Construction of a 144 sqm bungalow in Fichtenwalde (near Potsdam)

2021-11-23 09:24:52

As far as I know, installation is at least included then. However, usually with up to a 60% surcharge.

2021-11-23 09:35:48

Morning.

I am currently dealing with the electrical system and smart home. We received our first offer quite a while ago. It is not supposed to be an elaborate KNX system but rather some gimmicks where you can control things like lights, heating, blinds, video doorbells, possibly also cameras with a phone/panel. I watched the Busch-Jäger system on YouTube and I am not opposed to it. What do you think about it?

What confuses me a bit and “annoys” me is that the devices the electrician suggests are about 20-40% more expensive than the purchase prices I pay as a consumer. I understand the problem with warranty, etc. And I would accept a 10% surcharge without complaining. But some prices are 40% higher. Of course, installation costs come on top of that...

Example: Busch-Jäger panel. Purchase prices according to Google about €350 gross. Price from electrician: €478.62 = 36.7% surcharge...

I can tell you a great example from our construction.
Surcharge for a better toilet bowl at the wholesaler €35 net. With the plumber then €50 to €60 net and with the general contractor €85 net.

2021-11-23 09:37:38

The general contractor also needs to make some money, or are you doing the electrical work by direct contract?

I'll give you an example.
Under the general contractor, screed insulation, foil edge strips with screed laying costs 48€/m2 (from a known source)
In direct contract, it costs 32€/m2

I myself laid styrofoam, foil, expansion joints, etc. costs then 25€/m2.
With 290m2 it was a good saving for 3 days of work

2021-11-23 10:18:58

The main contractor also has to make some profit, or are you doing the electrical work yourself?

I'll give you an example.
Through the main contractor, screed insulation, foil edge strips with laying the screed costs €48/m2 (at an acquaintance)
Doing it yourself costs €32/m2

I laid styrofoam, foil, expansion joints myself. Costs then €25/m2.
With 290m2, that was a good saving for 3 days of work

It is not through the main contractor. The "standard" is set with the main contractor, who already had a rather upscale one. Otherwise, the main contractor says that we should arrange extras with the tradesmen ourselves, otherwise it will be more expensive than if we do it through him. The offer I submitted comes from the electrician. There is also another item: assembly services.

What do you generally think about subcontractors? Can quite a few things be passed on to them? Philips Hue and Alexa work, as I have found out.

2021-11-23 11:08:22

I also think that a 30% surcharge compared to internet prices is completely normal or the surcharges are sometimes even higher. Usually, electricians don’t even get the material from their wholesaler at the internet price. The Busch Jäger system, to my knowledge, is based on KNX. However, the configuration is "end-user-friendlier". The disadvantage compared to "normal" KNX is that you can only use components from BJ and do not have the entire variety of KNX available. Therefore, you are actually well served with BJ and could theoretically switch to KNX in the further future if BJ should discontinue the Free@Home program for some reason. The offer currently only includes the roller shutter control (with decentralized actuators). However, you now have to consider what you want beyond that. The wiring requirements are ultimately analogous to those of a KNX installation. So either star wiring or bus cable + decentralized actuators. Apart from radio extension.

2021-11-23 11:18:26

I also think that a 30% surcharge compared to internet prices is completely normal, or the surcharges are sometimes even higher. Usually, electricians don't even get the material from their wholesaler at the internet price. As far as I know, the Busch Jäger system is based on KNX. However, the configuration is more "end-user friendly". The disadvantage compared to "normal" KNX is that you can only use BJ components and do not have the entire variety of KNX available. Therefore, you are actually well served with BJ and could theoretically switch to KNX in the further future, if BJ should discontinue the Free@Home program for some reason. The offer currently only includes the roller shutter control (with decentralized actuators). However, you now have to consider what you want beyond that. The requirements for the wiring are ultimately similar to those of a KNX installation. So either star wiring or bus cable + decentralized actuators. Apart from wireless extension.

My idea would be, as I said, I am an absolute layman and it is supposed to be more of a "plaything". - Connect BJ smoke detectors - Lighting: Philips Hue - If possible also control of the heating - Video doorbell. The question is which one I can take (eufy Video Doorbell 2k?). - Possibly also the outdoor cameras right away (I like the following: eufy Floodlight Cam 2 Pro) - Roller shutters.

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Construction of a 144 sqm bungalow in Fichtenwalde (near Potsdam)

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