Jaws
LIFE MEMBER
- Sep 26, 2008
- 23,971
- 77,493
- Funster No
- 4,189
- MH
- C class, Chieftain
- Exp
- since 2006 ( I think ! )
Having now had a chance to test the system semi seriously ( 5 days off grid , no engine starting ) I am happy ( for now 
) and can pass on the info to anyone interested.............
I have one 3kw ( 230 aH ) unit I got from from https://www.lithiumbatteryshop.uk/ over in Ipswich
The chap builds them in house.. Mine was £780 but I know they have gone up to £840
Why I chose him
He is local and invited me to go take a look at the build process
He was MUCH better priced than any where else
Each unit is custom built with grade A cells
When I did not understand a set up parameter he was a fone call away and helped me out
He has since built two other packs for me ( odd ball ones for odd ball apps ) and repaired a pack that came out of a golf cart thing by replacing a few crapped out cells and resetting the BMS
They come with a decent BMS that has blue tooth and an easy to use app
To support the system there are 4 x 125w solar panels ( If I was doing it today I would just use 2 x 250w panels ) utilising a Victron 100-40 MPPT controller ( also blue tooth )
I disabled the on board mains charger and bought a stand alone 20A lithium specific unit from fleabay for £35
I also added a Sterling 60A B2B unit which really does a good job at shoveling the amps back in between park ups if the weather is not solar panel friendly
Whist away in a field last week we used blown air heating at night, the telly for at least 7 hours ( poor Mo was stuck in the van a lot ) plus all the usual stuff like lighting, fone and tablet charging, water pumps etc etc
By the time I got up around 8am the batteries were back to full every day
With a 230aH battery it is the almost the equivalent of having 4 x 110aH lead acid batteries in safe usable power for a third of the weight
Lead acid is safe to 50% discharge so 4 x 110 gives a total of 220aH usable before a risk of cell damage
230aH lithium which can safely go down to 10% ( actually lower if needs be but I lean towards caution ) gives me about 210aH of power
On top of that lithium is good for at least ten years, I was replacing my £440 worth of lead acids every 3 years, so even fiscally the lithium makes a lot of sense
) and can pass on the info to anyone interested.............I have one 3kw ( 230 aH ) unit I got from from https://www.lithiumbatteryshop.uk/ over in Ipswich
The chap builds them in house.. Mine was £780 but I know they have gone up to £840
Why I chose him
He is local and invited me to go take a look at the build process
He was MUCH better priced than any where else
Each unit is custom built with grade A cells
When I did not understand a set up parameter he was a fone call away and helped me out
He has since built two other packs for me ( odd ball ones for odd ball apps ) and repaired a pack that came out of a golf cart thing by replacing a few crapped out cells and resetting the BMS
They come with a decent BMS that has blue tooth and an easy to use app
To support the system there are 4 x 125w solar panels ( If I was doing it today I would just use 2 x 250w panels ) utilising a Victron 100-40 MPPT controller ( also blue tooth )
I disabled the on board mains charger and bought a stand alone 20A lithium specific unit from fleabay for £35
I also added a Sterling 60A B2B unit which really does a good job at shoveling the amps back in between park ups if the weather is not solar panel friendly
Whist away in a field last week we used blown air heating at night, the telly for at least 7 hours ( poor Mo was stuck in the van a lot ) plus all the usual stuff like lighting, fone and tablet charging, water pumps etc etc
By the time I got up around 8am the batteries were back to full every day
With a 230aH battery it is the almost the equivalent of having 4 x 110aH lead acid batteries in safe usable power for a third of the weight
Lead acid is safe to 50% discharge so 4 x 110 gives a total of 220aH usable before a risk of cell damage
230aH lithium which can safely go down to 10% ( actually lower if needs be but I lean towards caution ) gives me about 210aH of power
On top of that lithium is good for at least ten years, I was replacing my £440 worth of lead acids every 3 years, so even fiscally the lithium makes a lot of sense
