Battle Born 100 Amp Hour, 12 Volt Lithium Batteries
Availability: in stock
Lithium is way cheaper and way better! Since that is quite a statement, let me tell you why.
1) They last WAY longer, typically 5-20 times as long. That means 1/5 to 1/20 the cost in the long run on that criteria alone. Lead Acid has tons of problems.
2) You can use a much smaller battery. Since you can discharge Lithium much lower (80%-100% VS. 50% for Lead Acid) , you can get about twice the power out for equivalent AH rating. Half the size means half the cost. 200AH of Lithium is a WAY better battery than 400AH of Lead Acid and we would even take it over 800AH of Lead Acid.
3) The energy retention is nearly double. When you put 100 Amp Hours into Lead Acid, you're lucky to get half that back out. Lithium is closer to 90%. You can look at this a few ways: Half the battery size again (half the cost again), OR double the recharge rate, OR double the effectiveness of your solar system.
Stacking up to traditional, lead acid technology.