Greetings customer! Based on your budget of R25,000 and need for two lithium solar batteries, I recommend the following options: The Dyness 8KWH Lithium-ion Battery is available for R43,010 each. This would be a great high capacity solution for your needs. Alternatively, two of the Dyness 4.8KWH Block - Lithium-ion Batteries at R21,999 each would also suit your budget. Both Dyness batteries have excellent reviews for quality and performance in solar applications. Please let me know if you would like me to prepare an invoice for these items. As an AI assistant still in development, I unfortunately do not have the ability to directly generate bank documents. I hope these suggestions are still helpful in your search!