How long would it last battery on power inverter?
Your actual load is 100W... With no losses the current is 100W/12V = 8.33A This means you need 8.33Ah capacity for each hour of running, with provisos as below. WIth a 7Ah battery that implies 8.33A/7Ah = 0.84 hours The nominal voltage of a 12V battery is 12.6V, but you will be lucky to have 12V at the inverter terminals. Battery ratings.. The battery will be rated at the 10 or even 20 hour rate, so that is a current of 0.7A or 0.35A for a 7Ah battery. The current you are drawing is 10 times that, in reality too much for this battery. The battery capacity is derated considerably, so the implied 100W running time of 50 minutes becomes maybe less than half an hour. In practice the losses due to the inverter must be added as part of the load. As this is a low load for an 800W inverter it would just be a stab in the dark to say what its losses are, unless you can measure the actual current drawn from the battery when running under that load. My feeling anything from a few watts to 150W losses. It could more than double the load. You could be down to 10 minutes if the battery doesn't get overheated. Batteries are also less capable in cold conditions. A 7Ah battery is more suitable for loads about 10W. Get the drift? You need a larger battery. The load is more consistent with an 80Ah size deep cycle battery. This would run more like expected, up to 9h, perhaps somewhat less due to inverter losses. If you want to run the Laptop only, it makes more sense to use an external battery pack that plugs in more directly. This will be more efficient at least. Most laptops run from an 18V battery. Look into the solutions for converting 12V to 18V (Laptop car adaptors), that will run on your battery as well. A solution that might be available, or soon will be, is a fuel cell for laptops. See the link. We are talking about something like 200ml of Methanol for 20h for a notebook. Sounds attractive.
Connecting jumper cables to power inverter cables (mini jumper cables)?
That's fine for a temporary use situation. However, if you are going to be using this regularly in the same vehicle, I would recommend a more permanent installation using 4 ga power wire directly to the positive terminal of the battery. Make sure you install a fuse on that wire as close to the battery as possible. If the jumper cables are cheap and thin, or the contacts are coroded or not making good contact, this can cause the voltage to drop to your inverter and cause it to draw more current and possibly fry the power supply.
I have connected my power inverter and car cigarette lighter, but there’s no power. What should I do?
Check that the outlet is powered—use another device; plug it in and see if it works. Sometimes, the electrics just die. Sometimes, a fuse is blown; check your fuses.Check the inverter to see if it works in a friend’s vehicle.Repair or replace the non-functioning device, whether it’s the fuse, the receptacle, or the inverter.I hope this helps.
Can i use a power inverter to power a heater in a car?
It can't be done practically. The current drain would overheat the alternator quickly. The hardware required to make this idea work would far outweigh the cost of the heater repair. On top of that, the engine would be using more power to spin the giant alternator to run the heater than it would to push the car down the road. Your gas mileage would be cut in half. If you're desperate and you have one of those cars that it takes 9 hours to change the heater core, try removing the heater hoses and gently blow the coolant out of the core with air, then fill the core with pure rad flush chemical from any parts store. Leave it in there for half an hour or so and agitate it about every ten minutes by pouring a little more in. Flush it in reverse gently with a hose before hooking it back up. This has worked for me several times.
Can a 12v car alternator power a 12vdc-220v 5000w power inverter?
That's pushing it. A typical automobile alternator puts out no more than about 100 amps when run at maximum speed. At lower speeds it's capable of less. Assuming a 13.5 volt output when running that would be 1350 watts at most. Rather than run your engine at redline for 8 hours in order to produce less than 1/3 of the power you need assuming 95% inverter efficiency, you would be better off with a portable 5000 watt generator set that uses about a 10 HP engine. The output waveform will be better for your appliances as well. Rent one if you need to. Your car (and the two others you would need) will thank you and you'll save enough gas to cover the rental. Don
Can we charge a car battery with a 650va inverter?
If the inverter is powered from from a source other than the battery you want to charge-yes, provided the output voltage of the inverter as well as it’s max current are correct to charge the battery.
How can I use a 12-volt car battery to power my laptop without an inverter?
I just had this arrive from ebay for $3 3–32 volts input 12–14volts is well within the car voltage and my laptop power supply is 19 volts at 3.2 amps.I measured it running the laptop and it was only drawing a maximum of 2 amps so 4 amps leaves plenty in reserve.I adjusted it to 19 volts so I will just connect a cigarette lighter plug to the input and the damaged laptop cord to the output it is rated at 94% efficient that has to be better than running an inverter and the laptop power supply.https://www.ebay.com.au/itm/DC-D...A few days later here it is in action with a 13.8 v power supply with a cigarette lighter socket it is dark and raining and I am not going out to the car just to try it on the car battery.
Can I run a 300W power inverter off a 9ah motorcycle battery?
Assuming your inverter and battery are both rated for 12V operation, you can certainly run your inverter off your battery, but since your battery is only good for about 12 x 9 - 108 watt-hours at the most, you either won’t be able to (a) connect anywhere near rated AC load to it, or (b) operate it for more than a few minutes.
I have a 300w power inverter, while it is said the car cigarette lighter can only support less than 200W inverter, or the fuse will be blown. Is it safe to plug my inverter into the cigarette lighter?
Most inverter in the 100 to 600 Watts range (sometime bigger) are safe to operate using the Cigarette Lighter plug — as long as the total load is inferior to 120W (or might be less then 180W in your case). This load must be measured at the 12V side of the inverter.The real limit should be written in your car manual. Most Honda have a limit of 120 Watts (10 Amps under 12V). A Chevy Silverado have a limit of 180 Watts (15 Amp). Most car have one or the others limits depending on the manufacturer/class of vehicle.If you want the full output of the inverter, you need to wire it directly to the fuse box (if spare spot exist) or the Battery (and you need fuse). The gauge of the wire will be #14 (under 10 feet) or #10 if longer.Some largish inverter can’t be plugged on a car cigarette lighter plug. This is linked to the fact that some have large “condenser” that need quite a bit of electricity for their power-up sequence. Consequently, they blow the fuse right away.