Solar battery, should i get 150ah or 200 ah

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jitz

I’m planning to upgrade my inverter battery to c10.
Is it good to go for 150ah or 200 ah battery.
Its a 24 volt system, 2.5kva mppt system, which supports upto 50 percent dod

15600 for 150 ah
22600 for 200 ah.

Both 60m warranty.

I assume 200 ah means im getting more backup.

I’m in bangalore, where daily there is about 3-4 hrs powercut.
Solar is already installed, but if Backup allows, i would switch off grid so that all power is drawn from inverter, else the charging power is too high (right now there is no reduction in bill since day time there is powercut and once sun goes down, power comes back and it charges from grid. 4 yr old battery )

Grid will be used mainly for ac/induction and water motor.

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Yes 200 Ah means more power storage capacity roughly 33% more.

Deal Cadet Deal Cadet
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4 hours power cut in Bangalore everyday!? Why?

Deal Lieutenant Deal Lieutenant
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mango-man wrote:

4 hours power cut in Bangalore everyday!? Why?

Its close to/ is a rural area. Bescom is crazy here. Its near the transmission corp, may be cos of that.
I have no idea why. there are other 500+ residents here.
No one has much issue than poking nose in neighbors affairs. Ur news paper falls in neighbors area, they start yelling. Bescom cuts power , no issue.

Never ive seen anyone complaining.
But i can’t take it anymore. My refrigerator is suffering, everything gets rotten in a day or 2.

Its real, Min 2 hrs, max 6 or 7 hours. Everyday.

Inspite of having this, elect Bill is increasing every month, because charging starts from 6pm. Full load on the inverter transformer for 1 hr till full charge.

Cool Cool
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Smarten 2.5kva mppt lene wala ho to Exide c10 24V 200Ah hi Lena chahiye. 1000w se jyada panel hoga to battery high amp se charging hoga bulk stage me . Exide c10 support upto 20% charging .

Analyst Analyst
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BlueFlash wrote:

@andromeda

I’m little confused.

You can use solar energy to reduce the load on grid(electricity bill) provided the solar source is at its best. But with intermittent sun/ UV energy (atleast in Bangalore), I see a bottle neck here.

But if you are using solar just to charge the battery and use it during evening/night hours, it will reduce the electricity bills. You also have power outages to deal with. In such cases, you cannot really expect savings on your electricity bills, instead it will go high as the battery is hungry in the evenings. Unfortunately you do not have solar support and battery charges from grid, so you will eventually see no change or increase in bills.

Going for 200ah will being in additional backup time, but at the same time if you consume the power, it will be more hungry than 150ah.

Deal Lieutenant Deal Lieutenant
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andromeda wrote:

I’m little confused.

You can use solar energy to reduce the load on grid(electricity bill) provided the solar source is at its best. But with intermittent sun/ UV energy (atleast in Bangalore), I see a bottle neck here.

But if you are using solar just to charge the battery and use it during evening/night hours, it will reduce the electricity bills. You also have power outages to deal with. In such cases, you cannot really expect savings on your electricity bills, instead it will go high as the battery is hungry in the evenings. Unfortunately you do not have solar support and battery charges from grid, so you will eventually see no change or increase in bills.

Going for 200ah will being in additional backup time, but at the same time if you consume the power, it will be more hungry than 150ah.

We might hardly use much power.
I just need 2 fan, 3 lights and couple of routers and a refrigerator running in night.
I would move all low power items to existing battery with a different solar source, once new batteries arrive.

I do not want to regret later, after spending hefty amt for 150ah.

Solar power is good, i was getting 12 amp with a 24 v system. Im supposed to get 31 amp, but mostly because of battery issues, existing is a c20.

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jitz wrote:

We might hardly use much power.
I just need 2 fan, 3 lights and couple of routers and a refrigerator running in night.
I would move all low power items to existing battery with a different solar source, once new batteries arrive.

I do not want to regret later, after spending hefty amt for 150ah.

Solar power is good, i was getting 12 amp with a 24 v system. Im supposed to get 31 amp, but mostly because of battery issues, existing is a c20.

Regarding C20 or C-rating, I have a different opinion. It should not alter the current that your solar setup can put out. So, can’t much comment on that.

Regarding 150 vs 200, I guess you should be able to calculate based on your consumption for the time you are looking for. Consider another 20-30% additional load to meet any unaccounted loads

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