Good day to you all! Iam designing a 12kw solar system for a client. We do not have 2 volt large batteries in stock here in Egypt, so it can take 3 to 4 month for them to arrive! since we are in a developing country, shipping and handling is terrible especially with these huge batteries. I solve this problem buy adding an extra battery (naturally with a high cost) since if one get damage the customer need to wait another 3-4 month , no one get paid :) so in the case of all 25 batteries arrive in one piece cant we change the parameters on the solar chargers and inverters to charge and discharge on different voltage using 25 batteries 2 volts? i think this could solve a big issue here and in many developing countries! Thank you for your time and wish u all the best!