How long can the 12V400Ah battery 3200W inverter last at full power

Answer: 3200W is the rated output power of the inverter, because there is a conversion efficiency problem, the input must be greater than 3200W, according to 80%, to 4000W input power, the input current is 333A, 400Ah storage is 40A current discharge discharge for 10 hours, that is to say, the standard capacity of the battery is based on the 10-hour discharge rate standard, and when it is a new battery, the 333A discharge is less than 400Ah, which is only 1 hour. Therefore, the full power of the 3200W inverter can be used for about 1 hour when the 12V400Ah battery is fully charged.

The battery with such a large current needs to be heated, and it may not be continuous in actual use.

The first step is to find the power of the low voltage end of the inverter:

Because the power of the inverter generally refers to the power on the high-voltage side, but according to the law of conservation of energy, it can be inferred that the power of the low-voltage side of the inverter is slightly larger, and the difference between the two is worse than the efficiency ratio. The national standard stipulates that the conversion efficiency of the inverter with transformer shall not be less than 94%, and the conversion efficiency of the inverter without transformer shall not be less than 96%. Let's take the lowest 94% as an example.

Because, inverter conversion efficiency = inverter output power inverter DC input power 100%.

Therefore, the DC input power of the inverter = the output power of the inverter The conversion efficiency of the inverter = 3200w 94% = 3404w

Part 2 Finding the current at the low voltage end of the inverter:

Current on the low voltage side of the inverter i = low-voltage power Low-voltage voltage = 3404W 12V = 284A

Battery service time = battery capacity Discharge current = 400Ah 284A =

Part 4 Conclusion.

Because the above calculations are done under ideal conditions, i.e. the battery is in a full state, the 12V 400Ah 3200W inverter can be used for no more than hours at full power conditions.

A 3000W inverter generally requires at least 4 12V batteries, and 8 12V batteries are recommended.

If 4 12V200Ah batteries are used, it can work continuously for 4*12*200 3000*, about 2 and a half hours.

If 8 12V200Ah batteries are used, it can work continuously for 8*12*200 3000*, about 5 hours.

Due to the large load, it is not recommended to reduce the number of batteries, mainly because the battery working current is too large, the requirements for the inverter are too large, and the battery is also injured.

Commonly used vehicle batteries are mainly divided into three categories, namely ordinary batteries, dry-charge batteries and maintenance-free batteries.

Ordinary battery: The plates of ordinary batteries are composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid.

Its main advantages are stable voltage and low price; The disadvantages are low specific energy (i.e. energy stored per kilogram of battery), short service life and frequent routine maintenance.

Dry-charged battery: its full name is dry-charged lead-acid battery, its main feature is that the negative plate has a high power storage capacity, in a completely dry state, it can save the power obtained within two years, when using, only need to add electrolyte, and wait for 20-30 minutes to use.

The 12V battery generally does not exceed 1000W power, and the current is scary when it is calculated, the current = 3000 12 = 250A, and the battery can't stand 250A for a long time.

Difference knowledge: The maximum output current of the 12V80Ah battery is about 400A (whether it is a sealed battery or a start-up battery, refer to the cold start current of the corresponding model of the national standard) but it can only support 1 minute. 200A can support 10 minutes, 80A can support 30 minutes, 50A can support 1 hour, 10A can support 9 hours, and 8A can support 10 hours.

It's the same in theory. The actual use is not the same. The 24V100Ah battery lasts a little longer.

Because the voltage of 24V is twice as high as that of 12V. During the use of the inverter, the output of the same power, the relative heat generation of the high voltage is small, so that its efficiency is higher than that of 12V. So, the actual use time is a little longer.

Yes! According to the power is equal to the voltage x current, so the theoretical use time of the two is the same! Is it just that your inverter can accommodate a voltage difference of twice as much at the same time? aqui te amo。

Hello: 1, (under the same conditions) the inverter's [Battery lifeDepending on the time the battery is fully chargedBattery

12v、200aThe battery is fully charged with (12V 200Ah) 2400Wh. 【24v、100ahThe fully charged battery is (24V 100Ah) 2400Wh.

3. The [ of bothBattery] Exactly the same, the battery life should be the same.

The inverter for the 48V10A battery becomes 220V300W, which can be used continuously for hours.

Time (hours) = battery voltage (V) * Battery capacity (AH) * 80% * 70% Power consumption (W), = 48 * 10 * 80% * 70% 300 = hours.

2. In the formula for calculating the battery power time, 80% means that the battery can only use 80% of the power, and after using photoelectricity, the battery life is shortened by 80%, and the efficiency of the inverter is about 70%.

This depends on the actual storage capacity of your battery (the identification capacity of some batteries is too different from the actual storage capacity, which does not exclude the loss of capacity caused by the aging of the battery), and the working efficiency of the inverter, the theoretical calculation formula is: 48 * 10 300 can be used for more than an hour.

For more than an hour at full load, it is better to buy a car battery, and the 12V280A to 22V is enough for you to use for half a day.

See how many ampere-hours the battery has? Again.

Can a 12V200Ah battery with a 12 4500W inverter drive a 2500W home appliance for 5 hours.

Dear, I'm glad to answer for you. Can a 12V200Ah battery with a 12 4500W inverter drive a 2500W home appliance for 5 hours. A:

If you don't consider efficiency, it's only enough for 2500w appliances to be used for less than 1 hour, and if you consider efficiency, it looks like about 40 minutes. 12x200=2400 Generally, the battery can be discharged according to 70%, 2400x70% = 1680, the inverter conversion efficiency is generally between 80-88%, depending on the brand grade, 85% is calculated 1680x 85% = 1428, time is calculated 1428 3000 = hours, that is, 28 minutes. Hope mine can help you!

This household appliance with a total power of 8000w (is all your household appliances). There is a problem here, the 8000w electrical appliance is marked with useful power, but in fact, it is necessary to count the useless power, that is, to know what the total apparent power is, TV, computer, induction cooker, etc., at least 8400W to be able to get it. You have to ensure that all household appliances can work normally at the same time, then you have to have at least 15kw (15000w), which is the minimum guarantee to ensure that the inverter is not burned and other household appliances can work normally.

Let's calculate it according to your 8000W power first. The electricity used for household appliances is 220V, 50Hz alternating current, and the power supply current can only be above 36A, but in fact it has to be 36 (1+10%)), which is the mains power.

What about the battery? The output power should reach 8400W (not according to your 8000W), if the efficiency of the inverter is 80% (in fact, many inverters do not have this efficiency), you use a 12V battery, then the calculation is: 8400 80% 10500W (this level can be said to have no margin, generally requires 20% of the margin), plus 20% of the margin, then there is 10500 (1+20%) 12600W, this capacity can ** Your 8000w household appliances.

If the input power is 12600W, the current of the 12V battery must be: 12600W 12V 8 times 1050A 8 times 8400

AH's battery. If you use a 12V battery, you need to use 500Ah (17) together, (the 8 times the margin of the battery is calculated for the protection of the battery, if you use 4 12V300Ah batteries together, you can also use it, but the life of the battery will be damaged quickly or can not work for a long time).

The following gives you an emergency algorithm: 8000W 12V 4 times 660A 4 times 2540Ah

Battery, with a 7500W inverter (the margin of the inverter is also used), only 6 12V400Ah batteries are needed, which can be emergency for about 10 minutes (more than this time will damage the battery). This algorithm doesn't take into account losses and so on...