the 20 footers are ideally designed for weekends or a few daze the grid...
water, juice, food storage/refer, holding tanks and so on all limit prolonged remote escapes...
so the electrical systems are designed with that time frame.
Originally Posted by thefatmike
...I hear stories of people lasting weeks alone dry camping and having power... How?...
the stories are just that.
OR these folks have BIG solar collectors and MANY holding tanks (batteries) and all the associated gizmos...
or they are using candles and wood and propane, not electricity.
Originally Posted by bryanl
...But don't expect too much from batteries. They just don't hold a lot of energy for the weight of batteries you can carry.
heed b's take home message.
IF the original batteries were poorly maintained (full discharges, no water, partial RE charges...)
get new ones.
i think your unit came with group 24s? these are just a tad less juice than grp 27s...
but fitting/space is the issue, so unless u wanna EXPAND the space/location for batteries REPLACE with same sized cells.
IF u want batteries that don't require ADDING WATER, get agms...
many threads on these here.
they will cost 2-3x but will survive abuse better and recharge quicker and MAYBE last more years...
the agms on my unit are 6 years old and still going strong, but that's not a guarantee in your application.
in order to have MORE electrical reserves one needs to...
1. install MORE batteries or LARGER/heavier batteries...
2. then properly tweak the charging system to FILL those larger, heavier, multiple juice tanks.
3. just like having more water means hauling LARGER/heavier containers for liquids.
expect 2-3 days of camping from 2 batteries and typical consumption.
use LESS or recharge with a generator and days OFF the grid will be extended.
so a tiny 1000 watt genset (honda or yamaha) is a light/simple way to reliably REcharge while boondocking.
ANY hope that solar will prolong dry camping is entirely dependent of a PROPERLY set up and SIZED system...
here's a reasonable thread for starting your solar exploration...