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How big a battery pack should I use for a 8000w motor

How big a battery pack should I use for a 8000w motor

One of the difficult challenges in planning an EV conversion is choosing the voltage and size of the battery pack you plan to use. This following page aims to simplify that process explaining how each...

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8 Best Battery Packs for Power Recliners | Reviews

Battery Size and Design. which can help extend the battery life of the product while making the battery pack easy to use. Furthermore, you can charge the battery pack while using the recliner, an additional feature that is quite impressive for the price. Furthermore, it offers up to 900 single-motor cycles on a full charge, making it

Oct 28, 2025
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Ordered a Realmax 13” e scooter 60v 8000w 100ah Panasonic battery

Ordered a Realmax 13” e scooter 60v 8000w 100ah Panasonic battery, anything i should be looking out for when i start riding the e scooter around? assuming the scooter factory buis the battery already assembled they would probably pay abauth 1000€ per battery. Add abaut 150€ per motor, 60€ per controller and 300€ for the frame and

Dec 23, 2025
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Calculating Battery Requirements for an 8000W Solar Inverter

Use this formula to calculate your required battery capacity: Required Battery Capacity (Ah) = (Energy Consumption per Hour (Wh) × Backup Time (hours)) / (Discharge Depth × Battery Voltage (V)) Battery Chemistry and Recommendations. The type of battery you choose can significantly impact the performance and longevity of your solar energy system.

Oct 16, 2025
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Ebike batteries for qs273? : r/ebikes

Im new to building ebikes. Im looking for a battery that will fit the old stealth bomber kit. I ordered a qs273 motor with 19" wheel, rated at 8000w (based on seller description). Im hoping to get highway speeds (55+). my question is, where can I get a battery capable of driving that motor, and how much should I expect to pay for it?

Jan 12, 2026
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What voltage battery should I get for a 3000w e bike : r/ebikes

Also, you have to consider the Kv of the motor you''re using. If you have a motor with a Kv of 7 and you apply 52V, nominal RPM will be at around 33 mph. If you apply 72V to that same motor, nominal RPM will be around 46 mph. Since motors are most efficient at around 75% of nominal rpm, you''d have optimal speeds of 25 mph and 34 mph respectively.

Jun 28, 2026
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What Size Battery For 1000w Ebike: Ultimate Guide

In order to unleash the full power of the 1000W motor, a larger battery is required. Typically, a 48V battery is equipped with a 1000W motor. But the 52V battery works better in order to achieve the maximum potential of the

Dec 31, 2025
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What battery range in Volts should I use for this 8.4V motor?

The short answer, if that is an 8.4V motor, is that it can be used on 7.4V and probably can be used on 9.6V. It probably won''t produce the same power and RPM on 7.4V that it did on 8.4V and at 9.6V it may overheat unless you keep the input voltage at 8.4V or lower by using an ESC (electronic speed controller).

Mar 07, 2026
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How to Size Your BATTERY: Beginner to Engineer

When assembling a battery pack you should use just one type of cell and balance them before assembling. Note that wiring in parallel cells which are not at the same voltage may make the

Feb 19, 2026
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How to connect DC motor to battery pack? Do I need a fuse for

To Besoeker''s point, AA batteries are good for a constant draw of 50mA (0.05 Amps) each. You have 8 of them, but you have them in series to get to 12V, so the current draw remains the same, 50mA just at a higher voltage.

May 29, 2026
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Calculate Battery Size For Any Size Inverter (Using Our Calculator)

Here''s a battery size chart for any size inverter with 1 hour of load runtime Inverter Size How Many 100Ah (Lithium) Batteries to run for 1 hour (100% DoD Limit)

May 06, 2026
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Lookup Table: Motor & Prop Sizes, KV, Battery Cell Count, and

Discover the ideal motor size, propeller size, KV, and LiPo cell count for your FPV drone build with our comprehensive lookup table. Start building now! Motor Size Motor KV LiPo Battery mAh Dry Weight; 31mm (1.2") Triblade: Tinywhoop 65mm: 1S: 0702, 0802: 23000-30000: 260, 300, 450: 16-22g: 31mm (1.2") Twoblade: Tinywhoop 65mm: 1S: 0702

Jan 15, 2026
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How can I connect many brushless motors to a big battery pack

Usually brushless motors comes with indications on how many batteries you can connect to them, it is common to to see 2x3 battery packs where each battery provides 3.6 Volts or so to power a single brushless motor. However I fear things are not that simple when putting much more stuff in parallel. Let''s assume I have a battery with . 9000 mah

May 18, 2026
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Basics: How Do I Choose a Battery?

