If it doesn't get hot, it could be bolted to a plastic project box, along with the switch and fuse block. If you want to find out how hot it will actually get, to know what you can mount it on safely, you can use an IR thermometer gun (or your fingers if you don't mind the slight risk of a burn). At 27 amps the 30amp atc fuse holders/fuses got so hot that you couldnt touch them, the 30 amp shortstop breakers get warm but you can keep your fingers on them.Ĭlick to expand.The resistor shoudln't be hot very long, as it wont' be in operation more than however long it takes to charge the caps in the inverter. The 30 amp namebrand breakers work great and can handle the higher amps without heating up and I use them between my solar controller and battery which sees a constant of 27 amps. I also tried using "shortstop" circuit breakers but you have to use namebrand breakers, I bought generic 30amp breakers and they were tripping at 22 amps. These require a ANL fuse holder (about 10 dollars). Also the fuse holders probably max out at 30 amps and they also start melting when use constantly at 30 amps.įor situations where I need high amps constantly I have been using ANL fuses, they are larger and can handle the amps better without melting. Some of the atc fuses have a tendency to melt from the heat, this usually occur as low as 15 amps, I now use bussman atc fuses which can handle the heat better without melting. (13a x 26v = 338 Watts) I have note measured the current directly. Assuming 77% efficiency instead, the inferred current on the 13 volt side would be 26 amps. The estimate of 25 amps at 13 volts is based on assuming 82% efficiency for the entire chain. The power for that comes from a Victron Phoenix 375 VA inverter which is powered from the 13 volt source with about 25 amps on the input (13 volt) side of the inverter). * The project involves a Jackery E1500 Li-ion battery system which is being charging at 260 Watts. So any advice about what is safest, most prudent, best, etc., is most welcome. I know next to nothing about fuses and I have very little experience. Is that necessary? The total length of wire is just about 5 feet. If I just replace the 30 amp with a 40 amp blade fuse in the same in-line fuse holder, I was concerned that maybe the fuse holder would tend to heat up and that might be bad? I wondered if it might be more prudent to go with 40 amp bolt-down type fuse such as Baomain ANL 40 amp in a Baomain holder, or a Little fuse 40 amp Mega or.? I could mount that fuse in a small switch box that I use to precharge the inverter. The fuse holder felt warm to touch and so I wondered if I should just replace that fuse with a 40 amp, or if I need to make more fundamental changes such as using a different fuse type and lower gauge (bigger) wire? (Something I got on Amazon that happened to have the connectors I wanted on both ends and seemed like it might work okay? (pictured in the reply below.)) Anyway, after about 40 minutes one of the fuses was blown. I am using 10 AWG wire with 30 amp blade fuses in in-line fuse holders on the 13 volt wires. I am working on a project where an inverter draws about 25 amps* continuously from a 13 volt battery-based source.
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