So, with this information at hand, a common 100Ah-150Ah lithium battery of this type can deliver enough energy to operate a maximum of a 1000w inverter. When calculating the amp usage of an inverter, you take the output wattage of the inverter and divide it by the battery voltage, i.e. 1000W ÷ 12V = 83.33 Amps.
For every 100Ah of deep cycle battery, you can power a 1000W DC to AC Inverter.
In summary: They are compatible, but the runtime will be shorter. Applying a 2000W inverter to a 100Ah battery is feasible, but several factors need to be considered. We should opt for an efficient inverter and evaluate the chosen battery's ability for sustained discharge.
If the battery banks you want to purchase are also 50Ah, you will need six of them for a 3000-watt inverter. If your batteries are rated 100Ah, you would only need three, and with 170Ah rated batteries, only two would be required.
I agree, the weize LFP 100Ah on Amazon says 100A standard discharge rate, max 200A discharge, and 100A charge. Should handle a 1500W inverter fully loaded for a few seconds, and low loads around 1000W for constant.
So, if You have a brand new, fully charged 12V 100Ah lead-acid deep cycle battery and You want to power a 1000 Watt inverter with an energy efficiency of 85%, You can expect a runtime of ~30-35 minutes.
An inverter only needs to be able to handle the amount of energy being produced by the array it's connected to, so it's pointless installing one that's too big for the amount of energy that's being produced.
For a 1000-watt inverter running at full capacity, you can expect a 200 amp-hour battery to last roughly 2 hours. At half capacity, you could get four hours; quarter capacity could last eight hours, and so on.
Therefore, you need a lot larger AGM battery bank to power the same size inverters. This general rule of thumb can be applied: A 1000W inverter should be coupled with 2 x 120A batteries. A 2000W inverter will need 3 x 120Ah batteries.
Typically two batteries are needed for a 2,000 watt inverter like the part # 34278156 that you referenced.
If you max out the inverter at 2000 watts, you are pulling 2000 watts /12 volts = 166.6 DC amps per hour. If you use a 200-amp 12-volt battery, you would divide the 200-amp battery / 166.6 amps = 1.2 hours of run time. This is if you plan on fully depleting the battery, which we DON'T recommend.
Lead acid batteries can only be discharged to 50%. So, if you're using a 12V 100Ah lead acid battery to run your 12V fridge, you'd be done at around this point. Your battery would be able to run your fridge for about 2 days at most before needing to be recharged.
A 300 watt inverter connected to a 12V battery with 100A per hour will produce 5.42A, that is, 65A/12V. This then gives us the battery rundown, which is calculated by dividing 100Ah by 5.42. The result is 18.45 hours, but because there's a need to consider inefficiency, the battery rundown is set at 17 hours.
REVOV recommends a 2:1 for the battery capacity to the maximum inverter output power ratio when designing and installing a solar system. Thus, for every 1kVA that the inverter is specified to provide, 2kWh of battery capacity should be present.
We recommend having a minimum of 100Ah battery for each 1000watts inverter capacity. For example, a 3000-watt inverter would need at least three 100Ah Battle Born Batteries. Just as important as the capacity is the battery type.
CALCULATE THE INVERTER'S REQUIRED CAPACITY
Recall, the total power consumed by your home (total wattage) – 460W. Therefore, required VA rating of inverter = (460/0.8) = 575VA. This is approximately a 0.6kVA (600VA).
Inverter “undersizing”
If we undersize the inverter too much then we will simply observe 'clipping' where the solar panels have the potential to produce more than the inverter can convert to AC, but the inverter limits the output to produce its rated maximum.
Let's say you then plug in a 400 watt device; now the 1,000 watt inverter is operating at a load of 900 watts. If you then attempt to plug in another device that requires 300 watts, the inverter will show an over-load condition and shut down (since the total load is now at 1,200 watts).
Disadvantages of an oversized inverter: Lower efficiency at low power output: Inverters are typically most efficient when operating at or near their rated capacity. If your solar array consistently produces power below the minimum operating threshold of an oversized inverter, it may operate less efficiently.
You need around 310 watts of solar panels to charge a 12V 100Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller. You need around 380 watts of solar panels to charge a 12V 100Ah lithium battery from 100% depth of discharge in 5 peak sun hours with a PWM charge controller.
In summary. If you have a 12 volt 100ah battery and you buy a 300w solar panel, it will only take you 4 hours to fully charge it.
An average 200-watt solar panel will charge a typical 12-volt car battery in 5-8 hours. The charge time depends on the battery capacity, and it takes around 2.5 hours for a 200-watt solar panel to charge 100Ah of battery capacity.