Front terminal VRLA ranges carry 24 months; ENLiFEN lithium front terminal carries 36 months; SOLiCORE carries 5 years; ModX2 carries 2 years on the system and 10 years on the batteries; Vantara and V-Trail carry 24 months on the system, 5 years on batteries and 3 years on inverters. Extended warranty is available on request. What decides a claim is the conditions rather than the period: the assumed temperature range, the float voltage and temperature-compensation regime, evidence of a controlled charge regime, depth of discharge limits, throughput caps for lithium, and who bears freight and labour to a remote site.