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--- ess:design-installation-manual [2020-07-20 14:55] – [9. FAQ] mvader
+++ ess:design-installation-manual [2020-07-29 13:42] – guy_stewart
@@ Line 860: / Line 860: @@
   - When discharge is not allowed -and- loads on AC-Out force the Multi/Quattro to exceed the AC input current limit.  Reasons for not allowing discharge: BMS blocks discharge (DCL=0), or battery SOC level is below the 'minimum SOC' setting in ESS, when SOC is at least 3% above the set level, discharge is allowed again.
   - A grid code is in use that requires the enabling of battery discharging by aux-inputs. Check the used grid-code in VEConfigure and compare with the electrical signals provided to the Inverter/charger in its AUX inputs.
+  - The Loss of Mains detection (LOM) causes issues, often in combination with a high impedance connectivity to the utility. For details see [[ve.bus:grid-codes-and-loss-of-mains-detection|]].
 === Q5: How can I suppress low battery warnings? ===
@@ Line 894: / Line 894: @@
 Switching off in overload, while connected to the grid, is caused by the active Loss of Mains (LOM) detection, linked to the country code as configured in VEConfigure3.
-This behaviour occurs when the AC supplied on the AC-in of the Multi or Quattro is 'weak'. By 'weak' we mean that the AC connection to the utility has a higher impedance than usual. For example a generator, or an old or remote house connected with a too-long and/or too/thin cable to the utility.
+This behaviour occurs when the AC supplied on the AC-in of the Multi or Quattro is 'weak'. By 'weak' we mean that the AC connection to the utility has a higher impedance than usual. For example a generator, or a house connected with a too-long and/or too-thin cable from the Inverter/Charger to the utility.
 For the solution and configuration options, see [[ve.bus:grid-codes-and-loss-of-mains-detection|]].
@@ Line 913: / Line 913: @@
 __Lastly__, check that the rocker switch on the unit is set to On, rather than to Charger-Only. When set to charger-only, the unit refuses to discharge the battery. Note that to check this, you really need to physically check the rocker switch: you can't see its state by looking on VRM or on the GX Device. On a MultiPlus-II, this rocker switch is at the bottom of the unit and needs to be in the I position, not on II.
+__Finally__, if all above didn't help - temporarily disable LOM to make sure that is not causing an issue. Detailes in this document: [[ve.bus:grid-codes-and-loss-of-mains-detection|]].
 === Q10: Why does the system refuse to discharge my battery? ===