• Home
  • EV News
  • Podcast
  • Videos
  • Vehicles
    • Sales
    • Electric Cars
    • Tata Electric Cars
    • Electric Scooters
    • OLA Electric
    • Electric Cycles
    • Electric MotorCycles
    • Electric Cargo Vehicles
    • Campus Vehicles
  • Categories
    • Debunking EV FUD
    • Real Life EV Stories
    • Community Charging
    • Buyer's Guides
    • How To Guides
    • EV Test Reports
    • EV Travelogues
    • EV Conversions
    • Events
    • Educate
  • Community
    • Discord
PluginIndia Electric Vehicles

Okinawa Praise e-Scooter : My thoughts

21/12/2017

61 Comments

 
By Sonendra Singh
Okinawa Scooters ​launched the Okinawa Praise electric scooter to critical acclaim especially with its specifications.  Look at these numbers!
  • 3 units of electricity to go 175 km
  • 75 kmph top speed
  • 22 degrees gradient climbing ability
  • Tubeless tyres
  • Li-Ion battery pack option
Here are my thoughts that include some of technical analysis on the motor power, battery and range.
Picture
Okinawa Praise will give you a feel of real time 2 wheeler vehicle with very good top speed of 70-75 kmph, attractive and a strong body chassis and build quality.
You can easily do 50-75Km per day, which is enough for daily city commute.  Although the company claims 175-200 km per charge.


Power
​With 2.5KW max power (3.3HP) you will get pretty good pickup acceleration (almost equal to petrol based scooty) and
top speed of 70-75 kmph. On city roads more than 50-60 kmph speed is generally required to overtake an auto rickshaw or a city bus.
So basically you will not feel helpless with this electric scooter.
Normal high power (1KW/1.5KW) electric two wheeler has max 50-60 kmph speed and cannot overtake a speedy auto rickshaw/bus.

Handling
Wheels on the Okinawa Praise are 12 inch and will be better for road with potholes. Generally electric two wheeler wheel size is 10 inch.
Basically you will not feel much difference in terms of handling and get a better balancing/handling because of low centre of gravity due to   battery position on the low side.


Battery
Praise with 72V 45Ah VRLA battery will be heavy, although kerb weight is not mentioned on its website, but weight of six 12V 45A VRLA battery would be around 90 Kg, so expected weight would be around 150Kg, like a Royal Enfield Bullet.
Okinawa Praise with Li-Ion battery would be less heavy with respect to IC engine based two wheeler. I feel that the expected weight for a Li Ion battery based Praise would be 80-95 Kg.
But cost of the 72V 45Ah Li-Ion battery pack price is around 1 Lac in India.
I think Li Ion version will be 72V 20Ah battery based, with overall price 80 thousands to 1.1 Lac without subsidy. You can figure out the expected on-road price after subtracting the subsidy amount and adding the taxes, registration charge etc.

If we compare the Okinawa Praise with currently available electric two-wheeler. Overall this product can give an actual competition to present IC engine based two wheelers.

Range
For an electric vehicle, range is one of the important parameter. Range on a single charge is dependent upon the different factors like temperature, discharge rate etc. Almost each vehicle has a most economical speed (basically it’s a discharge rate of battery) for best range. At high speed (higher discharge rate of battery) means more drag effect and power losses in electrical system (from battery to motor). So overall range on single charge gets reduced at higher average speed.
Picture
Above analysis is not based on actual ride (data). There may be variation in parameters. I have tried to do a close analysis, but some specifications like curb weigh, battery weight are not mentioned on its website. So we took these specifications from other similar products, which should be close to the actual product.

