You bought the wrong kind of battery. This is a U1 starting battery. It’s meant to turn over the engine on a lawnmower. The plates are thin and don’t like cycling. At least you have caps that you can pop and refill with distilled water. Ideally you’d want a DC battery, maybe a lithium for lighter weight and higher capacity. Or a good DC SLA. Small discharges are ideal and charge after every use. Answer from munn0014 on reddit.com
PowMr
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2 Steps to calculate how long will a 12v battery last with inverter
April 30, 2025 - Inverter Rated Power 12V Battery Runtime at Full Load 12V Battery Runtime with No Load (5%) 500W 2.4 hours 48 hours 1000W 1.2 hours 24 hours 1500W 0.8 hours 16 hours 2500W 0.48 hours 9.6 hours 3000W 0.4 hours 8 hours Note: Most inverters use ...
Reddit
reddit.com › user/leaptrendnewenergy › how long will a 12v battery last with a 1500 watt inverter?
r/u_LeaptrendNewEnergy on Reddit: How long will a 12V battery last with a 1500 watt inverter?
June 7, 2023 - Estimate Runtime: Divide the available energy by the power consumption of the inverter to estimate the runtime. In this case, 2160Wh / 1500W = 1.44 hours, or approximately 1 hour and 26 minutes.
Quora
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How long will a 12V battery last with a 1500 watt inverter? - Quora
Answer (1 of 2): What is “a 12-vilt battery?” Is it one of these? Perhaps it is one of these? Or perhaps it is one of many 12 volt battery designs between these two. Is the battery a primary or secondary battery? Please note that world wide Quora users cannot read your mind.
Goo SolarPower
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How Long Will A 12v Battery Last With An Inverter? Calculator - Goo SolarPower
January 11, 2025 - Enter the size of your 12 volt ... regular depth of discharge (DoD) of 80% will run a fully-loaded 1500 watt inverter for 13 minutes....
Portable Solar Expert
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How Long Will a 12V Battery Last with a 1500 Watt Inverter? - portablesolarexpert.com
August 27, 2021 - A 12V 250ah battery can run a 1300W load for two hours, but that is on a full discharge. If you want to recharge at 50%, you will need a 500ah battery bank. If you don’t want to get an additional battery, get a 24V unit (if compatible with ...
Reddit
reddit.com › r/batteries › i bought this battery with a 1500w inverter to have some electricity in my small camper. how long will it last between charges?
r/batteries on Reddit: I bought this battery with a 1500W inverter to have some electricity in my small camper. How long will it last between charges?
August 4, 2023 - They give you a 275CCA rating but that doesn't specify how low the voltage can go, whereas the inverter has a fairly high cutoff. Actual capacity is probably 35ah, useable I'd give you about 10-15ah depending on draw rate. A palm size battery bank contains about as much useable power. I would ditch the chinese 1500w inverter and get a quality 300w unit.
Carspa
carspa.cc › learn › how-long-does-a-12-volt-battery-last-when-used-with-a-1000-watt-power-inverter-or-other-inverter
How long does a 12 volt battery last when used with a 1000 watt power inverter or other inverter？ - Zhejiang Carspa New Energy Co.ltd
July 16, 2024 - Backup batteries: Consider using ... ensure continuous power supply. ... A 100Ah 12V battery will only provide approximately 0.54 hours of power when using a 2000W inverter....
Top answer 1 of 3
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Say you draw 1700w due to inverter efficiency, which is 142Amps. 230Ah capacity is usually at 0.01C which means this is the capacity at (Battery Ah)*0.1 Amps Draw - which is 23Amps in your case. If you go to 0.5C (115A) for example, your capacity is around 70%. After understanding this, there are a few more things to be aware of:
- On such amperage you are going to create a lot of heat, I don't think you want to run on such amperage for a long time. (Rule of thumb - don't let your battery get to 50C). Batteries that get warm while operating/in storage die very early
- Lead Acid batteries should not be discharged to more than 50-70% (depending of their technology and quality) of their full capacity - on your case it means DO NOT discharge more than 115Ah! (This is called DoD, discharging more than this will shorten the life of your battery drastically)
- This amperage requirs very thick cables, consider going to higher voltage batteries (in series) and inverter to lower the amperage
2 of 3
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Your mistake is treating amp-hours (Ah) as energy. They are not. Amp-hours are units of charge. The efficiency of the inverter applies to the power, not the current:
$$\rm output\ power = input\ power \times efficiency$$
So if you have a 1500 watt load, your average input power would be:
$$\frac{1500 \mathrm W}{85\%} \approx 1765 \mathrm W$$
Which means your average input current would be:
$$\frac{1765 \mathrm W}{12 \mathrm V} \approx 147 \mathrm A$$
Which gives a run time of:
$$\frac{230 \mathrm{Ah}} {147 \mathrm A} = 1.56\ \mathrm {hours}$$
Note that 147 amps is a dangerously large current, so be sure your battery is wired to the inverter properly.