Medium sized mobile robots tend to use one 12V battery; lead acid or single NiMh battery pack (or an 11.1V LiPo battery if weight is an issue). Large robots use 12V or 24V from one or more lead acid battery packs. Chemistry NiMh: This is by far the most common type of battery used in mobile robots. NiMh batteries are rechargeable and their

May 02, 2026
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QSmotor 8kw, how big battery needed? | Endless Sphere DIY EV

I have a V4 QSmotors 8,000watt hub with an ASI BAC 8000 driving it. I bought 11 Nissan Leaf Cells and should have the battery together soon. I believe my pack will be

Oct 21, 2025
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Inputs to Pack Sizing

Lets look at the list of inputs required to establish a battery pack size, headings and comments on what you need to know before you start.

Dec 13, 2025
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Calculating Battery Requirements for an 8000W Solar

The battery capacity is measured in ampere-hours (Ah) and determines how much energy your batteries can store. To determine the right capacity for your 8000W solar inverter, you need to consider two vital factors -

Jan 15, 2026
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Which battery should I use for an brushless motor

A matched motor driver for. A matched motor driver for that motor said it can use a 2-4 cell battery, so 7.4V to 14.8V battery.

Sep 28, 2025
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How do I calculate what size wire needed when building a battery pack

I''m building an e-bike battery with a peak draw of 25A, continuous will be more like 5-10A. I am using 18650 batteries. It is going to be 8p13s for a total of 54.6v at approx 15AH. I''m using 12AWG copper wire of about a foot in length for the load leads on the battery pack. I have purchased this BMS and it''s on its way to me:

Aug 10, 2025
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batteries

I want to run a 24vdc gear motor 180W 11.5 amps just for 20 mins everyday.The motor spins an 80 kgs drum. 1)What battery size should i get? ( watts amps and volts), Also what type of battery should i get eg: li-on,deep cycle etc . 2)Also i need to charge this battery on solar, would a 50 W panel and a charge controller of 40 amps be fine?

Sep 28, 2025
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Sizing of motor and battery pack for an automotive electric vehicle

Battery requirement of the BHT is calculated as [4, 9] Required current per hour by the battery = I continuous * t (11.9) I continuous (Motor) = 4.60 A Time = 1.5 h Required Current per hour by

Feb 13, 2026
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Whats the criteria for selecting a battery based on motor and

The battery AH rating should be chosen based on the motor power rating ÷ motor voltage rating x 1hr. A 48V 500W motor should be paired with a 48V battery that has an

Feb 08, 2026
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Trolling Motor Battery Charts (+Run Time Calculator)

The run time of trolling motor batteries is calculated by dividing the battery''s amp-hours (Ah) rating by the number of amps the motor draws at a given speed. In our calculations, we assume 80% depth of discharge (DoD), which means the battery will still have 20% remaining capacity.

Mar 17, 2026
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Inputs to Pack Sizing

Lets look at the list of inputs required to establish a battery pack size, headings and comments on what you need to know before you start. Skip to content. Battery Design. from chemistry to pack. Menu. Chemistry. Roadmap; motor & inverter, 12V DC-DC, electric air con, cooling pumps. Discharge Power 10s Peak discharge power [kW 10s

Feb 16, 2026
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What kind of battery should I buy for my trolling motor?

