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adamcharvet

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Hello people,

I'm installing a Sigma ground mount system for the first time, and need a little advice.

I've been told by the guys from mounting systems GMBH that we can just ram the posts in with a suitable machine - any ideas as to what i need and likely cost appreciated!

However, I've also been warned that there's a risk of bending the posts and that we'd be better off drilling out the holes with a post-hole driller, placing the posts in and then filling with postcrete (expensive but maybe quicker) or a dryish sand/cement mix.

I have the mounting system on order already so am limited to that as an option (i've read the posts about benefits of using concrete base etc and have also used Renusol tubs for smaller installation but this is 30kWp) - I'd appreciate any advice particularly with regard to which option above is the better.

Thanks
 
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R

rob11

  • Thread Starter Thread Starter
  • #2
Alot depends on the ground. Any tree roots/rocks/gravel will cause differculties driving the post into the ground. Then boring the holes might best.
Getting the post straight is also hard in the above conditions.
 

Worcester

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Mentor
Arms
Farmers use a simple hydraulic post driver (typically for fence posts) attached to the back of their tractor, it guides and holds the post so they go in straight and at the required andle every time.
 
A

adamcharvet

  • Thread Starter Thread Starter
  • #4
Hi Worcester,

thanks for that - better check with the farmer if he has the right attachment and hire one if not. Perhaps a combination of drilling, filling and ramming might be the way forward. . .I guess it depends on how hard (or soft) the ground is.
 

Gary K

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DIY
Alot depends on the ground. Any tree roots/rocks/gravel will cause differculties driving the post into the ground. Then boring the holes might best.
Getting the post straight is also hard in the above conditions.
I think you will struggle with the ground being so hard - due to a distinct lack of rain! LOL
 

Worcester

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Mentor
Arms
- What did the supplier / manufacturer of the mounting system say. If german, there will be available a full installation instruction manual which goes right down to torque setting for the connecting bolts as they need this for the TUV certificate. Contact the supplier and don;t accept less (we nearly always deal direct with the manifacturers in geremany so have experience of all the manulas turning up with the materials :) )
 

Worcester

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Mentor
Arms
Is it Sigma I or Sigma II ?
Whichever, it should also come with / you will need a ramming shoe - a special cap that goes on the end of the ramming posts (use to use those when I did sheet piling walls... Roots don't stand a chance when you get a pile driver on it :) )
 
S

SpitfireW'sale

  • Thread Starter Thread Starter
  • #9
Some sound advice above...

We can supply an alternative "ballasted" ground mount system that uses aluminium framing, but does not require any excavation / ram posts, so saves installation time and cost. Will be happy to email you some details if of interest, or have a look on our web site. Thanks
 
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