I have requested quotes from numerous installers and they all say different things with different prices??? I can't see the trees for the forest....
There are many ways to design a suitable system for your home, without talking about how other installers approach this, we firstly look at your home as an individual entity, it will operate differently to every other home, with different consumption at different times, have different challenges and as a result different solutions,
We look at your home holistically first to try and reduce your consumption using differing alternative energy strategies and then calculate how many panels your home would need to run on solar and charge the battery bank, and suggest a suitably sized inverter to manage this.
The materials that we propose have been tried and tested not only by us but by external Standards companies, they have proper guaranties and are proper components. This is where the price differential comes in,