diy solar

diy solar

Charging situation and battery soc

No. try -2
Ok, Anyway I trust your competence, unfortunately I don't get into my head of this calculation of Mvolts etc. I attach the latest changes I just put into production based on what you wrote to me and I hope I set the battery well. Also yesterday evening due to bad weather I turned off everything except the fv and the battery which had a residue of 14%. Today at 3 pm with a slightly variable day I saw that it accumulated 760 watts, compared to 1,100 previously. I attach the configuration to have your approval! Thank you for all the indications that regardless of the technical side, you were very kind for indicating these parameters to me in such an elementary plant. I also left the float at 13.80 as you wrote to meAnd boost reconnect 13.00 instead of 13.20.
 

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That is from a Rolls manual. They are different. Would stick with 14.50.
Hi, I wanted to update you on the latest events based on the parameters you recommended. This morning I left only the battery charged without any load, on the way back I found it in float (16.30 am). It charged only 500 watts versus 1100 charging normally. The parameters are for recapitulating:

Boost charge 14.50

Float 13,80

Reconnect boost charge 13.00

Time boost 180 mn.

Variation with temperature sensor -4

It seems that despite being very low the battery (1% soc), it had 8 hours to be able to ask the controller for electricity. Today was not very sunny, but I didn't find such a low charge value.

What do you think?

The right battery to remember, is only 2 months old.
 
Hi, I wanted to update you on the latest events based on the parameters you recommended. This morning I left only the battery charged without any load, on the way back I found it in float (16.30 am). It charged only 500 watts versus 1100 charging normally. The parameters are for recapitulating:

16.30am? Do you mean 4:30 in the afternoon?

500W? Do you mean Watt-hours? Do you normally have a load present? If you have a load present, the regulator must provide the energy for the loads AND recharging the battery.

Do you have this chart for today?

1664664619352.png

Also include the Cur and Power tabs.


Boost charge 14.50
Float 13,80
Reconnect boost charge 13.00
Time boost 180 mn.
Variation with temperature sensor -4

It seems that despite being very low the battery (1% soc), it had 8 hours to be able to ask the controller for electricity. Today was not very sunny, but I didn't find such a low charge value.

1% SoC? Show me the voltage chart
 
1% SoC? Show me the voltage chart
Allora , il soc al mattino era 1% , ho accesso il carico verso le 16 PM e come si vede in tabelle aveva caricato durante il giorno solo 0,51 .
To be clear, is the battery without load, from 8.00 AM to 16.00 PM, is it possible that it has charged 0.51 and remained without load in float with 67% soc?
 

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Last edited:
Si probab
Sorry, but unfortunately the translation in Italian creates misunderstandings. I see 0.51, which were absorbed by the battery exactly from 8.00 in the morning to 16.00 in the afternoon with nothing connected, only the panels. In other similar conditions or almost low battery in the morning, I left all the time from 8.00 to 16.00 charging with a total accumulation of 0.92 against 0.51. I don't quite understand these values so low, it seems that the battery after not even half its capacity has decided to stop absorption.
 
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