How long does a 200Ah battery last – what can it power?
As a general rule, the run time of a 200Ah battery depends on the battery chemistry and the size of the load connected to it. Battery temperature and discharge rate also impacts how long a battery will last, but it’s the load that drives it all.
The two major types of batteries in this size range are lead acid and lithium phosphate. Each type has different characteristics, advantages and disadvantages.
A 200Ah lead-acid deep-cycle battery running a 400 watt DC load with 50% recommended Depth of Discharge will last for approximately 3 hours. A 200Ah deep-cycle lead-acid battery will power a 400W rated refrigerator for about 25 hours at a rate of 40 watts per hour.
Are 200Ah lithium batteries better than lead-acid?
Lithium phosphate batteries are more expensive, but they have several advantages, the biggest being that they are intrinsically deep-cycle.
They can be discharged to a much greater depth than lead-acid deep-cycle. This means that you can get more power out of it for the same rated capacity.
Most LiFeP04 batteries can be discharged 95%, but 80% is recommended to maximize battery life.
A 200Ah lithium phosphate (LiFeP04) batteryconnected to a 400 watt DC load with 80% Depth of Discharge will last for almost 5 hours. A 200Ah lithium phosphate (LiFeP04) will run a 400W rated fridge for about 55 hours at a rate of 40 watts per hour.
Video – 200 Ah Battery Power – How long does a solar battery last?
How long will a 200 Ah battery run an appliance that requires 400w?
There are two basic types of loads:
DC, such as supplied by solar panels and batteries
AC, such as the power supplied by utility companies
In general, a 200Ah battery will run an AC load for less time than a DC load, simply because an inverter is needed to convert DC to AC.
The best quality inverters are about 95% efficient, so you lose 5% running time as extra power is needed to power the inverter electronics.
A 200Ah lead-acid deep-cycle battery should only be discharged 50% in order to maximize battery life, so only 100Ah is available for use. (80% can be used now and again.)
100Ah converts to 1200 watt-hours. Dividing this by 400 watts load gives us the answer:
A 200Ah lead-acid deep-cycle battery with 50% Depth of Discharge will run a 400W AC appliance for about 3 hours.
What can a 200ah battery run?
Unless using the battery for marine or RV purposes, 200Ah battery run questions normally have AC home appliances in mind.
Such a battery will run a variety of home appliances with different power ratings but the run time will decrease as the wattage increases.
This is fairly linear, unless dealing with large motors that cycle on and off, such as found in fridge compressors. (Read about running compressors here.)
The table below shows approximate run times for home appliances running from a 200Ah lead-acid deep-cycle battery with 50% discharge, compensated for inverter losses:
Table – 200Ah battery backup time – home appliances run-times
200Ah 12V deep-cycle lead-acid battery (50% discharge) with inverter fed AC loads. | ||
Home Appliance | Rated Load (watts) | Estimated Running time (hours) |
Air purifier | 25 watts | 48 hours |
Portable Air Conditioner | 500 watt rated load (70 watts average per hour) | 16 |
Ceiling Fan | 60 | 20 |
Coffee Maker | 800 | 1.5 |
Deep Freezer | 25 | 48 |
Electric Shaver | 15 | 80 |
Fluorescent Lamp | 30 | 40 |
Fridge | 120 | 10 |
Freezer | 40 | 30 |
Laptop Computer | 100 | 12 |
Pedestal Fan | 60 | 20 |
Tablet Charger | 10 | 120 |
Vacuum Cleaner | 500 | 2.4 |
WiFi Router | 10 | 120 |
Water Filter and Cooler | 80 | 15 |
Treadmill | 300 | 4 |
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How long can a 200Ah battery run a fridge
How many hours would a 200Ah battery run a fridge?
A typical fridge power rating as read on the name-plate might be about 400 watts. However, this doesn’t represent the power taken at any instant in time.
This is because the compressor motor starts and stops, so it’s difficult to assess instantaneous load at any instant in time.
The fridge draws almost no current when it’s cold enough i.e. the motor doesn’t run, it draws a lot when the motor starts (inrush current) and a smaller amount for continuous running.
This why the amount of energy used over time is more important when considering battery run-time. A 400 watt fridge will pull about 40 watts per hour.
