DDD

For 2 200 batteries. I never saw these batteries and was not prepared to take the risk. But then I bought a lot of other stuff routers, switches one router R58 000 so I recon it was goodwill. Never realized what they actually cost until today.

Let me be more precise. Sorry. "Ek weet mos waarna ek verwys" . I could not understand why I must take solar panels connect them i series to get 105V. Depending on skin resistance 100 and above can kill. For the first time I understood why OSHA inspected my panels .... I never realized people are jacking it up to 105V. When people told me I need an MPPT I googled and then saw this: https://www.google.com/search?client=firefox-b&ei=vQmrW9CmDMT8gAa55bD4BA&q=MPPT+150%2F70&oq=MPPT+150%2F70&gs_l=psy-ab.3..0l2j0i22i30k1l6j0i22i10i30k1j0i22i30k1.29104184.29104184.0.29106923.1.1.0.0.0.0.247.247.2-1.1.0....0...1..64.psy-ab..0.1.246....0.aXciHXxfHtE . Jup R7xxx for a devise to do what? So I then used an old project software and designed a bulk charger that monitors the charging of batteries. Therefore a few parameters: I look at charge rate. This tells me if there are "false" charging. I measure the current into each bank batteries I measure the current out of each bank batteries I monitor the current from solar panels. In total I have +/- 120 different parameters that I monitor From this I can can calculate all what is necessary to determine the status of my solar panels, batteries. For me it is not about bragging rights but if I give service to people I realize that not all understand these things but graphs tel us so much about our systems. That is what is important to increase battery life. For me I know I am crazy when I refer to an anchor but to understand a clients problems the graphs tell me more about a system and the design that the developer wants me to know. I been designing a few systems and it is important to get these values. Therefore I actually put the controller at the panels, I never have to worry about getting killed and it is seen as an extra low voltage system. There are so many advantages. I also put the solar tracker in the software. A small example I was missing current and the ratios showed me an error. Looked for it and saw the red bolt. Things like that is what the little box do.

Nope it is not an anchor. I took a different approach. My device is to monitor the batteries. I can switch off any combination of panels and also the output from the batt to the inverter. Thus the system keeps on doing maintenance for me. What you guys are referring to ABC def I simply want to monitor and control the way I use my batteries. Thus my device I can measure many parameters and graph it. It gives me heads up on battery issues solar panels and mismatch in my system. For that I think you guys have 3 or 4 ABC. ....

when installed but if you take a photo of the sticker at the back it is 36V 8 amps .... If you connect them 2 in series for 265 what the max you get is +/- 65V But the sticker will say it. Therefore I guess you have 3 in series and 3 of 3 banks that is where you get 105V. Nope I will never do that. It is the serialization of the panels that increases the voltage.

You are right it is standby batteries but deep cycle. I am getting the full curves etc from the manufacturers. I have the same but mine is 200 amp hour. Victron MPPT & VICTRON I only saw photos and prices and when I return from intensive care after shock treatment I realize this equipment this equipment I can not afford. I Paid R4500 for my 4 batteries and was money well spend. How ever to use it for standby it must be fully charge. Less than 54.6V will never ever recharge the batteries and then for at least 8 hours from empty. I think I am walking on thin ice and I do not want abuse Paul007 "gasvryheid" for allowing me to ask questions and have a look at his system. Please you can ask me a lot about batteries and charging and.... But I do not want to abuse Paul by referring to his system. I will say thinkgs jokingly that I love doing. What I can say I did a proper research on the charging of "lead based" batteries and designed a charger that was approved by the "designers" of the batteries as being labeled as accurate and good. Therefore I know a little not much about batteries but for me I can never ever use Kw to charge a battery. In a few words an MPPT is to accommodate the mismatch between solar panels, inverters and batteries. In other words to try and get max performance for the difference between a PV and battery. A MPPT is to correct an error in design and make life easier. Not a need or a must. My opinion a total waste of money. But that is my opinion. I spend some time on batteries and a battery simply put has a few basic parameters: ( I can put a lot more down but for this I keep it simple) Voltage Max V operational V and Min V Charge rate Discharge rate Operational temp +/- 25 is a good temp Charging temp. Never ever one speaks about KW when charging a battery or only to calculate the cost of charging batteries.

I should have asked what is the input voltage range of this type of inverter. Not related to what he has. Sorry for that. I was more interested in that than in his set up.

Maths is totaly incorrect. Unless there is some magic then we can sell it to Ferrari for F1 and retire.

Jaco what is the input voltage range of the inverter 40 - 90VDC? 340 in total? 2 banks = 2 * 42 = 84amps ?

I know but in his configuration his banks must not exceed 85 amps. I will shorten the battery life. Not charging it in full has an impact on battery life as well. He can only only get 32 amps. If he adds another panel then 40 amps.

Sorry 40 amps is max charging typo error.

Confirmed with manufacturer. 14.1V to charge as per graph. These batteries if 200 amps can handle 30 amps charging current after that you start cooking them. From your solar pannels I do not hope you bought a MPPT as that is 100% not needed in your configuration. If so lets go fishing.

56.4 charging at 20 amps it will take 10 hours to fully charge.

For me if you have 2 banks of 4 then 56.4V

Your "test system" the inverter set to follow the of grid unit is it high or low Freq?

Can I please have a look at your Voltage and current amps

Will get photos and current range available

tnx. Nothing will happen. I can control the current from 250mA up wards. The invertor I am refering to is an of grid with a nice FAT transformer.

Many thanks I thought you are grid tied. I only have 6 x 235w and 2 x 250W. 2in series 4 in parallel.

tnx Should grid tie not follow the 220V of the grid? I will see in the next day or three. Customs must release my stuff then I can see. Tnx

yes. I did not buy them in SA friend I know got them abroad for me

Hi to all, Is there any person who perhaps have 10 or more 300 - 350W solar panels that uploads the data to pvoutput.org and would not mind me having a look at the graphs. Regards

More a question. If you use a pure sine wave 600W inverter as the "base" generator. A relay activates this standby unit then the grid tie inverter should work 100% or am I wrong?

There are some very nice 150 / 120 that one can reset. I bought a few it is smaller and cheaper than a fuse.

Jup it is for the 220V side. It is seen as a generator therefore should Eskom loose more than 1 station the grid freq etc will vary. To stop a "massive blackout" Load shedding starts at 49.X Hz. The freq can drop to 47.5 Hz before there is a blackout. Therefore the generators should trip when grid freq get to 47 Hz then we have a black out. Once tripped it should monitor the grid and do a auto synch and auto reconnect. Like a coal/nuclear power station. If the grid gets above 260V then there are plenty pieces of equipment that is gone.

Nope 16 x 60 amp 200V mosfets and control logic. It is part of my cct that charges and test the PV's when harvesting solar power. Still confused how I slipped up with that. I can switch any amount of strings off and measure the current per string or combination. That is how I missed the 2 amps. 3 strings are 8.1(235W) amps and 1 string is 8.6 amps (250W) MaxV 61V. The stickers are lower than the actual performance of the panels. I normally harvest 34 - 36 amps which is more than 100% the ratings of the solar panels. I get between 103 - 108% the rated output of the panels for max solar time of day. Gets very close to short cct values. But it was a major blunder on my side.