Recent content by Ronski

Pre zero vat rate, the installer may have charged 10% mark up on materials, then added VAT, now it's probably 30% mark up, and no VAT. Basically you can't be charged VAT but the installer decides how much mark up they put on the parts, labour rates could also be increased by 20%

Sorry for the late reply, it's as per the above post, or can be done in the inverter setup. If you wanted to change the current on the fly, I would think it can be done from Node Red. I've been using the full 140 Amps over winter, which is only 0.25c for my batteries, so no need to reduce...

Batteries have been dropping in price quite a bit lately, even the grade A 280Ah cells are only £130 each now from Fogstar, that's £50 cheaper than a year go. Grade B are just £100 retail.

Is there likely to be a market for the kit, looks pretty specialised to me? I've still got stuff I bought because I thought I could buy it, use what I needed and sell the surplus.

If you're looking in to different BMS's then JK have just released a new one. https://off-grid-garage.com/battery-management-systems-bms/

Andy's main issues was around the way the BMS reset the SOC to 100%, and also how the system would restrict generation once the battery was full, so the batteries would supply power rather the solar ramping up to meet denand when there was plenty of solar available, then the batteries would...

@Mcskippster if you want a high quality setup, then it has to be Victron with your choice of batteries. It makes for an Incredibly flexible system, but it's expensive. For voltages have a look at Andy's off grid garage recommendations.

I use an ET112 energy meter to monitor my SolarEdge production, grid usage uses the Quattro's built in energy meter (grid flows through the Quattro), which is out by about 5%, I may one day get another ET112 to use for grid monitoring. I'm very pleased with my system.

What's the bit in bold mean?

I'm pretty sure you shouldn't be using the PV Inverter assistant, you've mentioned you're using ESS, which is mainly for grid tied systems, the PV Inverter assistant is for off grid, and its purpose is to alter the frequency of the AC output to limit or shut down an AC connected PV inverter. The...

The thing that confuses me is if I set the solar to 0% (its a really bad day!), don't force eport and only import off peak, it says I have a loss of £2.57 But thats not the daily cost, the daily cost is £4.73. Now I'm guessing that because I end the day on 44% SOC it see's some of it not...

In that case just, click the link again, its some sort of weird bug, clicking the link again normally opens the shared site.

DC coupled batteries are more efficient, therefore less loses. In a DC system such as the Victron system, current flows from the panels through the MPPT to the batteries, apart from the MPPT dropping the voltage down there is no conversion, so it is more efficient. The batteries are normally...

@Bob Smith Yes they can be noisy, but mines in my detached garage, and yes it does add very quickly cost wise, and having an installer install it will be even more expensive. I did all the DC stuff, and I had an electrician do the AC side.

Take a look at my build thread to see whats possible, and I'm sure I'm only scratching the surface. https://forums.overclockers.co.uk/threads/ronskis-solar-battery-diy-build-with-whole-house-backup.18957434/ A word of warning Victron gets very expensive, very quickly, but during in testing I...