A 200Ah lead-acid deep-cycle battery will run a 400W rated fridge for about 25 hours at a rate of 40 watts per hour.
200Ah battery run-time calculator
Use the calculator below to find a realistic run-time for any AC home appliance running from a 200Ah battery through an inverter.
This calculator assumes an inverter efficiency of 85%, which is a bit low, but ensures that the run-time will be of practical use and not just theory.
How long will a 200ah battery run an appliance that requires 200w?
If the load is DC, such as might be found on boats or RVs, then the calculation is pretty straight-forward:
200Ah = 200 x 12 volt = 2400 watt-hours
However, only 1200 watt-hours is available at the recommended 50% discharge so:
Run time for 200Ah battery running 200 watts DC = 1200 watt-hours/200 = 6 hours
For an AC load, it’s a little bit different. Let’s assume it’s a constant load and not a fridge, heat pump or air conditioner with compressor motors on board.
AC appliances use inverters which also need power to run i.e. they have losses. If running at full rated capacity, an inverter may have an efficiency of 95%, if it’s high quality.
The calculation becomes:
Run time for AC load = 1200 watt-hours/200 x 0.95 = 5.7 hours
How long will a 200ah battery last taking 20A continuous current?
Logic tells us that it should be 10 hours, by dividing 200 amp-hours by 20 amps.
This is not the case. You can see from the specification for a 200Ah AGM lead-acid battery below that if 18 amps is drawn from the battery, it’s capacity is only 180Ah. That’s the first thing.
Also, batteries should only be discharged to 50% of their rated capacity in order to maximize battery life, so the real available capacity is nearer 100Ah.
All of the above means that you should only draw 20 amps from a 200Ah battery for 5 hours, if you don’t want to have a very short battery life.
Renogy 200Ah Battery Specification Sheet PDF
How many solar panels does it take to charge a 200 Ah battery?
Assuming that the battery is a deep-cycle lead-acid depleted 50%, then it needs 100Ah or 1200 watt-hours to recharge it.
100 watts of solar panel rating generates about 400 watt-hours per day on average, so a 300 watt panel should charge the battery during a day.
A 400 watt solar panel using an MPPT solar charge controller will charge a 50% depleted 200Ah battery in about 5 hours with irradiance of 4 peak-sun-hours.
How many amps does a 200 watt solar panel produce?
A typical 200 watt solar panel can have different numbers of cells, which changes the voltage delivered by the panel.
The Renogy compact 200W solar panel has 40 cells, giving Open Circuit Voltage (Voc) of 27 volts and maximum working current of 8.85 amps.
The Sunpower SPR-200-BLK-U 200 watt panel has 72 solar cells – Voc is 47.8 volts and current is 5 amps.
Amso Solar AS200M-36 200 watt solar panels have 36 cells – Voc is 24.1 and current is 10.1 amps.
How many watts is a 200Ah battery?
You need to think in terms of watt-hours (energy), not watts. Watts can change at any time.
For example, if a battery delivers 10 amps at 12 volts, then power in watts is found by:
10 amps x 12 volts = 120 watts (instantaneous load)
In general, if you double the amps then the power in watts doubles.
On the other hand, the energy capacity of a battery takes into account time, just like amp-hours. It’s measured in watt-hours.
200Ah x 12 volts = 2400 watt-hours
I often find it convenient to use watt-hours for battery capacity for sizing batteries to loads, and also to solar panels for solar charging purposes.
How long will a 48V 200Ah battery last?
On the face of it it seems that theoretically the absolute capacity of a 200Ah battery is 200Ah, but this is not the case. If a 200 Ah battery has a discharge rating of 0.2C, for example, then it its rating will be 200Ah if discharged at 200 x 0.2 = 200Ah.
However, as more current is drawn from a battery temperature rise and the increased chemical activity internally has the effect of reducing the capacity. The table below shows how increased current draw reduces the capacity of a Renogy 100Ah battery:
Capacity in Amp-hours | Current Draw in Amps | Actual Capacity |
10 Hour Rate (20.0A to 10.8V) | 200.0Ah | |
3 Hour Rate (52.0A to 10.8V) | 156.0Ah | |
1 Hour Rate (122.0A to 9.6V) | 122.0Ah |
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From the table above you can see that if the current draw was 20 amps (960 watts load), the battery would last 10 hours before the terminal voltage falls to the level specified by the manufacturer.
