i came across an article discussing whether older parking structures can handle the increasing weight of EVs. With many EVs weighing over 2 tonnes, that’s significantly more than a typical ice car.

Most high-rise buildings were designed with weight limits based on older vehicle trends. So, as more EVs hitting the msian roads, could this become a structural safety issue?

Am sure developers and engineers already factoring this in for new high rises but for older ones will we start seeing weight restrictions?

https://www.carlist.my/news/parking-structu...evs-93264/93264

Also whether the older high rises electricity capacity are able to handle the increase in electricity demand if more extensions are fixed for increase in EV cars

As an amateur structural eng, this question quite intriguing to me. Usually the carpark structures in Malaysia is design accordance to comply with categories F, which around 3tons weight or 250kg/m2 as an area weight. On top of that we will putting 1.5* safety factor on top to comply with some statistical probable situation as stipulate by the design standard. Hence, I would say nothing much to worry if the building is design and build appropriately to it's function.

I don't believe old buildings cannot hold heavy EV load

I am more concern of the electricity supply capacity and its old cabling

I visited a property showroom in setia wangsa. last week and asked the sales representative about EV charging facilities. They mentioned that the development will have only four public EV charging ports, and installing a private wall charger in individual parking bays or more public EV charging ports is not allowed due to TNB regulations.

Honestly, this feels quite disappointing. With over a thousand units in the development, how can just four shared charging ports be sufficient? It doesn’t seem practical for EV owners.

yeah - good sharing.
din know there is this classification.


anyway... yeah. electricity demand is the main thing.

so a general 7kW (approx 10hp) is equal to 10 nos of 1hp aircond running continuously. and Take note aircond cut in/cut out ( compressor stop when it is cold)
if the car allow 22kW charging- then it will be equal to 30 nos of aircond per car.

so- depends on how many charging bay they are installation.

for new development that each unit have at 1 bay- it should not be issue as they had designed the infra well
but for older one which do conversion.... then there need to upgrade the substation, infeed and TNB even need to pull new cable.

though... any old condo that install more than 10 EV charging points?
10 is not enough right? as more and more adopt EV.

so how can EV go far?

Cable from db is not cheap, how many developer is willing to pay for future demand?

Most out there concern only the lacking of EV charging supports ..none concerns on the safety of EV charging supports..

Blame it on bad luck if one happens to be electrocuted ...due to improper installation / inferior quality/ Worn downs or improper maintenance issues ....

The chance of sabotaging is 0 ?

Is there any standard SOP required or implemented by our Government ?

This post has been edited by SKY 1809: Feb 5 2025, 08:22 PM

Why only speific to EV when some of the 4x4 or MPV like vellfire/alphard also weight more than 2 tonnes? I believe this has not much difference for weight support?

In Malaysia...
Who cares about loading...

All care about charging points...

Which I doubted can hold the load...

Saw one post, saying TNB allow only 4 charging points because of electricity loading...

Our car park building code is based on 5 tons? pressure so yeah should be no issue

1) how many charging ports are considered sufficient? 6? 10? 20? 30? No one can answer. You think 10, I think 2, he thinks 6. The best way is, Majlis should set a guideline e.g. certain percentage of the carpark number shall be used as shared charging bays and all new development to follow (Malaysia Town Planning Department has guideline on it, which is around 2% of total carpark provided). Just like visitor parking, who knows how many parking bay should be allowed for visitor? Majlis will have guideline on it. Same concept should apply on shared charging bays.

2) Those development mentioned TNB not allow more public EV charging ports are BS. Usually these developments did not allow charging bays at the initial design stage, then want to add at later stage, but too late, because all power demand and infra already determined, cannot change anymore, so they blame TNB. If the development already plan ahead at the initial stage, this will not happen. Why I saw some development have 6 charging bays? Some have 8?

To whom concerning structure loading, they should put their concern on the existing power cable capacity and building fire protection.

Ya, I feel the sales person just BS to me . Since this is a new development, I would expect the developer to invest some funds into infrastructure to avoid inconvenience for residents in the next 10 years, especially considering how property prices aren’t exactly cheap nowadays. So I feel this is simply a lack of sincerity from the developer.

Recently, I visited several new projects, and most of them come with 6-10 public EV charging ports, some even more. In my current condo, the previous AGM agreed to reserve 6 more parking lots for future EV charging ports (currently, there are only 2 for 500+ units, and they are not fast charging). They believe this will help increase rental demand and property value in the long run. The demand for EV charging may not be strong now, but EV adoption is a growing trend, and having proper infrastructure in place will be a big advantage in the future.

This post has been edited by freaklosophy: Feb 6 2025, 05:06 PM

Slow charger take a long time to charge. Few cars could be charged in a day.

yeah.... what will be the magic number? it will never be enough right?

say typical condo 500 units have 1000 car. Ok, we say only 60% occupied so 600 cars.
10% EV now, and say the adaptation will increase to be 20% ? (120 cars)

say rough rough.... 11kW take 8 hrs to full charge, and say we charge at 50% so take 4 hrs.
the range from 100% drop to 50% will be around 200+km, means we will charge every 2-4 days. say again average 3 days charge once.

120 car - charge every 3 days for 4 hrs. means 40 car being charge per day.

1 bay can charge how many car per day. if 100% utilization then 6, but my guess gonna to be average 3. This would mean 12 bays.

The question is.... when does people charge? after work, 7 pm until 11pm. They need to be discipline and unplug at 11pm for next round to charge over night. then morning and day time another round- for those not going out 9-5.

that my logic la...correct me if wrong.

the number will go up as the condo is more occupied, and EV adoptation goes higher.

you don't believe based on what basis?

your concern is not invalid. both issues require an equal amount of attention.