scenario –
have got solar panels rating VOC 92V, PMAX 60W ISC 1.19A (kaneka G-EAO60) as the panels are new they idle closer to 94-96vdc
what I have to charge , a quantity of 90AH SLA batteries. cycle 14.4 – 15.0v, standby 13.5 – 13.8v
there's nothing really commercially available to fit at that voltage. have built linear chargers and could put something together to do the job, just trying to bring myself up to date with something a bit more current.
objective –
have 4 panels up already (individually) been wasting sunshine for a few months now but working wonderfully as an awning got another 4 going up shortly. Would like to have the charging circuit(s) running off the batteries as they are being charged. Current draw for circuit there would be negligible ~ 100ma worst case
thoughts -
obviously pwm / smps circuit is best option, from the majority of reading i've done, most people seem to prefer to use high side pchannel mosfets. Do have irf9540's, by229's on hand and its nchannel companion (irf540's). mosfet drivers down(under) seem to be a bit of a rarity unless massive quantities are involved. opto couplers and photo interrupters are available. current thoughts, 555 for pwm - opto - mosfet
the odd issue
just to clarify myself, due to memory issues, I do sometimes have troubles understanding concepts. (couple major car accidents in the teen years) putting that aside, so many options available, would like some thoughts on people preferences.
have sufficient tools to do the job (cro/iron/bits and pieces/coffee) also plenty of time
If anyone can point me in the right direction, greatly appreciated. will also be building this device for someone else which will have to be id-10-t proofed, but can worry about that after working prototype.
edit: page formatting
have got solar panels rating VOC 92V, PMAX 60W ISC 1.19A (kaneka G-EAO60) as the panels are new they idle closer to 94-96vdc
what I have to charge , a quantity of 90AH SLA batteries. cycle 14.4 – 15.0v, standby 13.5 – 13.8v
there's nothing really commercially available to fit at that voltage. have built linear chargers and could put something together to do the job, just trying to bring myself up to date with something a bit more current.
objective –
have 4 panels up already (individually) been wasting sunshine for a few months now but working wonderfully as an awning got another 4 going up shortly. Would like to have the charging circuit(s) running off the batteries as they are being charged. Current draw for circuit there would be negligible ~ 100ma worst case
thoughts -
obviously pwm / smps circuit is best option, from the majority of reading i've done, most people seem to prefer to use high side pchannel mosfets. Do have irf9540's, by229's on hand and its nchannel companion (irf540's). mosfet drivers down(under) seem to be a bit of a rarity unless massive quantities are involved. opto couplers and photo interrupters are available. current thoughts, 555 for pwm - opto - mosfet
the odd issue
just to clarify myself, due to memory issues, I do sometimes have troubles understanding concepts. (couple major car accidents in the teen years) putting that aside, so many options available, would like some thoughts on people preferences.
have sufficient tools to do the job (cro/iron/bits and pieces/coffee) also plenty of time
If anyone can point me in the right direction, greatly appreciated. will also be building this device for someone else which will have to be id-10-t proofed, but can worry about that after working prototype.
edit: page formatting