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Search took 0.00 seconds. Search: Posts Made By: markopolo
Forum: Electrical | Charging, Systems, Solar and Generators 05-05-2015, 12:49 AM
Replies: 19
Views: 4,191
Posted By markopolo
Re: MPPT or PWM for older panels in parallel?

It was around 13.2v with a load I think. Amps in would jump around 6.2A, 6.3A & 6.4A.

Today's numbers were interesting and fun to watch.

I put a 120 watt load on the system to make sure I was...
Forum: Electrical | Charging, Systems, Solar and Generators 05-04-2015, 02:31 PM
Replies: 19
Views: 4,191
Posted By markopolo
Re: MPPT or PWM for older panels in parallel?

Maybe my setup is performing OK :thumbup:

Solar noon is 1:16pm today here. This calculator - https://www.where-rv-now.com/Notes/Solar/#Calculator - indicates 6.4 amps would be expected from 125...
Forum: Electrical | Charging, Systems, Solar and Generators 05-03-2015, 10:44 PM
Replies: 19
Views: 4,191
Posted By markopolo
Re: MPPT or PWM for older panels in parallel?

Nice day here too.

Do I use battery voltage or panel voltage to calculate watts? 6.2 amps were coming in at 2pm ........... better than nothing :angel:
Forum: Electrical | Charging, Systems, Solar and Generators 05-03-2015, 12:40 AM
Replies: 19
Views: 4,191
Posted By markopolo
Re: MPPT or PWM for older panels in parallel?

I separated the ground wires today and that solved the issue with the charging light and ammeter. This controller also shows the panel voltage and the battery voltage so it is a useful tool for $28....
Forum: Electrical | Charging, Systems, Solar and Generators 05-02-2015, 01:38 PM
Replies: 19
Views: 4,191
Posted By markopolo
Re: MPPT or PWM for older panels in parallel?

I should add that I think the on / off operation of the old controller was normal after reading the info on the spec sheet.
Forum: Electrical | Charging, Systems, Solar and Generators 05-02-2015, 01:35 PM
Replies: 19
Views: 4,191
Posted By markopolo
Re: MPPT or PWM for older panels in parallel?

Yes, I found the install sheet & info on the old controller: https://specialtyconcepts.com/SPECIALTY_ ... _SHEET.pdf (https://specialtyconcepts.com/SPECIALTY_CONCEPTS_PDF_FILES/SC3_15_SPEC_SHEET.pdf)...
Forum: Electrical | Charging, Systems, Solar and Generators 05-02-2015, 12:18 PM
Replies: 19
Views: 4,191
Posted By markopolo
Re: MPPT or PWM for older panels in parallel?

Thanks for all the suggestions and info.

I bought and installed a really inexpensive PWM controller to use to test the setup and give me some baseline info. First problem I've run into is that...
Forum: Electrical | Charging, Systems, Solar and Generators 04-27-2015, 02:02 PM
Replies: 19
Views: 4,191
Posted By markopolo
MPPT or PWM for older panels in parallel?

There's a 40 watt panel from 1994 and an 85 watt panel from 2006 on my van. I assume they are the 12v type and are paralleled. The van has spent a lot of its life under cover in garages.

The...
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