coolcarper1
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Yes it is but this has been happening fir a while now, before it got cold so not too sure about what fox said, but does make sense
Solis RHI 6K 48ES 5G Inverter Fox ESS LV5200 Battery - Charging limit ? and export to grid ...
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coolcarper1
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I work in DIY trade and pir Insulation board will be ideal and like Seagal said remove the insulation from below so the heat can come through
re temperatures... "the-other-thread-about-the-same-issue" has just posted some more details on the charge currents vs. temperatures
diysolarforum.com
Solis RAI not charging Fox-ESS LV5200 correctly
Hi all, hoping someone can shed some light on this. My Solis RAI charger is programmed to charge the battery from the grid for 4 hours every night on cheap-rate electricity, but it is not getting much of a charge. Software I have on the computer shows 640W going out to the workshop, where the...
diysolarforum.com
Agree with PIR... my DIY battery box has 100mm of A1-grade fire-resistant celotex around it and some temperature driven low wattage heaters ?
. Sitting at 23 degrees right now, 10 degrees above ambient
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coolcarper1
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Yes celotex and pir board are the same thing just different suppliers, seems strange to use energy to keep batteries warm to be able to save energyAgree with PIR... my DIY battery box has 100mm of A1-grade fire-resistant celotex around it and some temperature driven heat lamps ?
Err... yes, that's why I said I agree re pir
yes and no...
a) LiFePOs are fussy things and like to be same temp as you and me - they live longer at those temperatures and...
b) Capacity at 0 degrees is said to be only about 80% of the capacity at 25 degrees, so a few watts used up keeping them warm is outweighed by the gains in their storage capacity.
coolcarper1
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Very warm?! Personally I have only a tenth of that wattage, which is working well so far, only on about 20% of the time. Obviously if temp controlled it will turn off quickly - not sure how reliable or accurate its own thermostat would be, so I'd add a stc1000 or similar as a backup and display of temperature ?️
coolcarper1
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Not sure what these heat lamps are your using and abviosly it needs to be fire safe fo you have any links or pictures.
Also they do a smaller tube heater with built in thermostat.
Any advice appreciated before I go shopping lol
coolcarper1
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That looks more suitable. Just using resistive heaters - there's a good thread on heaters here...
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It will all depend on the thickness of your pir, volume of enclosure and temperature differentials, as to how much heat you need.
LiFePO4 heating pad for cold temperatures
I think that item will do next to zero to insulate the battery. What I did and several others have done is using 2" XPS rigid foam. In my case I lined the inside of a box with it. It has an R-value (US units) of 10, so it does provide fairly good insulation. If you read through the rest of this...
diysolarforum.com
It will all depend on the thickness of your pir, volume of enclosure and temperature differentials, as to how much heat you need.
I have the boss of the installation team coming out early next week ... the saga continues... I could but won't do a DIY insulated temp controlled heated cabinet .. they can ! or move it ... The data on the post from @ScottishBadger is bang on for what the chap at Fox told me as well...
coolcarper1
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I will hold off too for now. I have sent the Information from our chats to my installer he is now chasing fox for answers as he said none if this Information was passed to them.
Atleast it feels like we are getting closer to sorting this issue.
coolcarper1
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Might be a daft question but if we do have to build a heated cabinet will it need to house the inverter too or just the batteries
No... def only batteries. The Inverter needs to have plenty of space for its natural cooling. Hope the installers gave it the correct amount of space...
see...
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I have had the MD of Envo Energy the Company we bought the installation from - very apologetic, .. but he says this is not a common thing .. BS I called .. pointed him to data and facts on here etc .. data from Fox re battery temps .. He promises a senior technical guy from their company here next week ...
Mean time I have just resurrected an old Temp / humidity sensor and it will be going in loft asap .. then I can track the data and correlate exactly the amp charge rate vs temp ...
Mean time I have just resurrected an old Temp / humidity sensor and it will be going in loft asap .. then I can track the data and correlate exactly the amp charge rate vs temp ...
coolcarper1
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Plenty of room
coolcarper1
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To be fair my installer seemed very taken back by the comments so perhaps fox have not been so open to them.
It would be interesting to put some heat up there and watch them work as they should then we have concrete proof.
ScottishBadger
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The bloke that called me back today stated quite clearly that all installers purchasing from them are given full tech info and data (that isn't in the little installation guides!) to aid them with their installations. This includes charging rate v's temp info, allegedly. I have to say I'm inclined to believe him, as so far, Fox are the only company to actually get back in touch with me to look into this "fault". I can't get through to Solis and I've waited over 8 days for a callback from my installer, although to be fair I got an email direct from someone within the installation company late this afternoon asking me to contact them direct on a mobile number, which I will do on Monday. Could be an interesting conversation......
I have a space-heater in the workshop, it's tempting to go up there at midnight and turn it on and see if the charge rate is any higher at 00:30..... only problem with that is the noise of the heater, my neighbours might not be too impressed, haha.
coolcarper1
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Better to heat it in the morning and see if you get better charge results I would have thought,
coolcarper1
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Here we have 3 screen shots to show the charging limit
6am is 10amp
11am 24amp
Afternoon 100amp
This is for 2 batteries so half that if you have 1
Times are appox
6am is 10amp
11am 24amp
Afternoon 100amp
This is for 2 batteries so half that if you have 1
Times are appox
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coolcarper1
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Can you tell me what heaters you are using pleaseAgree with PIR... my DIY battery box has 100mm of A1-grade fire-resistant celotex around it and some temperature driven low wattage heaters ?
coolcarper1
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I have built a insulated box using 18mm ply lined with 50mm pir board and put a small heater in it with a thermal cut off.
This morning it was reading maximum charge 30amp 15amp per battery.
I turned the heater on and after 4hrs it is still reading maximum 30amp. I'm confused as to why this has not made any difference and can only assume it's because the batteries are enclosed in a metal case or the problem is something else.
The temperature in the box is reading 21.5c
See attached screen shot
This morning it was reading maximum charge 30amp 15amp per battery.
I turned the heater on and after 4hrs it is still reading maximum 30amp. I'm confused as to why this has not made any difference and can only assume it's because the batteries are enclosed in a metal case or the problem is something else.
The temperature in the box is reading 21.5c
See attached screen shot
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coolcarper1
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As a test I have just force charged the system and after running for 5 mins it has now gone to 100a maximum charge.
So it seems that it does not recognise any heat increase until it starts to draw a charge.
So the heating does work but won't register on bms untill the system is drawing a charge.
So it seems that it does not recognise any heat increase until it starts to draw a charge.
So the heating does work but won't register on bms untill the system is drawing a charge.
I can't see anywhere it states the battery temperature
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