Natal_Nic

Hi anyone have any negatives about these batteries? Application is purely backup load shedding and wont be used with panels for now. TIA

ONCO

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Q1 - Noted thanks Q2 - So leave 2 in series and connect the other 2 up in parallel? Q3 - Trying to wrap my head around on how is it possible to have a back up system with a huge amount of AH. EG: say for a 48v system you have to have x4 12v batteries. Assume each of these batteries is 100ah. If you connect these in series as you previously explained earlier you still only have 100ah. What happens to all the other AH's if that make sense? How does one get a 48v system or 24v system with 400ah or 200ah respectively? Does this only happen when connected in parallel? I assumed if youve got x2 105ah batteries you will have 210ah to work with. Hope this makes sense. haha Q4 - Noted thank you

Wow thanks for letting me know gents. I had no idea. This is why this forum rocks Please can you assist further. --------------------------------------------------------------------------------------------------------------------- Question 1 If I want to keep within a max DoD at 30% to save batteries. Should I only be utilising 378w's every hour 24*105ah = 2520w (This is the total watts available from batteries?) 2520*30% = 756w 756w / 2 hours of load shedding = 378watts I can use per hour? --------------------------------------------------------------------------------------------------------------------- Question 2 How do I add more batteries to the 24v system to get more AH or Watts out of it. Parallel or series? or is this not possible? --------------------------------------------------------------------------------------------------------------------- Question 3 If I had a 5kva inverter and had say for example TEN 105ah batteries would there still only be 5040watts available? Is there a link for further understanding on connecting batteries up? --------------------------------------------------------------------------------------------------------------------- Question 4 During last nights load shedding I went through the menu on the inverter and discovered that load in watts was around 350w. Is this measured per hour so its an average of what the load will draw within that hour? Thanks once again. NN

@P1000 is it not 24*210ah = 5040wh?

Thanks Coulomb

Good Day, Went out and picked up a Axpert KS 2KVA inverter, x2 105ah lead acid deep cycle batteries, summoned my electrician mate and voila. Load shedding a thing of the past. The unit is not connected to any PV panels. During load shedding the inverter is operating between 50 - 75% After the 2 hours of load shedding is up and mains kick in the inverter is now charging the batteries. Some questions: 1) Every now and then upon charging and after I hear 2 very quick beeps. As well as a single beep. These are few and far between. What are these beeps about? 2) Do I need to adjust any settings to optimise battery performance and longevity or will the factory ones suffice for this super simple setup? Thanks in advance. NN

Thanks for the feedback. Let me try explain further. The figures used in my first post were purely used as an example. I own 2 swimming academys. Pool one has x2 heat pumps with a combined KW rating of 26kw. I understand this is not KWH. Pool two has x1 9.5kw unit. Im looking for an option where I can install (Start the solar journey) grid tied inverters with modular capabilities. So basically start small then grow when wallet replenishes. To have a hybrid system with batteries is financially not possible now or in the near future. I see I should try get hold of peak usage figures as, understandably, this is quite important. Would a smart meter such a a Carlo Gavazzi work? Or any recommendations? Both sites have very high solar yields through out the year. Thanks in advance

Example: Inverter rating 3kw. Daily household usage 10kw. Is there any cause for concern installing a undersized inverter that can be hooked up in parallel to another 3kw later down the line and so on. Regardless of what the required consumption is will a grid tied inverter supply rated output (taking into account sunlight exposure etc) not the line? Thanks in advance NN

Hi Guys looking to get setup with a inverter that can accommodate solar and mains charging. Im a complete noob in this. I rent a free standing house so solar panels not a absolute must right now. Mate is an electrician who will separate Dbs etc Just want to get started. Here is the link: https://www.communica.co.za/products/vp-mks-3k-mcr Thanks in advance. Nic

Thanks for the response guys. Im not to sure on what they using at the moment but Elec bill alone is in the region of 8-12 k (summer-winter) @Jaco de Jongh any suggestions on steps forward?

Good Day, As the subject states would this be achievable with a grid tied setup? The heat pumps are 9kw & 17kw units. We have enough roof area to fit pannels. I understand that at night we will be using the grid to power them but if we can try save during daylight hours that would help. Based in Durban. Any suggestions?

Ahoy, Is it possible to hook up a solar setup for the sole purpose of charging batteries to an existing 1000w inverter/charger unit with 2 105amh batteries? Without something exploding or bursting into flames. OR Is it better to go with a hybrid system that can accommodate both? Like this:http://www.communica.co.za/catalog/Details/P1984452319 Oh yes im new here aswell Thanks