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The SMA series of inverters are excellent, quality, German built equipment. They will work perfectly with the complimentary SMA Sunny Island inverter/charger to power your batteries. If you can afford it, have a look out for a secondhand Sunny Island & that's all you'll need. Unfortunately...

Hi Mark, Yes, the standards are the same/common for both our countries. The standards are what all electricians are trained on from the start and are the bible referred to every day, if required, to ensure any electrical installation complies with the rules. There would be similar standards...

Thank you for that Wim - I missed the discussion - certainly a diversity of opinion! Anyway, I'm very happy with my big battery (no longer 3 seperate batteries) it's working very well & monitoring/balancing is excellent. Cheers, Dave

OK OK , I can't let this one go ....... We seem to have two complete divergent opinions here : On the one hand we have Korishan stating : "That's the way most have their strings connected. They have several individual strings connected in parallel at the absolut Pos/Neg ends. Each strings'...

Thanks, Wim - that's true of course but I guess the point I was trying to make was that the Batrium system does not re-distribute current from higher cells to lower ones. All it can do is burn off excess from the higher ones to be "wasted" as heat. It seems that I must have missed the...

Hi Jon, I purchased the Batrium system mainly for its monitoring ability - with balancing as a secondary consideration. I consider their monitoring to be second to none - their telemetry gives real time stats on every cell including all bypass details (times currents etc). The Daily History...

Excellent - thank you Wim ! I am doing exactly as the RHS diagram shows - except a 24v sytem with 7 instead of the 14 shown here. The whole point of my approach is to allow each group of 3 parallel 160p cells to share the discharge load. If there are some differences in the individual cells...

Hi, A diagram is the best way to describe this issue - I've pinched this one from a previous post in the FAQ section...... [/URL] Imagine this is my 24v system - 7 series batteries instead of the 4 shown here. Each individual battery has 160 parallel cells within it. The batteries are...

Hi, Just because that's the way most have their parallel banks wired up doesn't mean that my approach to this is wrong. I have checked out the changes over several cycles of run-down battery levels in the overcast (minimal charging) conditions. It is very obvious that the linking of the 3...

I have a 24v system made up of 7s160p cells - I have been gradually expanding capacity so that I now have 3 parallel banks or around 30kwh. These have all been working happily whilst we have plenty of sun and are charging up every day. Lately our normally sunny Adelaide weather has turned...

Complying with AS5033 is in the interests of everyone. It is in particular for grid connected installations that have the potential to send lethal voltages back into the electricity network. The standard specifically states that - "PV generators of less than 240W and less than 8A and less...

Thanks for the kind words, chaps - appreciated. Re: the capacity - I started off with just 7 batteries - nearly 10kwh - and was so impressed after the crappy SLA's that I had to make up another set of 7 to get up to the 20kw ! These supplied most of our house load so we now use very little from...

I've just added my third bank to my project and better document it for the cell counter list! My system started over 12 months ago with the intent to replace my inefficient SLA battery bank. The build was based on the You Tube videos by UK DIY Powerwall - one of the first to start this idea...

Hi dag, thanks for the additional background info. I think that the problem for me is that I can't see how your 'invention' can have a practical applicatiion in my area of interest. it seems that you have a brilliant method to increase the efficiency of electric motors, but for me, I'm too...

Hi Dag, I responded to you a couple of days ago but my post was deleted because it contained external references (your original post) Anyway .... I think your invention looks extremely interesting with potential application in our diy battery field. I am having trouble understanding it all -...