This is an enquiry from a construction company in Al Ain, UAE who requires a solar PV powered port-a-cabin. I have also attached our system sizing report, Trina solar panel ( 400 Wp) , Midea 1 ton AC and battery datasheet for your kind consideration.
This port-a-cabin is going to be operated at a construction site.The load chart is finalized as per the client’s requirement. All the mentioned load will be working from 6 am to 6 pm continuously 24x7 for 6 days / week. Night time consumption i.e. from 6 pm – 6 am is 0 excluding modem.
Client is worried about the two 1 Ton air conditioners working together with the other loads as mentioned in our case study report at a temperature of 45 to 55 degree Celsius. They are looking for some similar project reference or technical assurance from the inverter manufacturers that their inverter and other related components will be sufficient enough to operate these loads at the afore mentioned temperature conditions.
As per our calculation , battery requirement is in the range of 24 – 28 pcs of 12 V,200 Ah LEAD ACID. In this situation BMS is mandatory to make sure that all the batteries are charging and discharging equally .
We have tried our level best to convince our client by saying that even though your system is working during day time , battery bank should be optimized. Client is having a thought that they can reduce the no.of battery to 12 or 16 pcs. They don’t have a generator or grid as back up.
What is your opinion in this case ?
Please cross check and verify whether our study is correct or not , if not then please suggest us a better solution from your side so as to make it more economical and practical.