Brushless

I have 4 x 10.4Ah (41.6Ah) 6S LiPo batteries from a obsolete drone project. Min/Max voltages are 21V/25.2V and the charger should normally be CC/CV. Problem is most solar chargers are meant for Pb batts and thus have different termination voltages. However, it would be great to use these for a small solar system rather than just have them sitting around getting old. I haven't seen any SCC's in SA for lithium batts, but there are a few places across the ponds that offer solar chargers with a lithium option. The DoD for lithium's is 80% so better than most Pb based batts. Anyone using lithium batts here?

That makes sense. So my panels' open circuit voltage is 45.2V (22.6V x 2) and max power voltage is 36V with a max battery voltage of 28.8V (14.4V x 2). So would a MPPT SCC give me extra 30% current here?

Yes, not as good as MPPT but better than PWM. I have an old 10A PWM Phocos SCC that I must try and see the difference. That reminds me about another question regarding PWM vs MPPT. In good sun and warm temperatures it seems a MPPT SCC might not have the benefit that it would in cold climates and weak/obscured sun. What would the realistic % improvement be in our climate? 10-20%?

Actually correction there, it's MPPC not MPPT. It's a HCDP 360W controller which I've adapted.

My SCC is MPPT not PWM.

OK, I got the Mecer 1440W Inverter/UPS having read up on it more here: https://mybroadband.co.za/vb/showthread.php/698166-Opinions-on-Mecer-Inverter , and generally the opinions on it were quite favourable. It works great, just a little noisy as noted in that thread, it has what seems to be a standard PC fan so has just about the same noise footprint as a standard desktop PC, not too intrusive at all. I'm only drawing 210W max with everything running so it's not stressed at all. My two 150W panels in series are currently producing 8A at 26V so ~208W in full winter JHB midday sun. So I think I'll probably be getting another two 150W panels for a bit extra charging capacity.

Thanks for all the replies. The system will run probably 8-10 hours a day mostly at fairly low wattage (300-500W) so based on what has been said that inverter will probably do the job just fine. And R1500 compared to R4850 for the RCT is a substantial price difference. I wondered if there are any other inverters around that price better than the Mecer?

I am keen to build up a small, economical solar system for my PC/TV/LED lights in a detached office. I have a 150W panel and plan to get another one to have 150W @24V, I also have two 105Ah deep cycle batts in series and a 24V solar charger. Saw this inverter which seems a good buy, 2400VA/1440W for R1508: http://www.geewiz.co.za/mecer-invert...ontroller.html Any other good buy's around? Or any other suggestions?