multiplus_faq
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multiplus_faq [2019-01-22 10:16] – external edit 127.0.0.1 | multiplus_faq [2019-10-17 13:48] – [3.1 Derating of the power factor] guystewart | ||
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**AC low disconnect: | **AC low disconnect: | ||
- | On generators where the output voltage drops under load, setting this value to a higher value can help solve shutdowns on overload. | + | On generators where the output voltage drops under load, setting this value to a higher value can help resolve inverter |
- | **AC Low connect:** minimum value: at this value or any higher value, | + | The reason |
+ | If the generator is disconnected under load (either due to low-voltage disconnection, | ||
+ | |||
+ | As overload is driven by current, not power, this can result in an overload. | ||
+ | |||
+ | By increasing this minimum voltage level, you tell the inverter/ | ||
+ | |||
+ | **AC Low connect:** minimum value: at this value or any higher value, the MultiPlus will reconnect after having disconnected (default = 187Vac). | ||
===== 1.4 Maximum voltage levels ===== | ===== 1.4 Maximum voltage levels ===== | ||
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===== 1.5 Loss of mains detection (LOM) ===== | ===== 1.5 Loss of mains detection (LOM) ===== | ||
+ | |||
+ | Loss of mains detection will push and pull at voltage and frequency to see if there is still a generating source. This process can cause issues with some generators, or high impedance connections to generators. | ||
+ | |||
+ | For large and stable Generators Type B LOM will work, and is safer. | ||
+ | However, if you are experiencing issues with voltage, frequency or power fluctuations, | ||
+ | |||
+ | **Disabling LOM** | ||
+ | |||
+ | Disabling the LOM on an input connected to the grid is only allowed when other external safety equipment is installed. | ||
+ | Disabling the LOM on an input connected to generator can be done, but then other methods / warning signs / physical lockout safety measures must be provided. Ensuring that any installer that will work on the generator, wiring or system, will make sure to also switch off or otherwise disconnect the Inverter/ | ||
For Full information on Loss of Mains detection, please see [[ve.bus: | For Full information on Loss of Mains detection, please see [[ve.bus: | ||
- | ===== Example configuration in VEConfigure | + | **Example configuration in VEConfigure** |
* A generator that requires LOM to be disabled. | * A generator that requires LOM to be disabled. | ||
* Generator on AC in 1, and grid on AC in 2, as recommended. | * Generator on AC in 1, and grid on AC in 2, as recommended. | ||
- | {{ :ve.bus:grid-code.png?direct |}} | + | {{::lom_generator.jpg?direct&400|}} |
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{{: | {{: | ||
- | **Derating of the power factor** | + | ===== 3.1 Derating of the power factor |
Some generators have a waveform which makes it difficult to charge with the normal charge mechanism. Through activating the " | Some generators have a waveform which makes it difficult to charge with the normal charge mechanism. Through activating the " | ||
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This leading or lagging power factor will have the effect of demanding more kVa from the generator for the same or less DC Watts delivered to the batteries. You may need to further reduce the DC Current Limit in the Charger tab of VEConfigure if the generator continues to overload after changing this setting. | This leading or lagging power factor will have the effect of demanding more kVa from the generator for the same or less DC Watts delivered to the batteries. You may need to further reduce the DC Current Limit in the Charger tab of VEConfigure if the generator continues to overload after changing this setting. | ||
+ | |||
+ | Effectively, | ||
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A detailed description of all settings is available in the VE-Configure help menu, and more instructions are available in our manuals. | A detailed description of all settings is available in the VE-Configure help menu, and more instructions are available in our manuals. | ||
+ | |||
+ | ====== 4. In the “Inverter” tab of VE-Configure: | ||
+ | |||
+ | ===== 4.1 PowerAssist ===== | ||
+ | |||
+ | The [[https:// | ||
+ | |||
+ | If you have a small generator and have trouble getting connected or staying connected, Disable PowerAssist to allow the device to reduce the AC input current limit. | ||
+ | |||
+ | |||
+ | |||
+ | ====== Still not connecting? ====== | ||
+ | |||
+ | If the unit is still not connecting, switch the Multi over to Charger only mode. | ||
+ | |||
+ | Try with a different generator. | ||
+ | |||
+ | There can be issues with generators with Residual Current Devices (RCD' | ||
+ | |||
+ | |||
+ | If there is still no connection, contact your dealer or distributor. Tell them the steps that you have taken already to attempt to get it to work and they can help from there. | ||
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[[https:// | [[https:// | ||
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+ | [[https:// | ||
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===== DISQUS ===== | ===== DISQUS ===== | ||
~~DISQUS~~ | ~~DISQUS~~ | ||
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multiplus_faq.txt · Last modified: 2024-07-17 06:57 by guy_stewart