Note
  • 72V 45 Ah lead acid based battery system. Battery type is VRLA 12V 45Ah, total six 12V batteries in series for a 72V system. Single 12V battery weight is considered 14.8 Kg, so total batteries weight would be around 90 Kg.
  • Vehicle (battery) should be fully charge and then discharge upto 64.8V volt during the above range test. Almost fully discharge, 72V VRLA battery, which has 36 cells in series, average voltage of a single cell would be 1.8V.
  • Kerb weight should be 145-160Kg.
Picture
Following parameters are not available:
  • Weight of the vehicle (Kerb weight ?) 
  • Peak power. Although max power is mentioned 2500W
  • Battery Charger specifications (Output power??)
  • Regenerative braking??
Other Observations
  • Wheel: 12 inch. That’s good for roads with potholes, basically much better than 10 inch wheel.
  • Brakes: Front dual disk on a single side and rear wheel single disk brake
  • Chassis body: Looks impressive, should be better than available Electric two wheeler and equivalent to petrol based scooty in strength and handling
  • Motor: Max power is 2500W. Although motor is mentioned 1000W. Generally BLDC motor can be overpowered for a short duration. I think, motor can deliver a high power to overtake a BUS or other vehicles. I have an electric scooty and  2-2.4KW power from battery to motor controller is required  to maintain a constant speed of 75Kmph with gross weight (vehicle + rider) around 170Kg. So, motor power of Okinawa Praise for 70-75Kmph should be 2.5KW.
  • Battery: lead acid batteries, 6 units of 12V 45AH Amptek VRLA battery, expected total weight of VRLA batteries around 90Kg. Specification of Li-Ion battery is not available. Somewhere its weight 9 kg is mentioned but not on its website. I think with 9Kg weight, Li Ion battery for a 72V system would be a 72V 20AH battery pack.
  • Range: with Lead acid (VRLA) battery is already mentioned in details. As of now Li-Ion Battery specifications are not available for Okinawa Praise, so there no point to do range vs speed analysis.
61 Comments
saket
26/12/2017 09:46:24 pm

I have find this vehicle very much compared to any High end Scooter like Grazia/Vespa.

Currently i am having hero electric Optima with VRLA battery. but after using it for 1-1.25 years then Ranges goes to almost half. Thus I feel Its very high time, someone will able to use it for 200( even 150km) with Praise.

I am very much disappointed that what is target market. Are they looking only those office goers with 10Km+10Km. and keep on changing only in weekend.

Then only its going to replacment for scooty/activa/jupiter.

but after 1-2 years once battery performance goes down, it will give good shock to all user by seeking replacment battery cost. which will almost 30-50K. this will offset all savings done and again people will shift for IC engine.

because people mindset is not tune to spend 10/20/30k at once, ans spend zero for maintenance/oil change.

If something like lease finance of battery with EMI per month then can be suitable for indian buyer.

I hope li-on Praise doesnt cost more than 1 Lakh on road price. then also Activa buyer wont change their mind.

Reply
PluginIndia
3/1/2018 04:31:40 pm

Do understand that Lithium batteries have a charge cycles of around 1200. Compared to Lead Acid batteries - which has around 300 charge cycles

So replacing a Lithium-Ion battery would be done after 5+ years. By then Li-Ion battery prices will come down.

Reply
Pawan Kumar
27/3/2018 06:15:12 am

Mai y battery Kha se le sakta hu hr gurgaon

Ashik
2/10/2018 05:40:32 am

Hero is not a match with Okinawa hero is an Indian company that makes below quality products so hero batteries won't last long Okinawa is not like that

Reply
kdjfaosdf
2/11/2018 10:55:47 am

Okinawa is also Indian company

Genuine Power link
3/4/2020 10:52:37 am

We are currently Offering This battery in Lifepo4 Lithium phosphate for 29000/- for 45 ah with 170Km range(as per company) and 49000/- for 72ah 290 km range (as per company). PM me if interested on [email protected]

Reply
Laxmikant Pujari
15/5/2020 04:41:15 pm

Need urgently

Rahul Patil
1/6/2020 10:05:42 pm

Mob no 9404565455

Sk salim link
25/6/2020 10:14:30 pm

I would like to buy 72v 45ah lithium phosphate batery and what is the guarantee and warranty

