I’m able to reproduce the issue by disabling the SOC feed too. The issue seems to be due to if (config.app.battery_soc.value)
still evaluating to true when it has been disabled. For me this then disabled access to the settings view due to the javascript object error.
I raised a ticket on github for you and managed to get access back to the settings view by modifying line 381 in mysolarpvbattery.php to set the optional property to false instead of true. “battery_soc”:{“optional”:false, “type”:“feed”, “autoname”:“battery_soc”, “engine”:“5”, “description”:“Battery state of charge %”},
Hello @neiloakley adding an app to the iOS app requires essentially writing it from scratch on the iOS platform I believe, so a fair bit of work. @mattjgalloway is the developer of the iOS app (and has kindly contributed it all voluntarily).
It might be worth asking if the battery supplier has any python scripts or other code examples for pulling data in from their API that we could work with as a starting point.
Hi Graeme - Having been responsible for adding the discharge logic my concern with calculating time until fully charged, is that charging from 90% to 100% is not linear and can vary a lot from one system to another depending on how charge controllers / rectifiers are set up. I’m happy to look at it, but what rules do you think we should have ? Displaying time until charged to 90% is an option?
Im all for keeping it simple, Its an estimate after all.
Maybe at a start just use the same rules as discharge. Then if its not too much hassle an option to 90% can be added?
On the subject of limits, My battery runs from 100-20%. Am I correct in thinking battery time left assumes 0%?
If i set the battery to 8kwh, as its what I actually use would the time calculation be correct, or would the SoC % be confusing it?
I like the feature. At a glance I can see will i make it to the night rate on battery.
I can see this is brilliant but I can’t see a clear statement of how to set up the various inputs, some of which are different to my current ones for Solar only and some of which are new.
Do I have to use the latest postings from this thread or am I just not seeing it in emoncms.org?
I am trying to create this simulator and it’s not working for me. I try to create the simulator post processor and it does not give me the create button. Please see screenshot. Any idea why this is happening?
Our convention is power/energy imported, generated and used is positive, but exported is negative. So what you’re doing - provided that you separate the battery charge and discharge accurately, looks to be more-or-less correct. I’m not sure that I’d regard battery charge as “use” and battery discharge as “generated” - they are more like “stored”, but the difference, i.e. the losses, is definitely “use” as it ultimately comes out of the system as heat. I think it’s a matter of preference as to how you regard the energy that is stored and subsequently recovered.
Don’t forget that PV has an overnight “keep-alive” consumption that might be confusing the issue.
Thanks, I think I’ve figured it out now, I had to mess around with the feeds a bit to create a use value in the end but it seems to work, and if giving what seems like the correct values.
In my case, I needed to add the grid + solar + battery discharge feeds together, then subtract the battery_charge feed.
Hi @TrystanLea I hope you are still monitoring this thread! I’ve just followed you guide to create my Solar Battery App. All working perfectly, except a couple of things!
I’m trying to get my SOC via an API from my Battery supplier (PureDrive Energy) at the moment it is showing as blank on the app and I haven’t attempted to map the feed. Is that the best approach?
For the Solar_Direct feeed, I can’t find the process called Max_Inp. Am I missing something? I’m using emoncms.org rather than a local version.
Thanks for your help!
Yes I’d say that using the SOC from the PureDrive Energy API is probably the best way to do this, though I dont have any experience with that API to be able to comment about how that can be done.
Emoncms.org supports only a reduced set of input processes at the moment. So Im not sure about the equivalent best way to do that. If you are scripting the SOC can you preprocess that input in your script I wonder?
Thanks for the swift response. I haven’t contacted them yet about getting the API details to bring in SOC so that is a longer term thing.
For the solar_direct, is there a way to script that in? I’m a complete newbie with emoncms, managed to do the feed side and the app but that is about it.
From what I understand, I need solar_direct_kwh for the history to work. Can you tell me how is do that without max_imp?
Many thanks again!
I compute my solar direct usage by subtracting export and battery charge from the overall generation, then “Allow positive” process to discarding anything negative. Works for both watts and kWh, unless you’re charging the battery from the grid, in which case you’ll need to use “Power to kWh” process.
Thanks Tim. That looks good. Only got CTs on Solar, External Supply and Battery so working out how to calculate all the others is a challenge. Fortunately the My Solar Battery app does a lot of the heavy lifting!
