Vik

Ok so I found a 575w bifacial panel from ja solar - the only issue is it's n type cell - would that be an issue I am attaching the specs of both panels - I have circled the respective panel specs from JA Solar website. I hope that provides enough info Thanks

Hi everyone I have a 8kw system (sunsynk) with 15kw (3 batteries of 5kw) battery backup (bsl). I got 12 panels installed 545w bifacial on my roof (JA Solar). Now I am thinking of adding 4 extra panels to the system - firstly can i add them without breaking any VOC or current limits Secondly can I add 4 higher wattage panels (bifacial but 600w odd of same company JA Solar) to the exiting panels - will it cause issues with inverter or generation or any conflicts any opinions, advice, recommendations much appreciated Thanks

Many thanks Teltech - really appreciate the detailed response

Sorry Bobster I don't know how to respond to each part like you 😀 I get your point on how gimmick marketing has been used by the companies to push products. But when it is advertised and you know then I think it's a decision thing for me. as for your spec of battery being higher spec than inverter I think it is the case with this Dyness battery as well - top charge rate is 200amps while 8kw SS can only do 190amps top so that gives me some inbuilt failsafe as you have mentioned Thanks for the calc on 12hr use of koi pond and drop in used units - I reckon then potentially I could be grid free for certain hot days actually if my consumption drops to 32-35 - I think it's totally worth it then - many thanks

Hahahah thanks for the response Greenfield - I didn't mean to discourage any response - may bad the whole shpeel that some people sell around panels being double sided glassed is better and more durable even when you put it on a tiled roof i wanted to confirm the durability part as it does seem like there is no use of bifacial on a normal tiled roof

hi Bobster thanks for the reply to your point on that koi pond pump - point taken that it needs to be on a timer and can't chow half my batteries at night (I mean I wouldn't want it to) - so those koi have been without electricity for a day many a times so I believe they can stay without filteration for 12 hours and use the pump via solar during the day (little bit of grid spillover maybe but nothing that breaks the bank in terms of units consumed). to your point of 1C battery (and thanks for the lookout of ads) - what is the downside of a 0.5c battery here in this configuration- 14.3kwh can be drained at 10kwh (probably only for a brief while I guess) and even if it is 0.5c you get discharge at 7kw for 2 hours - my inverter is 8kw and with some efficiency loss here and there might be able to handle only 7.5kw - so to me I like the bigger backup with not too bad of a bottleneck Nicholas - totally get your point on redundancy- one goes off and other one can still work - 15kw in 5kw batteries is around 60k and for 70k one can get two 14.3kw batteries - that's like 28kw backup - I mean even if i were to think of redundancy I would add 14.3 and have backup for days - almost like be off grid (very hypothetical indeed) - but get your point absolutely - many thanks for pointing it out I see no one has a view on mono bs bifacial panels

Many thanks for the reply Carl So the system was thought to reduce the dependency on COJ - I.e I use around 40units of electricity a day and if I can generate say around 25-30 of those with a system then my electricity bill should go down (in addition move to prepaid as well so as to lower running expenditure). The payback I calculated was around 5 to 5.5 years if I am able to halve my electricity bill (esp as costs have come down) Also the idea was to change behavior and use sun energy when available- use dishwasher, washing machine, pool pumps during the day - if there is any excess I could use it to run my Aircons or put it towards my geysers. My geysers are retrofitted to solar tubes already and on timer so don't need to run geysers as an essential load as such. Also there is a gas burner so don't need electricity for stove. There is a koi pond in my house which requires a 24hes pump but I thought with solar and battery it shld be ok (700w odd). I would use batteries at night when sun goes away so as to supplement the stored energy for grid and reduce my electricity bill i doubt if I use judiciously (change behavior to use more solar energy when a available) I would use more than 14.3kw (that's almost closer to 3 5kw batteries). I get your point on additional battery but I doubt I would need it (touch wood and never say never😂) Also would love your view on monofacial vs bifacial panels

Hi I was thinking of getting an 8kw Sunsynk inverter with 2x 5.32kwh Sunsynk batteries and 12 panels JA solar bifacial (545w) until I came across another battery choice- Dyness 14.3kwh power brick. Some of the things I found attractive were 1) This battery has higher storage than 2 batteries - yes I understand 0.5c charge and discharge but if inverter is 8kw and you are discharging at say 7.1kw - I don't think you are losing out much. not to mention it can discharge at 10kw if need be as per website 2) this battery is cheaper than 2 sunsynk batteries and comes with unlimited cycles 10y warranty why would someone not go for this and go for less storage with sunsynk batteries - only reason could think of was more warranty on inverter as you use sunsynk batteries Another thing I wanted to clarify was monofacial vs bifacial panels - given a choice would it better to have bifacial even though they would be on the roof as they have glass coverage on both sides Just looking for opinions from the Solar people who are pro at this