HZH MARINE
hzhmarine.com › news › how-long-does-a-12v-battery-last-with-an-inverter-a-comprehensive-guide.html
How Long Does a 12V Battery Last with an Inverter? A Comprehensive Guide
December 6, 2024 - Battery Runtime (hours) = (Battery Capacity (Ah) * Battery Voltage * Inverter Efficiency) / Load Power (watts)
JCPOWER Inverter
junchipower.com › home › blog › how long will 12v battery last using power inverter
How Long Will 12v Battery Last Using Power Inverter
December 30, 2025 - For example, a 12V battery with a capacity of 100Ah means that it can continuously output 1 ampere of current at a voltage of 12V for up to 100 hours. This feature makes the battery flexible in different application scenarios.
Amazon
amazon.com › ask › questions › Tx3TPJMD54VN7B › ref=ask_ql_ql_al_hza
Q: I want to run a 1500 watt inverter with this battery. ...
David Tullos says it will last 8 - 10 hours on full load (1500 watts) but I do not believe it will last any where near that long. The first link I have provided below computes the battery will last .66 hours at a continuous 1500 watt load and that makes sense to me.
Wistek
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How Long Will a 12V Battery Last When Using an Inverter – Wistek
Battery capacity is measured in ampere-hours (Ah) and represents the amount of charge a battery can store. A common 12V battery, such as a 100Ah deep cycle battery, theoretically provides 1 amp for 100 hours or 10 amps for 10 hours.
LiTime
litime.com › home › litime lithium blogs › how long will a deep cycle battery power an inverter?
How Long Will a Deep Cycle Battery Power an Inverter? – LiTime
August 30, 2024 - For example, if you have a 12V 100Ah deep cycle battery, a 90% efficient inverter, and a 500W load, the calculation would be: Runtime = (100Ah × 12V × 0.9) / 500W = 2.16 hours · This means the battery could power the 500-watt load for ...
ECGSOLAX
ecgsolax.com › blogs › for-beginners › how-long-will-a-12v-battery-last-with-inverter
How Long Will a 12v Battery Last with Inverter? – ECGSOLAX
May 15, 2023 - Overall Power Consumption = Power Required by Load / Efficiency of Inverter + No-load Power Consumption of Inverter By understanding these three factors and accurately calculating the power consumption, you can estimate the run time of a 12V battery with an inverter more effectively. To determine the battery's running time, follow these two steps: (1) Calculate the Battery Power Capacity Start by identifying the power capacity of your 12V battery. This information is typically provided by the battery manufacturer and is measured in watt-hours (Wh) or ampere-hours (Ah).
Energy Theory
energytheory.com › home › inverters & generators › how long will a 1500 watt inverter run?
How Long Will a 1500 Watt Inverter Run? - Energy Theory
November 17, 2023 - So, for a 12-volt system, it is crucial to have a battery capable of delivering a reliable and secure current of 125 amps per hour when utilizing 1500 watts of power. Suppose we have a 24V system, following the same rule. ... So, we need a battery size with a capacity of 62.5 amps to maintain its performance. Choosing a 12V system would require you to have a substantial battery life.
Power Inverters
powerinverters.com › pages › how-long-can-i-run-the-power-inverter-on-my-battery
How long can I run the power inverter on my battery?
Note: If you intend to use power tools for commercial use, or any load of 200W for more than 1 hour regularly (between battery recharging) we recommend installing an auxiliary battery to provide power to the inverter.
High-Tech Battery Solutions
techbatterysolutions.com › home › resource and information center › inverter runtime calculator
Battery Runtime Calculator (12V & 24V): How Long Will Your Inverter Run?
Pull a battery below 50% on a regular basis and you cut its service life in half, even if the spec sheet says otherwise. One real-world example. A Vision EV27 (100Ah Group 27 AGM) powering a 600W mini-fridge through a 12V inverter gives you roughly 50 minutes of runtime, not the two hours the raw ...
Top Bull Shop
topbullshop.com › blogs › solar-energy-basics › how-long-will-12v-battery-last-using-power-inverter
How Long Will 12V Battery Last When Using a 2000W Power Inverter?
October 14, 2024 - For example, there is a 2000W inverter that has a conversion efficiency of 90%. This means that if the device requires 1500W of power, then the inverter input power must be approximately 1666.7W (1900W/0.9). The extra 166.7W is due to heat and other losses generated by the inverter during the conversion process. ... To calculate how long a 12V battery can be used in the inverter, you must determine the total power consumption of the inverter and its connected loads.
Battery Equivalents
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How Long Does an Inverter Battery Last?
October 11, 2024 - For short, if You have a 1500W power inverter, it requires at least 140Ah 12V, or 70Ah 24V, or 47Ah 36V battery in order to operate for one hour.