If the power goes out, the charger turns off and the battery supplies the current. The charger just needs to supply more watts than you are consuming (in your case very little) and it will properly charge the battery while running the load. In your case, I would just buy a high end battery charger that is very efficient like the Victron and then use a DC to DC converter to regulate the output at exactly 12V and plug that into your router (assuming it operates at 12V) and not use an inverter at all. In order to reduce that, I bought a Victron DC to DC converter that will convert the battery voltage to a regulated 12V to run my NAS. The only problem I had is that it uses 20% more electricity because of the inefficiencies of multiple AC to DC conversions. The Victron inverter also has very low standby consumption. I chose Victron because the stuff is very well made, designed for boats and campers that need high reliability and constantly running. So I built a "homemade" online UPS using a Victron battery charger (Blue Smart IP22 12V 30A, 94% efficient, $200), Victron phoenix inverter (200watt, $110) and Chins battery 12V 100AH LiFePO4 ($300). This eventually turns off my network rack even though I have power coming from my automatic whole house generator. My cheap line-interactive UPS does not like it and constantly flips on and off battery until the battery is dead when running on generator. However I was looking at a much more expensive double conversion UPS ($600-$700) because I have a whole house generator that is somewhat large (~20kW model) and when the electrical load is small, the generator control system can't tightly control the frequency and it varies from 59-61Hz. My constant draw was about 115 watts for my network including a NAS, router, POE switch, POE cameras, etc. purpose built UPS and came to the conclusion that "homemade" was far superior. The third option is use double or four aught -2/0, 4/0- copper wire, and unfortunately, my wallet is allergic to paying for cabling thicker than my arteries.Įvery item in an electrical circuit will have a cost, an upkeep charge in a way, so the simpler and cleaner your circuit, the more efficient it will be, assuming it's properly designed. You can reverse it back to the original with another set of components on the other end. For example, common transformers are wound 10-100, so 12vdc 2amps going in (primary wonding) would become 120vdc 0.2a (secondary winding). Using a transformer which roughly translates wire wraps into voltages by ratio. If I have to ship power even 100ft it's either (ie from panels, so starting DC) invert(make AC), convert (back to DC, those terms are specific btw) or its transform it to HV. Yea, boss, if any item needs DC, the only reason to change it is if you have to ship it down a long line.ĪC travels distance without racking up as much loss, noticably better than DC. No memes (pictures with superimposed text), shit postsĬomplete rules: /r/batteries/about/rules/.If asking a question, ask the actual question, fully yet concisely, right in the title.Be civil: do not insult no all-caps, no excessive "!" and "?", please. Dangerous or damaging (tasers, EMP, vaping).Organic spam from cell and battery manufacturers.Education and safety about batteries and related technologies.Pictures or cells, batteries, power banks, UPSs.Cell, battery, and BMS recommendations and comparisons.Discussion and questions about cell chemistry.Repairing batteries, power banks, UPSs, or BMSs.Battery, power bank, or UPS design help.Replacing a battery / battery cell in a product.For questions, news, and discussion about batteries, cells, chargers, charger/inverters, power banks and UPSs.
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