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Kilowatt Power

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Kilowatt Power last won the day on October 20 2020

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    Nairobi, Kenya
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    Renewables, Power Electronics, Linux, Javascript,

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  1. Greetings, I came across this post touching on Hoymiles microinverter wireless export management using an Efergy transmitter (FSEMTS), CT sensor (FSEMMS) and DTU (FBIADTUEL). Where as I can get Efergy sub-metering kit (transmitter & CT) online, Hoymiles China does not manufacture FBIADTUEL DTU. Their DTU-Pro (WiFi) talks to Chint meter DDSU666 via RS485. With respect to FBIADTUEL DTU, is it a South African only product or a discontinued Hoymiles DTU? Thanks.
  2. There's also the option of heating water using a wind turbine as explained here. Good for those cold windy nights.
  3. I'm faced with the same dilemma with 12V monobloc Eastman tall tubular gel OPzV batteries manufactured by Eastman Auto & Power (India) The rather impressive specifications (attached) state a cycle life of 1500 cycles @ 80% DOD, excellent PSOC recovery and an equalisation charge of 14.8V. Should I really enable setting 33 on the Axpert MKS 3K-24 with the defaults? Not sure.
  4. How did this go? I'm planning on using an SDM230-Modbus energy meter with an InfiniSolar V III 3K for 100% self-consumption.
  5. Greetings, Has anyone analysed the simulated sine wave of the Voltronic Power Lobo 1.2K/2.4K inverter w/AVR using an oscilloscope? Is the waveform a modified square wave or multi-step sine wave?
  6. @___ I tried just that, though inadvertently and no surprises so far going into a year (I touch wood). Initially I had 2x315W Yingli panels in parallel on an Axpert MKS 3K-24 (PF1) with 600W/75Vdc MPPT. I then added another 2x315 panels that were lying around. That is a whopping 1260Wp on just a 600W MPPT (oversized by 101.6%) Using a clamp meter, I measured roughly 4.56A from each of the 4 panels at noon and recorded the following PV parameters on the Axpert display: 630W, 37V and 17.55A. @Coulomb, could it be that the Axpert MKS 3K-24 will take a maximum of 630W irrespective of how large an array is oversized?
  7. Found a couple of 345Wp in the last couple of minutes. Other than these we mostly have 405, 450, 460 and 465 panels.
  8. Greetings, Can I connect 2x405Wp panels for a total of 810Wp in 1S2P configuration on the Axpert MKS 3K-24 (PF1) without any issues? Inverter SCC specifications are Voc 75Vdc, Max PV array power 600W, MPPT range 30~66Vdc and Max PV charge current 25A. Jinko Cheetah HC 72M panels STC/NOCT specifications are Pmax 405/306Wp, Vmp 42.0/39.8V, Imp 9.65/7.72A, Voc 50.1/48.7V and Isc 10.48/8.22A General guidelines here and other forums [FAQ 5] advocate maximum 12.5-20% oversizing but I cannot find panel sizes between 350Wp and 375Wp. Thank you.
  9. They are up for auction - "as is, where is" basis. Shall not bid above current scrap battery prices i.e. US$ 0.50/kg
  10. Hi, I stumbled upon 48 pieces, 2V 400Ah Huawei Agisson TCB-400A batteries in the original box that have been sitting in a customs bonded warehouse since November 2017 i.e. 39 months! The only mention I've found on the Internet about these batteries is in the Huawei PowerCube 1000 (telecom site power supply) user manual. Lead acid battery experts here, is it worth putting these batteries into service or should I assume they are sulfated after staying slightly over 3 years without charge? Shall be happy to hear from you. Thanks.
  11. Hi, I'm finding the description of GST18 inverter AC-in and AC-out terminal points in the Victron manual a bit confusing The manual states the following: AC Output: The terminal points are indicated clearly. From left to right: ‘N’ (neutral), earth, and ‘L1’ (phase). AC Input: The terminal points are indicated clearly. From left to right: ‘L1’ (phase), earth, and ‘N’ (neutral). To cut a long story short, which GST18 pin is "L1" and "N" for AC-in and AC-out respectively top to bottom?
  12. Great. Just wondering, is the 3.6kW 20.5kg in weight? Logically it should be slightly lighter than the 5kW unit.
  13. The spec sheets show otherwise. Same general data like the 5kW i.e. cooling fan, noise <30db, 20.5kg weight and 580x330*208mm size.
  14. Have a look at this Three Phase to Single Phase technical publication by Carroll & Meynell Transformers Ltd
  15. Not yet but just about to. Getting the actual switch (without IP66 enclosure) directly from the manufacturer in Austria, BENEDICT GmbH You could probably get the same switch from the South African distributor, DEEBAR (PTY) LTD
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