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--- drafts:dynamic_ess [2024-03-20 16:19] – [Can I use it? | Eligibility Criteria] dfaber
+++ drafts:dynamic_ess [2024-05-15 08:38] (current) – [Step 1: System] dfaber
@@ Line 45: / Line 45: @@
 Note that this is part is setting the capabilities, not actually setting limits for the system to use. See [[#qwhy_does_the_system_exceed_the_configured_power|here]] for info on setting limits for the system.
+Then you need to set the operating mode:
+  * Green mode:
+    * Only sell surplus solar back to the grid after consumption and battery charging
+    * Energy in battery is reserved for consumption
+    * Charge battery when prices are low
+  * Trade mode:
+    * Always sells surplus solar back to the grid
+    * Energy in battery is used to trade
+    * Charge battery when it is beneficial for trading
+You can always adjust this mode at a later stage, so pick the one that best suits your needs.
 ==== Step 2: Battery ====
@@ Line 215: / Line 228: @@
 We are aware that the provider Octopus offers day ahead pricing, but as these are not offered via the ENTSO-E API, we are unable to process those. Eventually we will probably support these prices, but will take some time.
-Also in the UK, (fixed) prices are known to change at the half hour instead of the whole hour (where our system works with). The work-a-round is to add the average price of in the overlapping hour. So if the price changes from 40 cents to 20 cents at 16.30, fill out a price of 30 cents from 16.00 - 17.00.
+Also in the UK, (fixed) prices are known to change at the half hour instead of the whole hour (where our system works with). The work-a-round is to add the average price of in the overlapping hour. So if the price changes from 40 cents to 20 pence at 16.30, fill out a price of 30 pence from 16.00 - 17.00.
 Adding better support for this will eventually be done, but as this also affects graphs and the scheduling, it might take a while.
@@ Line 295: / Line 308: @@
 ==== Q: My country is not using the Euro, how do I switch currency? ====
-At the moment that is not possible yet, but we are working on adding it to the general settings per site.
+Under the //Settings -> General// part of your site, you can set your currency.
 ==== Q: My providers changes price at the half hour instead of the full hour ====
@@ Line 320: / Line 332: @@
 At the moment this is not possible. If we decide to add it, it will first be added to the [[https://flows.nodered.org/node/victron-dynamic-ess|Node-RED implementation]] first.
-==== Q: Can you give an example with calculations? ====
-{{:drafts:dess-example-energy-prices.png?nolink&800|}}
-Given a system at 15% SOC that has set the battery costs to 0.06 €/kWh, energy prices right now (11.00) set at € 0.29 and becoming € 0.40 this evening. Why would it feed into the grid already and not wait until the prices are higher?
-The battery cost is € 0.06 per kWh. This means that for a cycle of battery usage to be useful (financially beneficial) the price difference should be at least € 0.12 cents per kWh (€ 0.06 for charging, and € 0.06 for discharging). € 0.40 - € 0.29 is € 0.11 which is below that, hence Dynamic ESS does not want to use the battery for this task, instead it is offloading the excess to the grid.
 ==== Q: I am getting the alarm "Dynamic ESS error code: No matching schedule available" ====
@@ Line 365: / Line 372: @@
 Note that the dashboard should show: //Last updated:// **Realtime**
+==== Q: I get the error message "Dynamic ESS error code: Battery capacity unset" ====
+This error can happen when the Dynamic ESS system starts before we were able to communicate the battery capacity from VRM to the GX device. It will go away as soon as you restart Dynamic ESS or the GX device.