- At 52 amps (2496 watts load) the battery would last 3 hours.
- At 122 amps (5856 watts load) the battery would last 1 hour.
How long does it take to charge 200Ah lithium battery?
Lithium Phosphate Batteries (LiFeP04) are extremely robust, both physically and electrically. Some models can be discharged completely 100%, while most specify maximum 80% discharge to maintain long life.
The image below shows that the maximum charge current for this battery is 100 amps, so a fully depleted Renogy 200Ah battery can be fully recharged in 2 hours.
Maximum charge rate 200Ah LiFePo4 – Courtesy Renogy
Download 200Ah Lithium Battery Spec. Sheet PDF
How many solar panels do I need to charge a 200Ah battery in 5 hours?
The easiest way to estimate how many solar panels needed is to convert the 200Ah to watts (watt-hours) and compare the watt-hours output of a solar panel. I’ll assume 100 watt solar panels will be used and a deep-cycle 12 volt 200 Ah battery discharged to 80%:
- 200 Ah to watt-hours = 200 x 12 volts = 2400Wh
- 80% discharged = 1920Wh
- 100 watts solar panel output at 4 peak sun hours = 400 watt-hours
- Number of 100 watt solar needed to recharge = 1920/400 = 4.8 (5) solar panels
5 solar panels of 100 watts each would be needed to recharge an 80% discharged 200Ah battery in 5 or 6 hours with average irradiance and no clouds.
How to calculate battery capacity for a solar system
Once you know how many kilowatt-hours (kWh) your home consumes each day, and how big the solar system you need to meet your needs, it’s easy to work out how much battery energy storage you need.
It’s best to work it out per day. For example, in the table below I assume an energy demand/supply of 30kWh per day. It shows how to work out how many batteries tyou would need for one day’s autonomy. Just multiply the result by the number of days autonomy you need.
Note that the battery Ah needed is reduced by a factor of 60% for deep-cycle lead acid and 80% for lithium phosphate technology. These are the recommended Depth of Discharge for each type of battery.
Solar battery capacity calculation step-by-step:
- Take home energy consumption in kWh/day (US average is 30kWh)
- Divide kWh by battery voltage (48 volts in this case) – answer is in amp-hours (625Ah)
- For lead acid divide by 60% (max discharge advised) – 1041Ah
- Divide by individual lead-acid battery capacity (assumes 250Ah) – 4 batteries required
- For Lithium Phosphate batteries divide by 80% (max discharge advised) – 781Ah
- Divide by individual Lithium Phosphate battery capacity (assumes 250Ah) – 3 batteries required
Table – Calculate battery backup for a 30kWh/day home solar system
Backup For 24 Hours | Rating | Measurement Units |
Total load for 24 hours backup | Say 30kWh (average O.S. home enrgy consumption) | kiloWatt-hours (Wh) |
Battery bank voltage | 48 | volts |
Total amp-hours | 30000 watts-hours/48 volts=625 Ah | amp-hours (Ah) |
Required Ah Batteries (60% Depth of Discharge) Lead-Acid Deep Cycle | 625/0.6 = 1041Ah required | Ah |
How many lead-acid batteries – 250Ah each | 4 | |
Amp-hours Lithium Iron Phosphate Batteries? (80% DOD) | 625/0.8 = 781Ah required | Ah |
Number of Lithium batteries batteries @250Ah each | 3 |
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Other resources relating to 200Ah batteries:
How Long Will a 200ah Battery Last? (Explained)
How Long Will a 200ah Battery Run an Appliance That …
How many hours will the 12v 200Ah battery last for?
How long will a 200Ah battery last? – Ayixa
FAQs
What can a 200Ah battery run? ›
Example of the kind of results you will get: This 12V 200Ah lithium-ion battery can run a 500-watt device for 4.32 hours (4 hours and 19 minutes).
