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Someone recommend them to me a day or two ago. I phoned them to check on stock availability, they answered pretty quick, and answered my question immediately.
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Right - so something like: https://www.geewiz.co.za/batteries/5320-royal-delkor-ns40-35ah-deep-cycle-battery-12-volt.html And something from https://www.communica.co.za/pages/search-results-page?q=12v+battery+charger&page=3 It seems we're looking at close to 2k - am I costing this right?
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Ack - the Asus wants 19v - so it's either go to a 24v system, or a step up convertor. probably a stepup - this one https://www.botshop.co.za/product/150w-boost-converter-dc-dc-step-up-module/ Conversion efficiency: 94% (measured at Input 16V, output 19V 2.5A) - probably less @ 12v to 19v.
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So, what I'm hearing people here say is something like: Mains ==> battery charger ==> 12v Battery ==> buck converter (If needed) ==> fuse ==> connector for router/ont etc. I have questions 😉 I think a lot of answers depend on load so lets define that: 1x switch (Dlink DGS-1008A) - 4.8w max 1x ont (Huawei EchoLife HG8040H ) - 7.5w max 1 x AP ( Asus 86U ) - 15w max 1x Raspberry pi 3b+ - 2w max So - I'm looking at around 30w, and want it to last for 4.5 hours (stage 4 in my area). So the battery needs to 30w * 4.5w * 2 (don't want to discharge it more than 50%) = 270 watt hours / 12v = 22AH. (Yeah - I've ignored inefficiencies as well - so, lets jack up the battery requirement to 30AH just in case). Assuming my back of the envelope calculations are right - what charger, and what battery would people recommend? (We probably need to factor in the fact that in the load 4 schedule, we sometimes only have 11 hours of charging time before the next cycle.) I'm curious as to what the fuse setups would look like as well? A bonus question - how would one monitor the performance of this setup - I get battery levels from my ups - I'm guessing I could monitor the battery level via the pi somehow?
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You have a source? Gauteng preferably? my google fu is not revealing something with stock at the moment.
