multiplus_faq
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multiplus_faq [2019-10-08 03:25] – guy_stewart | multiplus_faq [2020-06-23 06:05] – [Software Changes] mvader | ||
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- | Some generators are more suitable than others for use with inverter/ | + | Some generators are more suitable than others for use with inverter/ |
For example; some things to look for when selecting a generator is a high quality alternator and AVR (auto voltage regulation). | For example; some things to look for when selecting a generator is a high quality alternator and AVR (auto voltage regulation). | ||
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If your generator is smaller than the recommended size for your inverter/ | If your generator is smaller than the recommended size for your inverter/ | ||
+ | If you do want an inverter based generator (eg for noise reasons under lower loading), get one that is at least 30% larger than required than an equivalent AVR based model to help prevent nuisance overloads. | ||
+ | |||
+ | It is also important to look at the DUTY CYCLE rating of the generator. Some generators are marketed for their peak output, but may only be designed to sustain 50% of that peak load rating for longer periods of time. | ||
+ | |||
+ | Battery charging is a very heavy use case load for a generator, so make sure it is up to the job, and the installation has plenty of good airflow and ventilation when operating to allow for heat to dissipate. | ||
+ | |||
+ | Some generators are only designed to operate for several hours, before requiring time to rest and cool down. Make sure this limitation is part of your load profile and system design. | ||
==== Operation ==== | ==== Operation ==== | ||
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- | ==== Software | + | ==== Software |
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Warning: changing these settings will allow to feed-through current that may be of insufficient quality for the electrical requirements of your equipment. | Warning: changing these settings will allow to feed-through current that may be of insufficient quality for the electrical requirements of your equipment. | ||
- | For information on VE-Configure | + | For information on VEConfigure |
- | ====== 1. In the “Grid” tab of VE-Configure: ====== | + | ====== 1. In the “Grid” tab of VEConfigure: ====== |
| | ||
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- | ====== 2. In the “General” tab of VE-Configure: ====== | + | ====== 2. In the “General” tab of VEConfigure: ====== |
{{:: | {{:: | ||
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===== 2.2 AC Input Current Limit ===== | ===== 2.2 AC Input Current Limit ===== | ||
- | The charger on the Multiplus is very powerful. If you have an existing generator that is not able to supply the maximum charging current of the Multi, you will need to adjust the AC Input Current Limit in the General Tab of VE-Configure. | + | The charger on the Multiplus is very powerful. If you have an existing generator that is not able to supply the maximum charging current of the Multi, you will need to adjust the AC Input Current Limit in the General Tab of VEConfigure. |
A reasonable starting point for the AC Current input limit is 80% of the generator capacity in Watts. For example: | A reasonable starting point for the AC Current input limit is 80% of the generator capacity in Watts. For example: | ||
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- | ====== 3. In the " | + | ====== 3. In 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, | ||
**Important note:** | **Important note:** | ||
- | A detailed description of all settings is available in the VE-Configure | + | A detailed description of all settings is available in the VEConfigure |
- | ====== 4. In the “Inverter” tab of VE-Configure: ====== | + | ====== 4. In the “Inverter” tab of VEConfigure: ====== |
===== 4.1 PowerAssist ===== | ===== 4.1 PowerAssist ===== | ||
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====== Still not connecting? ====== | ====== Still not connecting? ====== | ||
- | If the unit is still not connecting, | + | If the unit is still not connecting, |
+ | |||
+ | Check the VE.Bus Monitor and AC Input Connection timer | ||
+ | |||
+ | {{:: | ||
+ | |||
+ | With Multi firmwares xxyy460 and up, VEConfig will indicate why the AC Input is rejected and will also show an indication of the remaining waiting time as a blue bar. | ||
+ | |||
+ | After the waiting time the unit will connect to AC input provided that there is no assistant which prevents the unit from connecting to grid and that the required relay test is performed. | ||
+ | |||
+ | Switch | ||
Try with a different generator. | Try with a different generator. | ||
- | There can be issues with generators with Residual Current Devices (RCD' | + | As troubleshooting and correcting these faults have serious safety implications, |
+ | There can be issues with generators with Residual Current Devices (RCD' | ||
+ | |||
+ | Simplify the AC wiring, With everything safely shut down and tested for voltage, disconnect the AC-Output active, neutral and earth. Direct wire in the generator connections, | ||
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. | 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:// | ||
[[https:// | [[https:// |
multiplus_faq.txt · Last modified: 2024-07-17 06:57 by guy_stewart