I fitted my system in Dec 2022. I have 32 x sealed lead-acid VARTA LFD230 batteries, a kind of hybrid starter / habitation battery. They weigh 56kg (123.5 lbs) each. I have two tonne of lead in my garage. I sized it so big (c. 90kWh) so that I would only use around 30% of it over 2-3 days (my...
I've been told by the designer of the cat (Richard Woods) that the hull speed is probably 7-8 knots. To get it to plane you would need to increase the speed to around 12 knots and it would require 10hp more per knot increase in speed. If I could do 5 knots on 2-3kwh of battery I would consider...
Thanks for the replies. The lack of 96V stuff and the fact that it IS 96V stuff, has made me decide that as far as electric is concerned, I'm sticking with 48V. The 48V stuff in the UK has come down in price to make this feasible and I haven't got the kind of budget that 'yacht owners' have. It...
Many thanks for the reply.
I've been so busy with the cat that I haven't checked in here for a while. I've decided to go with a 48v system as the EPropulsion X series are just too expensive for me. I have ordered six Seplos Mason 15kWh batteries and will use three for each side of the cat. I...
Thanks for those replies eggo.
With all that info I feel much more confident now to know what I'm looking at re. charging, depletion and the idiosyncracies of the Juncktek.
Cheers,
Al
'When pulling 200A, what is the current passing through each of the 8 strings?'
I'd have to check that. As you can imagine, having 32 x 240Ah batteries (each weighing 56kgs) was an engineering feat in itself, if I do say so myself. Getting a clamp meter in place is a little difficult but doable...
OK, so I added another Iconica inverter to my setup and also increased the size of the battery bank.
After checking with Photonic Universe that I could add another inverter to the two I already had, without adding any more panels (I haven't got the room or the budget!), I fitted another to the...
I'm starting each day by taking a meter reading of the elec and gas. I've assembled an Open Office spreadsheet which I can put the readings in and instantly see what I've used and the cost. By the end of the month I should have amassed enough data to see what an average day looks like and more...
I'm like Martin Luther King.......'I have a dream'.
Only by this time next week, hopefully I'll be the owner of a 40foot mulithull catamaran. The cat has been partially completed, about 70% and I'll be hopefully finishing it. The build has been based around a twin outboard setup, with twin...
Interestingly, today we had some good solar and the bank did something I hadn't seen before. I had charged it up overnight so that by 7.30am it was sitting at 99% and around 52.6V. The solar lasted for five or six hours (between 9am and 3pm) at a really good output from 2-5.5kW per hour. After...
Hi.
This is a message I have sent to VARTA concerning their VARTA LFD230 sealed lead-acid batteries. I am awaiting their reply.
I have a solar battery bank consisting of 32 x Varta LFD230 12V batteries. The batteries are grouped in sets of 4 in series (to create 48V sets) and then the 8 sets...
Great, I think what you have just indicated is what I saw today. What may have also happened is that the meter may have misaligned over the last few charges and that the 100% SOC might not have been reflected in the reality of the bank charge.
I daren't tell you the 'Junk tek' model of monitor...
Thanks for your thoughts. I may have this wrong, but why do you think the busbar will be at 96V? I've kind of taken what I've learned from installing my home solar system and come up with this. In my 48V home system, I have 28, 12V batteries connected in series / parallel. They are connected in...
Thanks for that link. I'll have to find out how much the E-Propulsion X40 are going to cost and work from there. Their own G-Series batteries are
rated at a maximum charge / discharge of 100A, therefore to run the 40kW motor at peak you'd need four batteries in parallel, I think. Most BMS for...
Hi guys,
As we head into winter in the UK, I've decided to replace the huge lead-acid battery bank I installed nine months ago for a MASON 280L 15kWh battery bank containing Grade B Envision 304Ah prismatic cells. Fogstar, in the UK are offering the 'build your own battery' for £1999, which is...
I managed to input the data that I have collected over the last 6 weeks that shows the performance of the battery bank.
The first 3 columns are self-explanatory. The 'IN/OUT' column is the amount coming from / going to the bank. A negative number means the bank is being charged, a positive...