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Yubbz

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  1. Hey all, I may have put the cart before the horse here but I have a camping trailer and I am looking for about 100ah of useable capacity. Chargers: The two chargers that I have are the Victron IP67 25A Charger (for when AC is available) and a WRND for solar and for charging from the vehichle while driving. Here are the specs: https://www.victronenergy.com/upload/documents/Datasheet-Blue-Smart-IP67-Charger-230VAC-EN.pdf https://wrnd.co.za/PDFs/WRND WDB1220LSM charger - Manual_2v5.1.pdf The victron can do 10 or 25 amps and ranges as per the PDF (let me know if I should type them here) The WRND "boost charges to 14.4V for up to 2 hours and then float charges the battery at 13.7V. If the battery voltage drops below 13.5V the unit will revert to boost charging" and does up to 20 amps Battery choices: Basically there are 3 choices: 200ah Lead Acid @ R 4,899 with 1350 cycles at 50% DOD https://solaradvice.co.za/wp-content/uploads/2019/09/cnbm_100-200ah_gel.pdf (100ah and then 200ah in the same document) 200ah Mecer Lithium ion phosphate 200ah Vision Lithium ion phosphate So I feel that this is an unknown for me and the lead acid will save me some money now (for solar panels) and I am also not sure how I feel about a lithium battery charging under my bed at night.... That aside, I feel the lead acid will "just work" with the chargers I have, my question is, will either of the Lithiums? Thier prices are less than double that of the lead acid and I would be saving weight. Also, I cannot find 100ah lithiums and the 200ah lithiums seem well prices enough. Let me know what you guys and gals think Thanks in advance. Best, Kyle P.S. I cant share pricing, sorry
  2. No idea about the CTek drawing... I would not want to put a Ctek on with a load (my opinion) as the ctek is designed to monitor voltage which will fluctuate with a load and if it is back on eskom (the ups charger), the two chargers will conflict... (my opinion). The ctek and the ups charger will lift the voltage and the other charger will get confused. most 12v "ups's" have 1a chargers, I had a quick look and google did not help me... Regarding your load, Most cameras are rated to 1A (at least my hikvision's are), so assuming 20ah per loadshedding on a 100ah battery you should manage 3 rounds per day if you can get a couple hours of charge in before the last round.... The difference between this and a UPS is that in your case there will be too many cooks in the charging room... I am not sure about budget, but why not look at something like a growatt 3kv with 24v input? you could make your own trolley? (I've just ordered a 5kw so no idea how well they work yet)
  3. Have you considered the charger limitations? I.E. you use 40amp-hours during loadshedding over 2 hours, a 1a charger will take 40 hours to charge it (ignoring losses) This is a problem when you have loadshedding more than once a day. We went this way but found the batteries will not charge fast enough, so moved to the mecer units with 10/20a chargers (modified sine wave tho) If you do go this route, my recommendations would be to find a ups that has a fan while charging, not all do and they would appreciate the fan for the longer charging cycles...
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