Altamash Yusuf
20/8/2020 06:02:30 pm

Sir I have Okinawa praise lead acid which is 2years old...and battery is totally dead with in 16000km...I need a best solution or option for battery exchange

Charan
26/8/2020 07:12:46 am

I need 72v 45ah battery for Okinawa praise

Prasanna link
29/10/2020 10:34:29 am

Please let me know your contact number
We need LFP battery with 31Ah

Sandeep reddy
1/11/2020 10:37:31 am

72v lithium ion battery

Jasmeet singh
26/12/2020 03:08:09 pm

Can you please arrange one battery 12 v 45 ah (trontek ) for 2018 model praise okinawa. Please call 7814071000 if possible. Thanks.

lalit
4/8/2021 09:04:22 am

i need this

ATUL SINGH
15/2/2022 03:05:11 am

72volt 36 or 45 ah

Ganesan
25/4/2022 12:41:01 pm

72v 45ah lfp battery pack for Okinawa additional battery

Anand
10/5/2020 04:16:45 pm

6 Batty pack

Reply
Jai Bhagwan link
23/10/2020 08:37:37 am

6pice 12v 45ah

Vatsal
13/12/2020 03:46:20 pm

Very true. Facing same problem.

Reply
vinod Bhaskaran nair link
28/2/2021 07:01:42 pm

Tyst drive has LFP battery pack for good price. 72v 30 Ah for 55000 INR.

Reply
Ram link
7/6/2023 07:56:41 pm

Never buy any Okinawa scooter

Reply
SAURABH CHANDRA
30/12/2017 09:59:38 am

Hi! Will the lithium ion battery increase its speed too? I have heard that nothing can surpass li ion in performance

Reply
Anith Alex M
25/11/2018 01:27:56 pm

Will reside weight.. hence increase pickup and speed than usually with led battery

Reply
Sateesh Reddy
3/1/2018 04:33:34 pm

Hi Sonendra

Thanks for the great blog!

What is the advantage of going for a 72 V system compared to a 48 V system?

And would you recommend the Lead Acid or Li-Ion pack , if one wants to go for the Praise?

Reply
Raghwendra singh Parihar
13/8/2018 11:11:37 pm

The advantage is that when you go for higher voltage the losses are reduced. Thus making it more efficient.

Reply
Priyank Anand
10/9/2018 02:55:19 pm

Going for high voltage reduces the amount of heat generated in electrical system. As high voltage will result in low ampere thus leading to less heat. Basic Physics

Reply
Anubhab kundu
8/10/2018 07:31:08 pm

Hi Satish! I introduce myself as an electrical engineering guy, hence i can tell you that more the system voltage, more the speed. 48 V scooters are limited to 25-30 kmph speed. 60 V scooters can easily do a 45-50 kmph and this is OMG! 72 V! Thus you can well imagine 72 V system can give much better speed upto 100 kmph (eg in Tork T6X). Now for the same kWh storage, increasing the voltage means reducing the Ah rating, since Voltage x Ah = Wh/1000.

Reply
Kiran dhande
24/1/2018 04:02:06 pm

Prices of lithium ion battery for Okinawa praise if replace or purchase new battery for extra support please comment

Reply
Rintu
30/3/2018 07:51:26 pm

Appreciate your effort in devoloping such a detailed report on the hot cake of the Indian Electric Scooter market. Please keep it up.
While going through the comments, I found some queries which I thought I could answer. Please correct me if I am wrong or I miss something out..


@Saket

For an average scooter rider who rides the bike for around 20-30km at a decent speed, specification figure indicates that it will be necessary to charge the vehicle once in 5-6 days (200km/30km=6.66 days). If battery life cycle is 300 (300-700 for vrla batteries), estimated life is 4-6 years ((5*300)/365). But one more factor to be taken into consideration is the riding style and preferred acceleration.

I definitely agree with you that a flexible EMI plan by the company or some third party/government organisations will definitely prove to be benificial both to the user and the company.


