Author Topic: Solar Upgrade AGAIN  (Read 90418 times)

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Offline EEVblogTopic starter

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Re: Solar Upgrade AGAIN
« Reply #175 on: August 20, 2024, 01:03:23 am »
Installing the two extra 440W solar panels into a Hoymiles microinverter connected to the Generator port on the Deye Hybrid Inverter

 

Offline darkspr1te

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Re: Solar Upgrade AGAIN
« Reply #176 on: August 20, 2024, 08:02:26 am »
Re: power out on generator feed


I spoke to a local Deye retailer on the subject and he was not 100% sure but said it could be that it's outputting a small amount for the generator to synchronize to , if the input is disabled then that signal should disappear. he does not have that model so we could not check for the option (here in africa they sell different models)


darkspr1te


 
 

Offline Siwastaja

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Re: Solar Upgrade AGAIN
« Reply #177 on: August 20, 2024, 08:14:16 am »
LiFePO doesn't have the same exothermic runaway reaction as lithium ion.

LiFePO4 is li-ion, and it very much has the exact same exothermic runaway reaction as other common li-ion cathode chemistries. Onset temperature is higher and amount of released energy smaller, but the risk is still very real and thermal runaways of LiFePO4 packs commonplace, especially with hobbyists and manufacturers who get the false sense of security of the "safer" cathode material and therefore lack other ways of quality control and safety (passive and active).

Demonstration videos of single LiFePO4 bricks not catching fire when shorted are not relevant when in application many of them are stacked together so that more heat is localized during failure, easily exceeding the ~350degC or so thermal runaway onset temperature.
« Last Edit: August 20, 2024, 08:17:44 am by Siwastaja »
 

Offline EEVblogTopic starter

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Re: Solar Upgrade AGAIN
« Reply #178 on: August 21, 2024, 12:15:10 am »
I spoke to a local Deye retailer on the subject and he was not 100% sure but said it could be that it's outputting a small amount for the generator to synchronize to , if the input is disabled then that signal should disappear. he does not have that model so we could not check for the option (here in africa they sell different models)

Thanks.
Correct in that if you disable it the value drops to zero.
84W is lot of power though, and I can't imagine where that is being dissipated. Can't be inside the Hoymiles inverter, that just seems implausible.
If there is genuinely 84W being pissed away at night then I certainly don't want that. Someone has suggested I could use Home Assistant to order the Deye to disable the gen input after operational hours. But that's a kludge.
 

Offline EEVblogTopic starter

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Re: Solar Upgrade AGAIN
« Reply #179 on: August 21, 2024, 11:34:37 am »
Troubleshooting the mystery 84W

 

Offline EEVblogTopic starter

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Re: Solar Upgrade AGAIN
« Reply #180 on: August 22, 2024, 04:47:45 am »
And POOF, just like that the mysterious 84W Generator Power on the Deye has vanished.
No idea what I did, except leave it off for half the day.
 

Offline EEVblogTopic starter

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Re: Solar Upgrade AGAIN
« Reply #181 on: August 26, 2024, 07:08:43 am »
Impressive day
 

Offline EEVblogTopic starter

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Re: Solar Upgrade AGAIN
« Reply #182 on: September 22, 2024, 08:21:21 am »
Emergency power output installed.
 
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Offline EEVblogTopic starter

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Re: Solar Upgrade AGAIN
« Reply #183 on: December 24, 2024, 04:21:56 am »
Looks like my Hoymiles 800W microinveter has died on the 11th Nov and I only now just noticed.
Either that, or the Deye generator input is doing something strange.
Tried power cycling the thing and nothing. Don't really want to go on the roof right now and remove the panels, might have to wait until next year.
I do have a 4 input version of the Hoymiles I can swap in to test if needed.
 


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