If cost is an issue, you''ll need to do a bit of math to determine how far your maximum travels will be and the minimum size battery to run the motor at 100%, just to be safe. Personally I use a freaking solar battery, 50ah, and it works for 4-5 hours

Aug 12, 2025
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Battery pack capacity calculation for EVs as per our required range.

On a round figure we can conclude that total battery pack capacity required to run a vehicle of 1 KW 60 V motor with 50 kmph speed for 200 KM is 5.85 kWh. This is how we

Jul 29, 2025
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I''m working on a BLDC motor controller for a 5kW unit. I need

In a worst case scenario where your inverter has a PWM duty cycle of approximately 50%, the RMS ripple current through the capacitor will be equal to the DC current coming from the battery. Large motor controllers often need large film capacitors to handle this ripple current.

Jan 13, 2026
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How to use a 60v battery pack on 48v motor

If the controller and battery are too big, yes there would be some chance of cooking the motor. The controller needs to handle the peak pack voltage and needs to have a current limit in the right range for the motor.

Mar 23, 2026
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What type of battery should I use with my hub motor?

One-piece hub motors have a very clean design and do not require an additional external battery pack. However, the range may be limited compared to a separate lithium e-bike battery, and replacement packs can be expensive. Conclusion. In short, for a DIY e-bike hub motor project, a high-quality lithium-ion battery may be your best choice.

Dec 09, 2025
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Whats the criteria for selecting a battery based on motor and

The battery voltage needs to match the motor rating. The controller voltage rating needs to be the same or higher. The battery AH rating should be chosen based on the motor power rating ÷ motor voltage rating x 1hr. A 48V 500W motor should be paired with a 48V battery that has an AH rating of at least 500W ÷ 48V x 1hr = 10.4AH.

May 15, 2026
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batteries

Let''s say you want the battery to run down to no less than half full, so you need at least a 5 Ah battery. Two 12 V sealed lead-acid batteries of 5 Ah capacity or more would do fine. For

Mar 09, 2026
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How to Determine Battery Sizes when using Pure Sine Wave

Stated again, you cannot use a 100 watt inverter to power a 200 watt load because the inverter is not capable of inverting that much energy without causing harm! Use the following formula to calculate the wattage: Volts x Amps = Watts. Once you have the wattage figured out, it''s a good idea to figure out what size battery pack you will need.

Dec 13, 2025
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How to size battery cable for 48v systems?

Main load will be a 48v electric motor that is rated for continuous 150A draw; Specific questions: Sizing of wiring connecting batteries in series (6-12" lengths): planning on 4g; Sizing of wiring connecting battery banks in parallel (12-24" lengths): planning on 2/0g

May 27, 2026
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72V 42AH Super Big Power 10C Discharge Battery for 8000W

72V 42AH Super Big Power Molicel INR21700-P42A Lithium Battery; For 72V 8000W Stealth Bomber FC-1 eBike; 10C High Discharge Rate, Good low temperature discharge ability 2000-8000W Powerful Motor Wheel Kits; Fat Wheel eBike Kits; eBike Electronic. Motorized Wheel; Hub Motor; Battery Size: Size in Photo: Charging Cycles > 1000 cycling

Jun 07, 2026
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What Size Battery For A 500W Ebike: 36v or 48v Battery?

Yes, you can use a 52v ebike battery on a 48v ebike motor but the controller must be compatible or capable of handling the extra voltage. Generally, a fully charged 48v battery provides 52 volts. You must be wondering to know what size battery for a 500w ebike? Well, a 500w ebike motor is powerful, You must have 48v 12Ah battery for the

Feb 01, 2026
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Selecting the correct Battery to match your Motor Setup

This refers to how many specific amps the battery can output for an hour. Say you have a motor drawing 25 amps from the motor continuously without stopping for an hour exactly before the battery dies would mean it can output 25 amps for an hour, or 25 amp hours (25ah for short). This rating is related to range.

Feb 26, 2026
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Selecting the right motor-battery combinations for battery

Battery-powered motor applications need careful design work to match motor performance and power-consumption profiles to the battery type. Optimal motor and battery pairing relies on the selection of an efficient motor as well as a battery with the appropriate capacity, cost, size, maintainability, and discharge duration and curve.

