Generator or Inverter for residential use?

InternetLuddite said:
Thanks chaps. So I guess once you start with a brand stick with it. Feels like a Nikon vs Canon thing brewing up only for Sony to come and make you regret your investment in the other :p
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diff batteries are for example in different cell configuations, so their charge and discharge rates will be different. also can the bms of the one talk to the other etc
 
InternetLuddite said:
So if the first battery is 5Kw and second one is 3Kw then essentially, I only then get 6Kw of usable battery. I lose the 2Kw on the first one. Good to know.

Leads to another question then. Is it better to buy big batts .e.g 5Kw, or stick to smaller ones (which end up costing more e.g. 5 x 2.4Kw as opposed to 2 x 5KwH) I guess having multiple batteries leads to more complexity in wiring, etc but at the benefit of being more easy to replace dud batteries if that happens.



Good to know . Thanks never even knew that.


Thanks chaps. So I guess once you start with a brand stick with it. Feels like a Nikon vs Canon thing brewing up only for Sony to come and make you regret your investment in the other :p
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No as in you'll only get 3kw
 
Lupus said:
No as in you'll only get 3kw
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Wait, but surely if I start with 5 kWh battery and then add 3 kWh battery, I had initially thought I would have had 8 kWh of usable capacity but then I understood you to mean the sum total would be capacity of smallest battery added to system so total would be 6 kWh (3 kWh (of 5 kWh battery)+ 3 kWh) . Am I still getting it wrong? And sorry in advance for me being a dufus
 
signates said:
Going to be selling my efergy E2 energy monitor soon. Been serving me well for the past 3 years prior to me getting ready for my solar setup.

Sensor is attached to the supply at the meter and monitors the whole house. You could attach to a single device to monitor individual items.

It's not the online one. You have to download their software and connect it to a computer to download the usage.

Same as this one.

Click to expand...
Hacked mine with an esp to send data to mqtt
 
InternetLuddite said:
Wait, but surely if I start with 5 kWh battery and then add 3 kWh battery, I had initially thought I would have had 8 kWh of usable capacity but then I understood you to mean the sum total would be capacity of smallest battery added to system so total would be 6 kWh (3 kWh (of 5 kWh battery)+ 3 kWh) . Am I still getting it wrong? And sorry in advance for me being a dufus
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Isn't that how voltage works? Looks like you are confusing things and Yes you are getting it wrong, it just becomes the sum of all kWhs that are connected together.
 
Steamy Tom said:
O_o
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I mean yes it'll become 8kwh in parallel, but it's a bad idea. Different internal resistance, different draw can also lead to the 3kwh getting really hot.
Rather keep capacity the same, so in reality you'd rather only draw 3kwh so there's no stress on the bank. Though maybe non lead acid batteries won't have issues.
In series it should go to 3kwh, and is even more is a bad idea, as if you're monitoring the wrong battery load you could try overload the 3kwh
 
Lupus said:
I mean yes it'll become 8kwh in parallel, but it's a bad idea. Different internal resistance, different draw can also lead to the 3kwh getting really hot.
Rather keep capacity the same, so in reality you'd rather only draw 3kwh so there's no stress on the bank. Though maybe non lead acid batteries won't have issues.
In series it should go to 3kwh, and is even more is a bad idea, as if you're monitoring the wrong battery load you could try overload the 3kwh
Click to expand...

O_o
 
Lupus said:
I mean yes it'll become 8kwh in parallel, but it's a bad idea. Different internal resistance, different draw can also lead to the 3kwh getting really hot.
Rather keep capacity the same, so in reality you'd rather only draw 3kwh so there's no stress on the bank. Though maybe non lead acid batteries won't have issues.
In series it should go to 3kwh, and is even more is a bad idea, as if you're monitoring the wrong battery load you could try overload the 3kwh
Click to expand...
I think it is possible to do it with lithiums and their intelligent battery management systems, I think I read something about that somewhere.
 
guys it is a 48V system he is referring to here, no matter how he stacks it it will be 48 in parallel with 48 with 48 with 48 etc. and yes you can't just mix and match, the pylontechs can pair the 2.4 with the 3.5, but i am not aware if you can do it with the rest.

but say you buy for example 1 x 3.5kW pylontech now, you can add another 2 later to make it 10.5 total, it will be 3 batteries in paralel.

you cant just mix and match anyway so you would not be putting a 8kW battery with a 3kW battery, even if you did though you would be pulling over the total bank.

we aren't talking about 12/24V LA/GEL/AGM batteries here where you mismatch strings for example.
 
