Planning a rooftop solar setup
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The celletronic ones appears to be clones of voltronics, not genuine voltronics. Their Galaxy 6g is deya china rebadged it costs $1600 in aliexpress. The other model they have is listed at 85k or so but its not MNRE approved and it costs $580 basically we are paying nearly double the price.
There are lot of suppliers for battery in bangalore itself. As said earlier in bangalore you can get a 12v 100ah equivalent for 18k+GST, price is just for cells without BMS and wrapping or casing.
Panels which are bifacial, the other side only works if there is sufficient reflection from roof, in reality the amount of light you can get from the other side is very less, they also do not have a aluminium bezel and it requires special mounts, since they are not standard sizes in bi facial, the extra price overall is not worth it. More over because they lack the aluminium bezel, heavy winds can cause stress in the glass.
About inverter warranty we don't even know the distributor will be in business in 5 years time. Unlike panels which are made in India and not dependent on china. Inverters warranty is entirely based on india china relations and the distributor vs the chinese company relation. Most of the time inverter manufacturers will find every excuse to deny warranty.
I heard in solar expo from one guy who stopped dealing with growatt due to poor support, whether its BS or reality is a different question.
On grid inverters made by indian companies do exist like luminous
Look for inverters that are non chinese, if you want warranty. My flin fusion is made in china but designed in Taiwan.
Those inverters needs another MPPT charge controller to charge batteries, otherwise they consume around 50w to 100w/hr just to keep the batteries fully charged. Also regarding the VA rating, 5000va inverter could in reality be just 3500w to 4000w, not necessarily 5000w.
They are just regular inverter with a PWM controller and of low capacity nor can they use solar and utility simultaneously, this inverter works entirely by battery, the solar charger only keeps charging the battery and the inverter section runs off it. It cannot power loads directly via solar or without batteries.
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Are you sure about this, because Vikram and Waaree both seem to have framed half cut ones which are approximately the same size as 72 cell panels.
Enphase and SolarEdge are large US companies with worldwide presence, so they would be around I guess. Agree on the Chinese companies though.
Could you please share names of some which you found reasonable / interesting / have contacted in the past ?
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Unless they are transparent, how will sunlight pass through them for reflection, the half cell ones come with frame and the amount of light it can pass through the gaps in questionable.
It works well in open land, when in sunrise or sunset, when you have adequate spacing. Or in Snow filled ares where the white snow reflects.
Search for solmitra, there was another company as well cannot recall, will see if I can find the visting card. But basically Solmitra was the one who gave a quote of roughly 18k+gst for 12.8v 100ah lifpo4 battery excludes the price of BMS, wrapping or case.
We anyway have to get a structure fabricated to install solar at our place due to tall trees around. Thinking of getting something like this. Hope it won't be too expensive. That'll allow some gardening activity on the roof as well.
Those are Z channels not used in home size installs, its mostly used in warehouses/factory size construction.
If you have trees you need to keep a note on the shadows created by trees and neighboring buildings, I studied the shadow for the entire 12 months to get a idea about how many panels, I can put and where to put them. In summer I could put little over 15kw of panels but in December I can utilize only 7kw of panels, rest of them will be in shadow due to a iron sheet structure in the building next to mine. This year the structure was removed by the vacating tenants of that building, so now I am tracking the shadow every 10 days.
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Thanks. I need to do even more reading I suppose.
Few questions I had regarding batteries -
1) It appears 24 & 48v lithium batteries are exponentially more costly than 12v ones, for the same Ah. Any specific reason for this ?
2) Can I chain 4 12v lithium batteries and connect them to my inverter / ups, similar to lead acid batteries or is it different for lithium ?
3) Do you know any hybrid inverters available in India that work with lithium batteries ? Does FlinFusion support it ?
1) The only reason if it may is due to larger BMS, bigger case, more wiring internally. But when in terms of off the shelf bill of material for DIY method, i expect the price to increase by max of 3 to 4k.