@Saurabh Chandra

No, the speed will not increase because it depends on the maximum bldc motor capacity (Power) and the limitations of the motor controller. It definitely will increase battery life which is also a huge plus.


@Sateesh Reddy

Though the momentary power draw by the motor depends on the position of the throttle, the maximum power of the motor is considered constant.

Power = Voltage × Current
Maximum power is constant at 2.5kW=2500W

If Voltage = 48v clearly, Current = 52 A
Copper wire thickness = 6mm.sq

If Voltage = 72v, Current = 32 A
Copper wire thickness = 4mm.sq.

Higher current = Thicker conductor (wire/cable)

So the whole system has to have wires of the mentioned thickness.
Using higher voltage reduces size of wire thus reducing weight of system and, reduced size of motor. Most important of all, it costs you less money.

*There are other in depth factors which also comes to play when determining the operating voltage of the system.

Reply
Anirudh
2/4/2018 05:01:00 pm

I have seen a review of it by NDTV Auto youtube. They were saying that lithium ion variant of praise will be expensive by 7 to 8 k. So that takes our cost to 68k and 75k onroad price. Also do you know what subsidy amount does Govt. provide.

Reply
tuhin
16/4/2018 09:55:04 pm

wanna to know longivity of battery pls and if spare patrs available in market

Reply
Ajay Gupta
25/9/2020 03:06:29 pm

Company not providing service

Reply
Dillip Chaudhury
23/4/2018 05:46:08 pm

Vehicle torque not mentioned...

Reply
Rakesh choudhari
9/5/2018 01:43:52 pm

Li ion is best opstion

Reply
Basavaraj s koppad
21/5/2018 11:50:30 pm

What is the cost of praise

Reply
Jayakumar V
25/5/2018 09:40:08 am

OEM can provide buy back with best price. It can reduce surge on customers. Buying itself they can confirming about buyback in percentage.

Reply
Karthi
2/6/2018 10:43:00 am

Hi,

Great blog and an in-depth coverage of the bike.

I just have a question and though it might sound funny/dumb but I couldn't find answer anywhere else. How do you charge the bike when you live on high-rise building. Has anyone gone through that and found a solution? Anyone living in ground floor don't have this problem. If anyone has insights please do share.

Reply
PluginIndia
2/6/2018 11:19:29 am

We recommend you to read this
http://www.pluginindia.com/blogs/apartments-and-electric-vehicle-charging

Reply
Anubhab
8/10/2018 07:36:53 pm

Lead acid battery packs cannot be removed from the vehicle. But li-ion battery is a compact and portable pack. So for people living in skyscrapers, in Mumbai, for them, they can remove the pack, carry it by the handle and charge it inside your house. It is said that these packs DO get an SoC indicator, to show how much SoC is there. These people have put the BMS (or battery equalizer) into the pack itself. After you are done charging, you can put the pack back into the vehicle, then put in the connector plug, and turn on the MCB.

Reply
Gsd
22/7/2018 12:05:08 am

What is the cost of lead acid battery for this scoot

Reply
Bala
27/8/2018 07:14:41 am

How many kilometre will be run the battery ,battery lifetime how many kilometres example one day 70 KM , how many day will come the battery life.(60/hr×70km /day= ?,
8825953519callme)

Reply
Yogesh
10/10/2018 04:51:44 pm

Okinawa praise ki battery replacement cost kitni hogi and battery life kitni hogi?
Li ion as well as lead acid ???

Reply
Dev
24/10/2018 05:25:47 pm

battery replacement cost kitni hogi

Reply
Anith Alex M
25/11/2018 01:49:48 pm

As per information from shop ..

Reply
Aaron Lal link
27/10/2018 12:18:03 pm

Thanks for such a great blog. I appreciate your efforts for such a detailed report. Was surfing the net and get to this blog hours ago. Find it useful. All the very best!

