Solar panels and lithium batteries

[prstlk]

We are thinking of installing 2 solar panels and replacing our deep cycle batteries with lithium batteries. Big cost but if it gets us where we don't run out of power with our current set up it might be worth it.

What we have right now is a Owen 5500 generator, inverter/charger and 4 deep cycle 6v batteries, which are 5 years old and we know they are close to needing replaced.

We are boondocking and run the generator until the panel shows full but we run out of power in the middle of the night. Both of us have to use CPAP machines so this is not a good thing. We make sure that everything else is shut off even unplugging the coffee pot and TV.

Has anyone switched to the lithium batteries? Will installing just the solar panels be enough with 4 new golf cart batteries?

Any feedback would be appreciated.

[TechWriter]

prstlk wrote:
Has anyone switched to the lithium batteries?

Not yet, but when I do, I’ll install at least two of these 206 Ah SOK batteries.

Remember, your charger will need to have adjustable Absorbtion and Float battery voltages.

prstlk wrote:
Will installing just the solar panels be enough with 4 new golf cart.

Probably not since you are draining fully charged batteries each night.

I’d replace your lead-acid with lithium batteries first.

[Lwiddis]

My solar system works well with my 200 amp hour Lithium battery but the panels, battery and controller are properly sized to my usual electrical use. Start with your average daily amp use then multiple it by 1.5. Size the three from that number. Done right, you’ll be able to camp without generator noise and maintenance.