2) Yes you can provided each of the pack has its BMS. Infact a 12v lithium battery has 4 cells wired in series ifs its a lifep04 pack and about 3 cells in series if its a li-on version.
3) Any flin energy inverter will work with lithium, the difference being is that a dedicated inverter with lithium settings will communicate with the battery via CAN port and will stop charging when the battery reaches 100%. If it doesn't have a CAN port or any other communication method the inverter will rely on voltage of the pack, once it reaches the user set voltage, it will ramp down the amps, In the case of flin fusion it can go as lower then 0.49A (possibly even less but my meter cannot measure below 0.5amps) in this case the passive BMS or active BMS of the battery will just convert the .5A which is = to 24watt of energy for a 48v pack into heat via a resistor bank of the BMS and people have been doing this for ages, 24watts (again flin could be even lower) for a 5000w solar array is minuscule.
they are dual mppt in 5kva mode and their mppt model is hybrid.
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Only the PRIMO series can do that, based on their diagram how it shares load with utlity is basically charge the batteries with available solar power and remaining with AC power. The inverter inside works because its just converting DC to AC, so this inverter is basically a double conversion inverter, like the Flin Ultimate.
But the difference compared to a Flin Fusion is that that the Fusion doesn't need batteries to do this, it can combine both solar and AC to directly power the load without the battery, where in the PRIMO series basically charges the battery in solar and AC and the inverter just runs of the battery voltage, depending on how well the algorithm/design is the battery could be kept at 100% charge or if its a bad design it could cycle the battery by few percentage. You will have to ask the manufacturer to know about this.
The other disadvantage of the vipra primo series is that 5kva is only 4000w inverter vs flin which is 5kva=5000w. Also the vipra like other indian brands use more number of batteries you will need 8 batteries for a 5kva model vs 4 batteries for the flin.
Also not sure what are the settings you get to adjust, in the Flin you can adjust the charge and float voltage, in the primo catalog it mentions boost voltage adjust meaning there is no float voltage setting, this can be a issue for certain lead acid batteries and you cannot use lithium batteries.
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Do note I am yet to buy the solar panels, you can read below, that whole thread has lots of info on batteries and why I went with fusion
Looking for a home UPS that is smart
Is the stair case area within the house living room area, the fan is noisy 57db at 1 meter in my stairs, 46db above the stairs into the first floor door. If the door next to the inverter is close, messured from outside the house main door, it is 46db. Ambient noise at 12am plus is 42db. It...
techenclave.com
jagdishsingh
Beginner
Dont forget to update the total cost and the name of brand etc that you buy after setting it up. Looking forward for that.
Yes, they are available, check if its approved by your DISCOM.
The cost depends on if you use optimizers. The advantage of panel level control of Enphase cannot be achieved by the inverter alone in SolarEdge.
Party Monger
Juggernaut
Well, I noticed following when I last checked,
- 500-550w modules available now, both domestic and imports.
- BiFacial panels are more easily available, but they require a reflective surface (white paint etc) on the roof to have any meaningful effect.
- Cost of all solar components has gone up by 30-40% as GOI has imposed tariffs in the name of MakeInIndia.
- Cost of components will go up another round from April 2022 as more tariffs are expected to kick in.
- GST on solar components is up from 5% to 12% since Oct 2021.
- Enphase IQ8 micro-inverters are available, but their use in hybrid setup depends on approval from your local ESCOM.
Party Monger
Juggernaut
Any idea how much those 500-550w ones cost? I'd like bifacial cause I have white tiles and can paint other parts.
I saw the tariff went from 5 to 12%. This govt itself is the country's biggest enemy. Random policies with zero sense. Any idea of Indian manufacturing? Are they expected to be cheaper? The best ones, since I have limited space.
Are these single inverter per module worth it? Since they cost 8-10k? I mean that's almost 50% cost of the panel. Old ones don't seem to have got cheaper.
Any idea about Lithium iron batteries? And a setup that uses solar power first and only uses grid to suppliment or return the surplus?
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