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Thank you for the great forum, Safe Driving over the weekend. Sincerely Jason


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spark88 last won the day on April 17

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  1. So the cloud coverage data isn't really that reliable, but I have the left the information in the dashboard ... however I've been busy with a few other things. Primarily I want to limit how much I draw from my batteries, so I built in a "Limit Battery Discharge Feature". Thanks @deapsquatter for the help. It kind of operates like ESS Optimised mode, except that: 1) I control how much juice I want to draw from the batteries. 2) I can set the level of juice used based on the SOC. 3) I can set different juice usage levels for day and night 4) If I hit my minimum level, then I set a recovery period for the battery So in effect it gives priority to the Grid and then the batteries, and doesn't drain the batteries super quick when there is a heavy load. TODO: Make sure that the batteries get a full charge at least once a week.
  2. awesome ... thanks @plonkster. I seem to be well within all the parameters, which is good to know.
  3. Calling on all the battery guru's out there. Does anyone have a best practice for Lithium Battery (I have Dyness) .... specifically if used with Victron. Things I'm thinking of: - What is the most damaging factor for your battery (would it be temperature ? If so what is a safe range ?) - Would it be better to drain the battery slowly over a longer time than high load over a short time ? - Would it be better to slowly charge it, vs pumping as much as you have into it ? - Recommended DOD ? - Should you charge the batteries to full 100 SOC at least X times a month ? Or is it ok to leave it at say 80% Just some of my thoughts ... please feel free to add others.
  4. OK ... so added a little weather information. I check the cloud forecast for tomorrow. Based on that I'm controlling how much I use from the battery during the night. Just a trial at the moment to see if it has any benefit.
  5. Ok ... load shedding info added.
  6. Quick update ... I added ESS mode now.
  7. So since I've setup my blue install I have come across node red ... awesome is all I can say. Last night I hacked together a little UI with some information that I wanted to see. It also shows the grid status and announces if the status of the grid changes. On the configuration tab I've added manual switching of relays on the venus for a start. I'll of course add to this as I go along and update here. Things on the road map: - See if I can use sun forecasting to determine how much I discharge the batteries at night - There are certain things I want to control given the various states my system is in - Add a button to control modes of ESS if needed (rather than having to go through the menus on the Venus) NOTE - Victron actually has a node-red ready version of Venus OS. Super nice, but I found as soon as I start using the UI it kills the performance of the venus. NOTE - It was night time when I took the pic, hence no PV The flows are available from here: https://github.com/sparkmark/victron_node_red
  8. Sure you already have an answer, but just in case here is what I do: I use the json parser node to convert to a js object, then a change node to 'move" msg.payload.value to msg.payload As an example
  9. Very cool ... will have a look at this. Have been thinking about something like this to try and work out how far I can discharge my batteries during the night before. i.e. if sunny we can drain more
  10. Hi Jay ... what number can I reach you on ?
  11. Hey all, As I have some time to burn with the lockdown, I'm busy setting up my PV panels on our tiled roof. At the moment I'm busy with all the brackets. So far so good ... all pretty straight forward stuff. I'm planning ahead, and I'm trying to work out the best way to handle all the strings that need to come down from the panels. Around the whole roof we have a gutter and all the gear is located 2 stories below in the garage, so I'm kinda limited to take things into the roof. So was thinking about the following setup: Mount a junction box to the roof brackets somehow. From the junction box run some flexible conduit to the MC4 connectors on the panels to give me the most protection on the panel side From the junction box use flexible conduit, hooking up to the main conduit that rests in the gutter. It will run in the gutter until the point where I need to bring it down to the MPPT's Any other thoughts ? Pics would be great too. Thanks Mark
  12. I should just point out for the settings above I have the 9.6 kWh battery (4 x 25A)
  13. Hey all ... I reached out to Dyness (China) for the settings required and battery cable configuration. I got a response the next day which was great. ---------- You need to make sure that the dip switch on the master battery is 0010. This is the default on battery from the factory. Make sure to update you Venus firmware to at least 2.42 For the can bus use : CAN-bus BMS (500 kbit/s) Make up a cable as per below: If all works well, then you should see "Dyness-L Battery" appear as a device on the Venus On the Venus set the following: Goto Settings -> System Setup -> Battery Monitor and choose "Dyness-L Battery on CAN-bus" Goto Settings -> DVCC -> Turn on DVCC Goto Settings -> DVCC -> Enable "Limit Charge Current" Goto Settings -> DVCC -> Set maximum charge current = 100A Goto Settings -> DVCC -> Turn OFF SVS Goto Settings -> DVCC -> Turn ON STS Goto Settings -> DVCC -> SCS should show as Disabled (External Control) On the Inverter set the following: Battery type = Lithium Charge Curve = Fixed Bulk Voltage: 53.5 Float Voltage: 51v Sustain Voltage: 49v Absorption Voltage: 52v Absorption Time: 1hr Cut off Voltage: 46v DC Input low shutdown: 44v DC Input low restart: 48v DC Input low pre-alarm: 48v Dynamic Cut Off Values: 46v (all options) Restart off-set: 1.2v Checking The Configuration Goto Dyness-L Battery -> Parameters. If the battery is fully charged then CCL should show as 0.0A and DCL as 120A (30A per battery). This means that the battery is talking to the Inverter Here is a list for other SOC's Hope this helps someone. Mine seems to be working well now.


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