Re: [RE-wrenches] LG Chem RESU10 Storage Capacity

[Jerry Shafer]

You may want to check if the battery is part of the LG recall

On Sat, Oct 23, 2021, 5:52 PM Jon Siegenthaler 
wrote:

> Thanks Jerry,
>
> This system was installed in May of 2021. So with just under 6 months of
> service I'm still underwhelmed by the performance. The cycling is
> relatively slow at around 1-.3kWh.
>
> Jerry Shafer
> 
>  Sat,
> 23 Oct 2021 14:00:22 -0700
> 
>
> As the LG battery ages so does its capacity go down, the harder and deeper
> the cycling the faster the downward trend in capacity
> Jerry
> NAPCEP PV Inspector
>
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Re: [RE-wrenches] LG Chem RESU10 Storage Capacity

[b...@midnitesolar.com]

FWIW, I was just looking at the specs for the RESU10  (48V) and it says 
the total kW-Hour is 9.8 kW-Hour

which is at initial stage of life (note 1)

Usable energy says it is good for 8.8 kW-Hour  (note 2)

At first I thought that maybe they just don't let you discharge all the 
way to 0% and/or charge all the way to 100% but

I guess that isn't the case ?


Compatible Inverter Brands : SMA, SolaX, Ingeteam, Redback, GoodWe, 
Sungrow, Victron Energy, Selectronic - More brands to be added
1) Total Energy is measured at the initial stage of battery life under 
the condition as follows : Temperature 77℉

2) Usable Energy is based on battery cell only

boB




On 10/23/2021 5:52 PM, Jon Siegenthaler wrote:


Thanks Jerry,

This system was installed in May of 2021. So with just under 6 months 
of service I'm still underwhelmed by the performance. The cycling is 
relatively slow at around 1-.3kWh.


Jerry Shafer 
 
Sat, 23 Oct 2021 14:00:22 -0700 
 



As the LG battery ages so does its capacity go down, the harder and deeper
the cycling the faster the downward trend in capacity
Jerry
NAPCEP PV Inspector

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Re: [RE-wrenches] LG Chem RESU10 Storage Capacity

[Jon Siegenthaler]

Thanks Jerry,

This system was installed in May of 2021. So with just under 6 months of
service I'm still underwhelmed by the performance. The cycling is
relatively slow at around 1-.3kWh.

Jerry Shafer

Sat,
23 Oct 2021 14:00:22 -0700


As the LG battery ages so does its capacity go down, the harder and deeper
the cycling the faster the downward trend in capacity
Jerry
NAPCEP PV Inspector
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Re: [RE-wrenches] LG Chem RESU10 Storage Capacity

[Jerry Shafer]

As the LG battery ages so does its capacity go down, the harder and deeper
the cycling the faster the downward trend in capacity
Jerry
NAPCEP PV Inspector

On Sat, Oct 23, 2021, 11:53 AM Jon Siegenthaler 
wrote:

> Hey Wrenches,
>
> I have a site with an LG Chem 9.8kW battery. This is coupled with the
> Solaredge Energy Hub. According to the data sheet the battery is listed as
> a 9.8kWh battery and has a usable capacity of 9.3kWh.
>
> On the Solaredge portal for the customer I can download the CSV file for
> the system production and consumption as well as the battery discharge.
> When I add up the kWh on average the battery will feed between 6.6-6.8kWh
> at a DOD of 85-84%. The elevation of the installation is 500ft above sea
> level, the battery is installed in the laundry room in the house where the
> highest temperature is 85°F.
>
> I had spoken to a Solaredge tech about the remaining 15% of the battery
> and if the client could use this portion. He had said that 5% was reserved
> for the inverter to keep operating and 10% was for the battery to stay
> awake/alive. Even with this added 15% as the "reserve" we're seeing nowhere
> near the supposed 7.9kWh. We seem to be missing around 1.3kWh of storage.
>
> On another site I have already had one battery internally explode back in
> July that wasn't on the recall list and am supposed to get the replacement
> in Q1 of 2022. Needless to say I'm less than impressed by LG and their
> under performance. Is anyone else experiencing anything similar with the
> storage capacity?
>
> Jon
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[RE-wrenches] LG Chem RESU10 Storage Capacity

[Jon Siegenthaler]

Hey Wrenches,

I have a site with an LG Chem 9.8kW battery. This is coupled with the
Solaredge Energy Hub. According to the data sheet the battery is listed as
a 9.8kWh battery and has a usable capacity of 9.3kWh.

On the Solaredge portal for the customer I can download the CSV file for
the system production and consumption as well as the battery discharge.
When I add up the kWh on average the battery will feed between 6.6-6.8kWh
at a DOD of 85-84%. The elevation of the installation is 500ft above sea
level, the battery is installed in the laundry room in the house where the
highest temperature is 85°F.

I had spoken to a Solaredge tech about the remaining 15% of the battery and
if the client could use this portion. He had said that 5% was reserved for
the inverter to keep operating and 10% was for the battery to stay
awake/alive. Even with this added 15% as the "reserve" we're seeing nowhere
near the supposed 7.9kWh. We seem to be missing around 1.3kWh of storage.

On another site I have already had one battery internally explode back in
July that wasn't on the recall list and am supposed to get the replacement
in Q1 of 2022. Needless to say I'm less than impressed by LG and their
under performance. Is anyone else experiencing anything similar with the
storage capacity?

Jon
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