Recent content by bob1

I'm just going to leave my inverter connected for now until I upgrade to a bigger system. The parasitic drain from them won't be noticeable right?

Ok and is there a way to calculate or estimate how much lower I can go without the resistor burning up? The reason why I want to calculate everything is because I have to order all my parts, there are no electronic stores near me.

Ok so let me make sure this is correct. First you plug in your battery voltage and desired max safe current to prevent sparking, so V = 14.6 for lifepo4 and I = 5. V / I = R So the resistor must be 14.6/5 = 7.3 ohms minimum. Then you must figure out the minimum watt rating of the resistor...

I always have it off when I connect the battery. Today I just connected it and there was a huge 2 inch spark that startled me, yesterday it was barely half an inch. I'm worried about the terminals being melted or flying into my face. Maybe I'll just leave the inverter connected for now even...

Is there a way to calculate the watt and resistance of the resistor that is needed mathematically?

Hello I am using a 300 watt inverter, I am sure it would be considered small to most of the people here that are running >5000 watt systems. However even with such a low rating, I am getting sparks when I connect it to the battery. I did some searching and it looks like Will says you should...

50ah, but it shouldn't matter how many ah it is right? Also can't be sure if it can really support 30 amps if you didn't measure your load. Laptops could use as low as 30 watts and mostly does 60 watts average. The smallest air conditioners use 750 watts according to google.

220 watt is my estimated max load, I have a 300 watt pure sine wave bestek inverter hooked up to a 12v lifepo4 battery as a portable power supply mainly for power outages. Maybe I"ll add solar to it later.

Is there a way to test how many amps it can safely hold besides seeing if the connector feels too hot or melts?

I am quite sure SAE connectors will work for lower amps like 11-12, even tiny awg 18 can carry that much current. I'm just wondering what the higher end is. When I look at how thick 10 awg is, the sae connector looks really thin so it makes me wonder.

Less than $200 and 220 watts max.

If you search for 10 awg sae connectors, you will see some claiming 30 amps or more. But it is hard to trust the accuracy of these specs, they just seem to coincide with the amp rating of the wire and chinese products/sellers usually have incorrect specs.

With a 12v lifepo4 battery so from 10-14.4v and inverter efficiency around 85%.

I am planning to run around 220 watts max, so I'm guessing around 26 amps max?

The SAE connectors all look the same to me. I got a pair of 10 awg sae connectors from amazon and they fit and look the same size as the one that came from my charger which looks like it's using a 14 awg wire, which is what makes me suspicious about how many amps they can really handle.