What is a conbini box that has a hangover switch and a 120A battery fuse holder and 2 Main circuit and the battery?
 
adielk said:
What is a conbini box that has a hangover switch and a 120A battery fuse holder and 2 Main circuit and the battery?
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A combiner box is where all your pv strings are fused and join up to go to the charge controller

A hanger switch with fuses is your battery fusing

The 2 main circuit must be the in and out breakers for the inverter

A battery is a battery

These things are all separate things
 
Steamy Tom said:
guys it is a 48V system he is referring to here, no matter how he stacks it it will be 48 in parallel with 48 with 48 with 48 etc. and yes you can't just mix and match, the pylontechs can pair the 2.4 with the 3.5, but i am not aware if you can do it with the rest.

but say you buy for example 1 x 3.5kW pylontech now, you can add another 2 later to make it 10.5 total, it will be 3 batteries in paralel.

you cant just mix and match anyway so you would not be putting a 8kW battery with a 3kW battery, even if you did though you would be pulling over the total bank.

we aren't talking about 12/24V LA/GEL/AGM batteries here where you mismatch strings for example.
Click to expand...
Okay that makes a bit more sense, 48v system with lithium's would work I guess
 
Steamy Tom said:
guys it is a 48V system he is referring to here, no matter how he stacks it it will be 48 in parallel with 48 with 48 with 48 etc. and yes you can't just mix and match, the pylontechs can pair the 2.4 with the 3.5, but i am not aware if you can do it with the rest.

but say you buy for example 1 x 3.5kW pylontech now, you can add another 2 later to make it 10.5 total, it will be 3 batteries in paralel.

you cant just mix and match anyway so you would not be putting a 8kW battery with a 3kW battery, even if you did though you would be pulling over the total bank.

we aren't talking about 12/24V LA/GEL/AGM batteries here where you mismatch strings for example.
Click to expand...
what happens when the 2.4 gets empty before the 3.5?
 
Steamy Tom said:
A combiner box is where all your pv strings are fused and join up to go to the charge controller

A hanger switch with fuses is your battery fusing

The 2 main circuit must be the in and out breakers for the inverter

A battery is a battery

These things are all separate things
Click to expand...
Thanks combiner box Was wondering what the hell it is
 
Steamy Tom said:
guys it is a 48V system he is referring to here, no matter how he stacks it it will be 48 in parallel with 48 with 48 with 48 etc. and yes you can't just mix and match, the pylontechs can pair the 2.4 with the 3.5, but i am not aware if you can do it with the rest.

but say you buy for example 1 x 3.5kW pylontech now, you can add another 2 later to make it 10.5 total, it will be 3 batteries in paralel.

you cant just mix and match anyway so you would not be putting a 8kW battery with a 3kW battery, even if you did though you would be pulling over the total bank.

we aren't talking about 12/24V LA/GEL/AGM batteries here where you mismatch strings for example.
Click to expand...
My apologies, this is what I was referring too in my original post (very unclearly).

I had looked at the pylontech, Dyness, etc systems as an 'all in one' systems, where to increase total capacity, one just has to add another unit to existing battery bank .

The voltage , balancing of bat capacities (internally) was not to be concerned about and a big side benefit of buying one of these over the normal AGM/Gel batteries.


Last question (for now ). is it mandatory (electrical compliance, etc) to split the DB into essential and non essential loads? My aim with the system, is that eventually, it will sustain full house incl oven, etc . I can use home automation, to automatically prevent heavy draw items from turning on if running on battery or e.g. 80% of inverter capacity is being reached. I know it can be done.

I am busy investing for example, installing something like this for the stove circuit , I already have Sonoff pow r2 on geysers and pumps, etc (and working well for last two years now)

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