question

mediacut avatar image
mediacut asked

UPS mode information for EasySolar

Hello,

I install my EasySolar 5kw since september 2018 whit 4 x VRLA GEL 220 AH in a 48V system.

Because i use system whit ESS whit mode "Optimized (whit battery life)" and i set SOC on 80% i need some info about what is the best settings for my setup. The GEL battery will be damage if works in this mode? I ask this because daily battery are charged and discharged to SOC 80%. Based on Victron manual this type of battery it's not designed to use in daily cycle so i'm a little confused, because my installer set in this mode.


In ESS is other mode "Keep batteries charged" that works as UPS, but after battery is charged to 100%, and "Feed-in excess solarcharge power" is disabled, all solar power is lose. If i enable this function, solar power is send to grid and also to my home.

Because i don't have 2 way grid meter i can't turn on this function. It's other way to use this system as a UPS and also send all solarpower to my home consumption?


We wait the electricity company to install 2 way meter, but this needs time.


ESSEasySolar All-in-Oneups
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3 Answers
wkirby avatar image
wkirby answered ·

Where did you see this information about GEL batteries?
80% is probably a good choice for daily cycling, then for grid failure they can go to 20%. You don't want to cycle them down to 20% every day, that will not be good.

https://www.victronenergy.com/upload/documents/Datasheet-GEL-and-AGM-Batteries-EN.pdf

The best way to make ESS power go into the house only and not to the grid is to get your installer to install a grid meter at the incoming supply and tell ESS not to allow energy beyond the meter (meter will read 0W).

If you have not already then you can have a good read of the ESS Design manual and make some more choices from there.

https://www.victronenergy.com/live/ess:design-installation-manual

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Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Please see the answer here about the current Keep Batteries Charged behaviour:

https://community.victronenergy.com/questions/5898/ess-shuts-of-pv-power-in-keep-batteries-charged-mo.html

I will also update the FAQ documentation here while this limitation exists:

https://www.victronenergy.com/live/ess:design-installation-manual#faq

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mediacut avatar image
mediacut answered ·

Hello,

Thank all for fast answer. My Installer made an update and some settings and now UPS mode keeps baterry at 100% and PV power is sent to grid and to home.

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