Generator or Inverter for residential use?

AchmatK

AchmatK

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adielk said:
Because no power from grid. Just batteries and panels?


Pity not in a position to install pv panels yet. But guess removes hassle of registering
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No panels. Just batteries. Didn't get a chance to put up the last eight panels.
 
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Saba'a

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m.polity.org.za

Power tariff set to rise to 128c/kWh in 2021 after Eskom wins Nersa battle over R69bn equity injection

In a scathing judgment made on July 28, the court has declared as illegal the National Energy Regulator of South Africa’s (Nersa’s) decision to deduct a R69-billion equity injection into Eskom from its allowable revenue for the period 2019/20 to 2021/22, but has also instructed that the full...
m.polity.org.za m.polity.org.za


Power tariff set to rise to 128c/kWh in 2021 after Eskom wins Nersa battle over R69bn equity injection




Does this mean pv panel prices will increase
 
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wingnut771

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adielk said:
m.polity.org.za

Power tariff set to rise to 128c/kWh in 2021 after Eskom wins Nersa battle over R69bn equity injection

In a scathing judgment made on July 28, the court has declared as illegal the National Energy Regulator of South Africa’s (Nersa’s) decision to deduct a R69-billion equity injection into Eskom from its allowable revenue for the period 2019/20 to 2021/22, but has also instructed that the full...
m.polity.org.za m.polity.org.za


Power tariff set to rise to 128c/kWh in 2021 after Eskom wins Nersa battle over R69bn equity injection




Does this mean pv panel prices will increase
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that tariff looks cheap, wish i didn't have to go through a greedy municipality.
 
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Saba'a

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I'm told with the 2 x 3.5kw batteries, can only get about 5KV? Even though inverter rated at 8KV.
 
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Steamy Tom

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adielk said:
I'm told with the 2 x 3.5kw batteries, can only get about 5KV? Even though inverter rated at 8KV.
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well 2 x 3.5 is 7kW, and on the pylons i think they are rated for like 80% discharge? so thats what like 5600W? plus the internal BMS uses power and losses etc.

the inverter rating is kind of irrelevant to some degree here, total available sorted energy is not the same as usage.

i.e i can have 10kWh sorted, and use it at a rate of 10kW for one hour, or i could use it at a rate of 1kW but for 10 hours?

think of it like, powerful car with gas tank of 50L, vs economical car with tank of 50L

edit: i think you are maybe referring to max draw, you should look at the batterys max, off hand i think it was like what 74A, so you can work it out, max amps x 48V = x
 
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thehuman

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Nov 2, 2004
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signates said:
Really impressed with this inverter.

Now that the CT sensor is connected, the inverter can pick up the power from the grid and can determine the load before the inverter.

I've set it now to limit the output to the house and not just to load and aux output of the inverter.

This pic shows the power the battery is providing to the inverter and how the inverter is distributing the power to the load and house and nothing back to the grid.

Arrows show the direction of the electricity.

It's still combining the aux and load output but will get this resolved in due course.

Technically there is now 3 outputs active in the inverter.

The grid input is now being used as an output to supply loads before the inverter like my outbuilding with pool pumps and well pumps.

The second output is the normal essential load output.

And the third is the aux output for non essential loads like my geyser and aircons. View attachment 884100
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It now grid tied inverter with zero export option.
Could maybe switch aux loads between grid and aux with an mains/ generator switch if they can't solve it
 
Sinbad

Sinbad

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Steamy Tom said:
well 2 x 3.5 is 7kW, and on the pylons i think they are rated for like 80% discharge? so thats what like 5600W? plus the internal BMS uses power and losses etc.

the inverter rating is kind of irrelevant to some degree here, total available sorted energy is not the same as usage.

i.e i can have 10kWh sorted, and use it at a rate of 10kW for one hour, or i could use it at a rate of 1kW but for 10 hours?

think of it like, powerful car with gas tank of 50L, vs economical car with tank of 50L
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You guys are conflating capacity with power.

1596209649159.png
7kWh, yes. However you need to consider the maximum discharge current of the battery. The US3000s are rated at 37A continuous, 74A peak (but this will reduce their life).
37A x 2 = 74A x 38V = 3552W.
 
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Steamy Tom

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Sinbad said:
You guys are conflating capacity with power.

View attachment 884584
7kWh, yes. However you need to consider the maximum discharge current of the battery. The US3000s are rated at 37A continuous, 74A peak (but this will reduce their life).
37A x 2 = 74A x 38V = 3552W.
Click to expand...

i just edited, i think i get what he meant now and agree with you
 
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