Reply
Vishal link
31/10/2018 04:59:47 pm

Kya Government ab subsidy nahi de rahi hai Okinawa pe

Reply
Sudhirgv
3/11/2018 11:45:37 pm

Thanks for ur information and tell about battery life time and cost of the battery

Reply
Abhi
12/11/2018 04:23:52 pm

Okinawa praise ki battery ek bar charge karne par kitne din chalti hai

Reply
Rajesh
27/12/2018 10:01:41 am

Onroad price of praise li ion without subsidy and after subsidy?
Cost of li ion battery..?(complete battery of scooter)
Average life of lithium ion battery of praise
Pros and cons that help the buyer to take informed decision

Reply
Prashanth
24/2/2019 10:27:20 pm

What if I charge led acid battery for more that 10hrs.. Okinawa praise vehicle.

Reply
DURGA GHOSH
5/4/2019 09:09:51 pm

i think this is exclent scutter for us.all every things avlable in this byke..what not .

Reply
LOGANATHAN G
8/5/2019 09:29:03 pm

I m a Owner of ipraise, is generally good. Not what they say.
Battery compartment unsecured. Battery jumping up & down. Fear may be damaged. They hv to do a lot to secure battery. Economy speed <35 - Range <100Km. BMS is very good. Vehicle driving is not comfortable - Seat is very clumsy for an hour drive Aches. If they listen to the customers will be catch up the rank. I wish them Good Luck.

Reply
Ashok
2/6/2019 02:30:07 pm

Plz send me lowest model rate

Reply
Alok
9/6/2020 12:35:02 pm

I want to buy praise lead acud cintroller

Reply
Ajit singh
5/9/2020 11:12:45 am

I needbty 12v45ah qty 6


Reply
Pawan
23/12/2020 10:39:40 pm

I want to buy a lithium ion battery 72 volt 45AH for use in Okinawa scooter get price with Home delivery at kurukshetra Haryana

Reply
anthony lopes
19/1/2021 08:26:32 am

I was cheated by this okinava as my okinava praise scooter i paid 86000 and it did not last even for one and half year so all those working statistic are wrong and for that amount it is a wrong buy and they simply do not care and they will not respond and that are aware the judicial system is beyond reach for the gullible indian consumer so they take advantage

Reply
NILESH
9/5/2021 02:33:09 pm

I COMPLETED 2.5 YRS. KM 19480. NOW SUDDENLY SHOWING CHARG DOWN AFTER 5 KMS.
DEALER WAS TOLD 1000 CYCLES...MEANS AOBOUT 45K SHOULD BE THERE FOR LEAD ACID.

Reply
Kavyansh joshi link
20/7/2021 09:11:10 pm

Plz help me I have Okinawa praise and I need 6 batteries to start my scooter again . My scooter is standing since 1 year because of 12v45ah battery is too much costly and I don't have that much amount to buy the battery .

Reply
Dillip Kumar Panda
27/9/2021 08:20:29 pm

All e vehicle are waste because company doesn't provide services about battery. It's also high cost. I have a ebike Okinawa last three years . It costs more than petrol bike.

Reply

Your comment will be posted after it is approved.


Leave a Reply.

Plug in india

About us
Advertise with us
Contact us

Privacy Policy
Terms of Service

Support US

Get access to exclusive perks
  • Become a YouTube member
  • Become a Patreon

Subscribe to our newsletter

© COPYRIGHT 2019. ALL RIGHTS RESERVED.
  • Home
  • EV News
  • Podcast
  • Videos
  • Vehicles
    • Sales
    • Electric Cars
    • Tata Electric Cars
    • Electric Scooters
    • OLA Electric
    • Electric Cycles
    • Electric MotorCycles
    • Electric Cargo Vehicles
    • Campus Vehicles
  • Categories
    • Debunking EV FUD
    • Real Life EV Stories
    • Community Charging
    • Buyer's Guides
    • How To Guides
    • EV Test Reports
    • EV Travelogues
    • EV Conversions
    • Events
    • Educate
  • Community
    • Discord