How many hours will the 12V 200Ah battery last for? ›A new 200ah deep cycle battery connected to a 12v inverter, will last 10 hours if discharged with a load of 150 watts at 80% efficiency and depth discharge.
Can a 200Ah battery run AC? ›If your goal is to run an air conditioner in your Trailer or RV with your lithium batteries, know that one fully charged 200Ah lithium battery will give you about one hour of run time on a typical 15,000 BTU air conditioner, assuming no other loads.
What is the capacity of 200Ah battery? ›The 12 volts 200 amp hour battery in question has a total capacity of 200 Ah X 12V = 2400 watt-hours.
How many solar panels do I need for a 200Ah battery? ›You need around 430 watts of solar panels to charge a 12V 200Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller.
How long does it take to fully charge a 200Ah battery? ›【LiFePO4 Battery + Dedicated Charger】Litime 12V 200Ah LiFePO4 battery can be efficiently charged by 14.6V 20A LiFePO4 battery charger in around 10 hours from 0 to 100% capacity, which takes only ½ the time of the traditional battery charger.
Is it better to have 2 100Ah batteries or 1 200AH battery? ›A: As far as capacity goes it's the same. However, 2 100 ah batteries would be better than 1 200 ah battery. This is because if anything ever happens to the 1 200 ah hour battery your screwed until you get another… see more. However, 2 100 ah batteries would be better than 1 200 ah battery.
How many batteries do I need to run a 3000 watt inverter? ›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.
What size of inverter is good for 200AH battery? ›You can use as many 200AH batteries with your 1000 watt inverter as you please.
Can I run my air conditioner on battery power? ›The short answer is yes. With the proper equipment and enough batteries, you can run your RV AC unit on batteries. In addition to the lithium batteries, you'll need an inverter to invert the DC battery power into AC power for most air conditioning units.
How many solar panels can charge a 12V 200Ah battery? ›
To charge a 12V, 200Ah battery in 5 hours of sunshine you will require a minimum of 2 numbers of 325 Watt of solar panels with MPPT based charge controller and seasonal structure.
How many 12 volt batteries does it take to run an air conditioner? ›Four 12 volt batteries is the very minimum needed to run a rooftop RV air conditioner. But then, that will only run an air conditioner for about 1 hour maximum. Of course, it depends upon the type of battery.
How many solar panels do I need for 2 200Ah batteries? ›About 14000 panels will be need. 1.8 MWH of batteries. How do I determine the number of hours my 200Ah battery will be charged by solar panels? Your battery has a 200 A-hr capacity and a nominal voltage.
How many 200Ah lithium battery can power a home? ›Total number of batteries
Divide the total energy of the battery (Assuming you're using a 200Ah battery for your design. It could 150AH) by the Battery Voltage x Capacity. Approximately, that will be 2 batteries. Therefore, you will need two, 12V 200Ah batteries to power your load for 7 hours.
Number of Batteries
A battery bank designed to power an average American household for three days would need to supply 90 kilowatt-hours of energy. The battery from the previous example can supply 2.4 kilowatt-hours, so this system would need 38 batteries.
How long will a 200w solar panel take to charge a battery? A 200-watt solar panel takes an average of 5-8 hours to charge an average car battery. If you would like to live off-grid, you will need several of these panels and more same-size batteries.
Can a 200Ah battery run a fridge? ›A 200Ah deep-cycle lead-acid battery will power a 400W rated refrigerator for about 25 hours at a rate of 40 watts per hour.
Can a solar panel overcharge a battery? ›Solar panels can overcharge a battery, but this generally doesn't happen so long as we understand them and follow manufacturer guidelines. This article gives insight into the damages caused to the batteries due to overcharging and how this can be prevented.
What is the maximum charging current for 12v 200Ah battery? ›Every three months, recommend equalization charge for one time. Equalization charge method: Discharge: 100% rate capacity discharge. Charge: Max. current 0.3CA, constant voltage 2.35V/Cell charge 24h.
How long will a 200Ah lithium battery run a fridge? ›A 200Ah lithium phosphate (LiFeP04) batteryconnected to a 400 watt DC load with 80% Depth of Discharge will last for almost 5 hours. A 200Ah lithium phosphate (LiFeP04) will run a 400W rated fridge for about 55 hours at a rate of 40 watts per hour.
