Rudolph Hart
Well-Known Member
- Joined
- Jun 21, 2020
- Messages
- 830
Just for load shedding it should be plenty. If it was a fully off-grid system then no.Will one battery be enough?
Just for load shedding it should be plenty. If it was a fully off-grid system then no.Will one battery be enough?
Everyone tells me I will need twoTwo people, think so.
Two of what? My quote is for a 5kW system.Everyone tells me I will need two
Batteries. Every electrician/electrical engineer has told me to get two lithium batteries.Two of what? My quote is for a 5kW system.
Batteries?Two of what? My quote is for a 5kW system.
You measure the capacity in Ah or kWh, not the number of batteries. For a small system (like a Mecer modified wave manual system) it will likely be 24V so then you typically use two 12V 105Ah batteries (they are not lithium). For a larger online system like I want it’s typically measured in kWh and the one I’m looking at is 5.5kWh (this is lithium). Depth of discharge is also a factor. The non lithium you typically don’t want to discharge beyond 50% whereas with lithium you can use much more.Batteries. Every electrician/electrical engineer has told me to get two lithium batteries.
Why is that ? That you don't discharge till below 50%You measure the capacity in Ah or kWh, not the number of batteries. For a small system (like a Mecer modified wave manual system) it will likely be 24V so then you typically use two 12V 105Ah batteries (they are not lithium). For a larger online system like I want it’s typically measured in kWh and the one I’m looking at is 5.5kWh (this is lithium). Depth of discharge is also a factor. The non lithium you typically don’t want to discharge beyond 50% whereas with lithium you can use much more.
Those type of batteries last longer if you keep the DoD above 50%. Lithium you can go to 0% or close to it without shortening it's lifespan.Why is that ? That you don't discharge till below 50%
You’ll drastically shorten its life. If you regularly go below 50% on a lead acid (even a deep cycle) it’ll last months rather than years.Why is that ? That you don't discharge till below 50%
Pretty much the same as lead acid.and GEL?
To answer my own question, found your quote and it was 6 x 300W = 1,800W.@Spizz how many watts are your panels in total?
That's not mine, it's an example of the installer I am engaging with. Still trying to figure out the exact configuration and then pricing. But I am now convinced it makes financial sense to go solar. I predict breakeven in FIVE years. Then free electricity.Very neat setup @biometrics.
Convenience of not being left in the dark is preferable to recovering the cost.That's not mine, it's an example of the installer I am engaging with. Still trying to figure out the exact configuration and then pricing. But I am now convinced it makes financial sense to go solar. I predict breakeven in FiVE years. Then free electricity.
That's the thing. I kept on thinking about the inconvenience, but recently realised that the price of electricity has become so much (and will increase) that it makes sense to go "off grid".Convenience of not being left in the dark is preferable to recovering the cost.
The way things are going there may not be a grid. It's wise to take steps to mitigate the risk.That's the thing. I kept on thinking about the inconvenience, but recently realised that the price of electricity has become so much (and will increase) that it makes sense to go "off grid".