Jun 01, 2026
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What Size Car Battery Do I Need? A Complete Guide To Battery

What Are the Consequences of Installing the Wrong Car Battery Size? Installing the wrong car battery size can lead to various issues, including poor performance and potential damage to the vehicle''s electrical system. The main consequences of installing the wrong car battery size include: 1. Electrical System Damage 2. Poor Starting

Jun 13, 2026
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Sizing your Battery Pack

One of the difficult challenges in planning an EV conversion is choosing the voltage and size of the battery pack you plan to use. This following page aims to simplify that process explaining how each aspect of the pack will affect the performance of the EV. (measured in kWh). As a general guide motor bikes will generally use 75-150Wh/mile

May 15, 2026
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Looking to upgrade parts for my Venom E-X20 Electric

I''m actually using the same motor, these QS motors can handle more power then what they are rated for. Do not do 12000w, been told it will fry the motor. 8000w-10000w should be good to go. You will also have to use Flux Weakening to make the motor go faster. If not it will stop at 45mph and cut out. So make sure the controller you buy has that

Nov 11, 2025
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How do I determine if a battery will adequately power an electric motor

The battery offers max 1280A (for 10 sec), so it offers 1280A*3.2V = 4 kW, so it cannot run the motor on nominal RPM (8.2kW) with 13N-m - even using DC/DC you need more

Feb 28, 2026
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Question here. Would i have more range with a 72V battery with

I have a tsdz2 with a 720wh (48v 15ah) battery and can do 40km @25-30kmh without using the first 25% light on the battery. If you only ride 25kmh, and use only throttle, on a 250w motor with a 500wh battery you would get would almost the same range no matter if it''s 24/36/48/52/72v.

Apr 06, 2026
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Choosing the right BMS

The bms needs to protect the battery, so 100 amps would be the maximum you should use. If you really do pull 60 amps, then you''d pop the bms all the time if you use a 60 amps bms. 80 makes sense to me, but my plan would be to adhere to the cut the c rate in half rule.

Nov 07, 2025

6 Frequently Asked Questions about “How big a battery pack should I use for a 8000w motor”

How do I choose the right battery capacity for my 8000W solar inverter?

The battery capacity is measured in ampere-hours (Ah) and determines how much energy your batteries can store. To determine the right capacity for your 8000W solar inverter, you need to consider two vital factors - backup time and energy consumption. 1. Identify the Desired Backup Time

How much battery pack is required for a EV?

On a round figure we can conclude that total battery pack capacity required to run a vehicle of 1 KW 60 V motor with 50 kmph speed for 200 KM is 5.85 kWh. This is how we theoretically calculate the battery pack required for our EV. This will give you a basic idea of calculating your required battery pack.

What Ah rating should a 48V 500W motor have?

A 48V 500W motor should be paired with a 48V battery that has an AH rating of at least 500W ÷ 48V x 1hr = 10.4AH. This helps assure that the battery will not be over stressed when driving the motor at max power. A higher AH rating will equate to longer range and extended battery life.

How much battery do I need to run a 3000-watt inverter?

You would need around 24v 150Ah Lithium or 24v 300Ah Lead-acid Battery to run a 3000-watt inverter for 1 hour at its full capacity Here's a battery size chart for any size inverter with 1 hour of load runtime Note! The input voltage of the inverter should match the battery voltage.

How many 12 volt batteries do I Need?

Let's say you want the battery to run down to no less than half full, so you need at least a 5 Ah battery. Two 12 V sealed lead-acid batteries of 5 Ah capacity or more would do fine. For simplicity, you could use two 12 V car batteries in series.

How to choose a battery pack for 200 km?

Proper motor selection can only be done after considering parameters like Gross weight of vehicle, Top speed, Drag force, Rolling resistance, Grade, Required acceleration and Regenerative parameters. After selecting the motor we need to decide the range of the vehicle, and here we are designing a battery pack for a range of 200 KM.

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