Can 250 watt solar panel charge a 200Ah battery? ›
Are you asking how many hours of full sun would be required to charge the battery? Assuming you have the proper charge controller and everything is 100% efficient, your 12 volt 200 Ah battery needs 2400 watt hours. (12 * 200). If you panel can provide 250 watts, then in 10 hours it can provide 2500 watt hours.
Do higher Ah batteries last longer? ›Ah hours are a rating of the amount of energy that a battery can store. Typically, the mAh rating is also a measure of the number of hours a battery may last. For example, a 4600mAh battery will last at least 4.5 hours. The higher a battery's amp hour rating is, the longer the battery's run-time will be.
Is a higher Ah battery more powerful? ›So in addition to having double the cells, the 5.0Ah battery also has a higher energy density in each one. In general, higher amp hours mean more runtime and higher voltage means more power.
What happens if I use a higher Ah battery? ›So, higher AH means longer runtime, but not necessarily more power. A higher Ah battery will last longer than a lower Ah battery. The specific AH rating depends on the device's performance and runtime. If you use a higher AH battery, it will run for considerably longer on a single charge.
What is better a generator or inverter? ›With engine sizes of up to 10,000 watts, conventional generators can create more power than an inverter generator. Although inverter generators can't produce as much power as conventional generators, they are more efficient due to how the energy how the AC current is produced.
What appliances can run off an inverter? ›electric lights, kitchen appliances, microwaves, power tools, TVs, radios, computers, to name just a few. You just connect the inverter to a battery, and plug your AC devices into the inverter ... and you've got portable power ... whenever and wherever you need it.
What is the best battery to use with an inverter? ›Lead-acid batteries: These are the most common types of inverter batteries used. They are one of the oldest types of rechargeable batteries.
How many batteries do I need for a 1500 watt inverter? ›One battery will support a 1,000 watt inverter, two can support a 1,500 watt to 2,000 watt inverter, three will support a 3,000 watt inverter.
How many batteries do I need for a 2000 watt solar system? ›Helpful Expert Reply: Typically two batteries are needed for a 2,000 watt inverter like the part # 34278156 that you referenced.
What size battery do I need to run a 1000w inverter? ›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.
What happens if you connect a battery to AC? ›
If you connect an AC supply to a battery, the battery will only charge the half-positive cycle and discharge through the negative half cycle. Therefore, to answer that if the car battery is AC or DC, it is DC. Even though it works properly, it can completely discharge without giving any remaining power.
Will a 3000 watt inverter run a RV air conditioner? ›An inverter for that large of a system used to power air conditioning is going to be extremely large. For an RV air conditioner, the starting wattage is typically around 3,000 watts. However, you'll want to purchase an inverter between 3,500 and 4,000 watts so you don't max out your inverter.
How much solar panel to run air conditioner? ›Solar Power for Window AC Unit
Window AC unit of 5,000 – 6,000 BTU uses around 500 watts an hour and would require 900 – 1000 watts of solar power. The required solar power can be obtained from 3 x 300-watt or 4 x 250-watt solar panels.
No, there is no limit to the number of solar panels you can have. However, there may be a limit on how much power your system is allowed to generate. Some utility companies limit the amount of electricity that a grid-tied solar system can generate.
Can you have too many batteries for solar? ›You can have multiple solar batteries. Those with especially high energy usage may install 2-3 batteries. Usually, however, the average UK home will only add one battery to their solar system.
How many batteries can a 400 watt solar panel charge? ›The number of photovoltaic cells in a solar panel varies depending on the wattage. A 100-watt solar panel uses 100 cells whereas a 400-watt solar panel has around 160-170 cells (typically 180 cells).
How many batteries do I need to run my air conditioner? ›If you are using an inverter with a battery, you do not need a high capacity battery because the inverter can share the load. So in conclusion, depending on the length of your AC usage, a 1.5 ton air conditioner requires four batteries of 150 AH to run three to four hours of AC without a problem.
Can a lithium battery run an air conditioner? ›Even though lithium batteries offer more available power off-the-grid, an AC units draw too much power for most battery banks to handle. It's not recommended you run your air conditioner off grid unless you have a generator.
