet router, etc  ... garage door and gate 

All NEEDS boet, all needs. About 100w if you are lucky - as that is where I got it down to.

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53 minutes ago, SilverNodashi said:

We don't use 4Kw all the time. In fact, we try and stick to 2.5Kw during the day, with expections every now and then

WOW, hats off! I've used 12kWH since 5am this morning with load spikes over 6kW. Its washing day :mellow:

Edited by Antony
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