How many amp hours does it take to run an AC off the battery? ›By multiplying 25 Amps x 12 Volts, you find out the air conditioner uses 300 Watts. The batteries will need to deliver 25 Amps to run the air conditioner (300 Watts/12 Volts = 25 Amps). Let's say you have a 100A. H battery for your system that is 12 volts (push) and 100 amp hours (storage capacity).
Can you plug 2 solar panels into a battery box? ›What about connecting multiple solar panels to one battery? You can connect them in parallel, providing your battery management system can handle the maximum input power.
How do I calculate how many solar panels I need for my battery? ›
- Battery bank size (kWh) = Daily energy use (kWh) x Number of days of autonomy / (1 – SOC)
- Battery bank size = 1.9 x 3 / (1 – 0.5) = 11.4 kWh. ...
- Amp-hours = 1000 x Energy storage (kWh) / Battery Voltage (Volt)
- Amp-hours = 1000 x 11.4 / 24 = 475 Ah at 24 Volt.
In full sun condition 200 Wp panel will take 12 hours to completely charge the 200ah/12v Battery. So if you have to use battery backup on daily basis then it is not advisable to connect 200Ah battery to it.
How long will a 200Ah battery run a TV? ›If you have a 200ah battery, it can supply 20 continuous amps for 10 hours or 10 amps for over 20 hours.
How much does 200Ah battery cost? ›KSh 40,050
Totally Sealed Construction - advanced sealing design ensures leak proof, maintenance-free operation, and freedom to mount in any position.
If you want to keep the power on when the grid is down, you'll usually just need one solar battery. If you want to go off-grid completely, you'll need far more storage capacity, more along the lines of 8-12 batteries.
Can solar panels power a house during a power outage? ›Solar panels alone won't work during a power outage—but when paired with solar battery storage, they can. See how solar battery storage keeps your solar systems working during an outage with reliable, renewable solar power, and why we need clean energy now more than ever.
How long will a 200Ah battery run an appliance that requires 400W? ›You get the result: A 200Ah 12V AGM deep cycle battery will run a 400W device for 4.80 hours (that's 4 hours and 48 minutes). With this calculator, you can estimate running time for pretty much any battery.
Is it better to have 2 100Ah batteries or 1 200Ah battery? ›A: As far as capacity goes it's the same. However, 2 100 ah batteries would be better than 1 200 ah battery. This is because if anything ever happens to the 1 200 ah hour battery your screwed until you get another… see more. However, 2 100 ah batteries would be better than 1 200 ah battery.
What size inverter do I need for a 200Ah battery? ›Q. What size inverter do I need for a 200Ah battery? A new 200ah lead-acid battery connected to a 12v inverter, will last 10 hours if discharged with a load of 150 watts at 80% efficiency and depth discharge.
Can a solar panel be too big for a battery? ›
If the batteries are deeply discharged, the PV panels will have a large deficit to replenish and may not be able to catch up. An oversized solar battery could also lead to chronic undercharging and poor performance and lifespan.
What size battery is needed to run a refrigerator? ›A typical Energy Star Refrigerator that consumes less than 300kwh per year, may be able to run on a fully charged 12 volt 100 amp hour storage battery for 30 – 35 hours. This varies with the ambient temperature surrounding the refrigerator and the efficiency of the DC to AC power inverter that is being used.
How many Ah do I need to run my fridge? ›Minimum Power Needed for a Residential Fridge
The minimum power for running solely the residential fridge for 24 hours is six AGM batteries totaling 600 amp hours (300 ah usable). PLUS you need 600 watts of solar power on the roof to replenish the batteries during the daylight hours.
How long will a 12 volt battery run a 12V refrigerator. If you're using a Lead Acid battery, you can only discharge to about 50% without causing damage and shortening battery life, so with Lead Acid batteries, you'll get about half that run time, or 12 to 25 hours.
How big of a battery bank do you need to run a house? ›A 400 amp-hour 6 volt battery can provide around 2.4 kilowatt hours of power. A three-day battery bank planned to provide 90 kilowatt-hours of electricity to an average American household. The previous example battery can provide2,4 kilowatt hours, while 38 batteries would be needed.